NSA/MWR/C1  - no air temperature signal

When the new blower was upgraded by Radiometrics and reinstalled on the MWR, the air 
temperature sensor failed to properly report. It was determined that the wires carrying the 
signal to the analog board did not conform to the standard expected by the upgraded blower. 
The problem was corrected by changing the wiring and modifying the MWR software to read 
the signal from the appropriate corresponding channel.

• tkair

• Raw data stream - documentation not supported

• tkair

NSA/SKYRAD/C1 - itermittant IRT bias

A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky 
temperature measurement then a sudden correction, as compared to AERI, appears to have been 
caused by a combination of a failing IR detector, a poor signal cable, a contaminated 
(with condensation or frost) mirror or lens, and low ambient temperatures. The positive 
bias was apparently not consistant in either frequency or duration but on days when the 
unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. 

The instrument was repaired and recalibrated and the signal cable replaced.

• sky_ir_temp_min
• sky_ir_temp_std
• sky_ir_temp_max
• Temperature, Sky Infra-Red(sky_ir_temp)

NSA/MFRSR/C1 - No data collected during winter

The sun does not rise above the horizon at the NSA sites between November and January each 
year.  During this time period, the MFR instruments are removed and returned to PNNL for 
maintenance and calibration.  The instruments are generally re-installed in March.

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• hemisp_narrowband_filter2_raw
• diffuse_hemisp_broadband_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• diffuse_hemisp_narrowband_filter3_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter6_raw
• time_offset
• hemisp_narrowband_filter5_raw
• hemisp_narrowband_filter6_raw
• alltime_hemisp_broadband
• offset_filter1
• offset_filter2
• offset_filter3
• offset_filter4
• offset_filter5
• offset_filter6
• time
• hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter5_raw
• offset_broadband
• head_temp
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• logger_volt
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_hemisp_narrowband_filter4_raw
• lat
• base_time
• hemisp_broadband_raw
• direct_horizontal_broadband
• diffuse_hemisp_narrowband_filter1_raw
• logger_temp
• diffuse_hemisp_broadband
• hemisp_broadband
• hemisp_narrowband_filter1_raw
• hemisp_narrowband_filter4_raw
• diffuse_hemisp_narrowband_filter2_raw
• alltime_hemisp_narrowband_filter6
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter3
• alltime_hemisp_narrowband_filter1
• head_temp2
• lon
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• alt

• cosine_correction_we_filter1
• cosine_correction_we_filter2
• cosine_correction_we_filter3
• cosine_correction_we_filter4
• cosine_correction_sn_filter1
• cosine_correction_sn_filter2
• cosine_correction_sn_filter3
• cosine_correction_sn_filter4
• cosine_correction_sn_filter5
• alltime_hemisp_broadband
• cosine_correction_sn_filter6
• cosine_correction_we_filter6
• cosine_correction_we_filter5
• diffuse_correction_filter4
• diffuse_correction_filter3
• diffuse_correction_filter6
• diffuse_correction_filter5
• diffuse_correction_filter1
• diffuse_correction_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• computed_cosine_correction_filter6
• computed_cosine_correction_filter5
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• computed_cosine_correction_filter4
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• computed_cosine_correction_filter3
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• computed_cosine_correction_filter2
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• computed_cosine_correction_filter1
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• airmass
• lon
• nominal_calibration_factor_filter1
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• wavelength_filter1
• nominal_calibration_factor_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• wavelength_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• nominal_calibration_factor_filter5
• wavelength_filter5
• nominal_calibration_factor_filter6
• wavelength_filter6
• nominal_calibration_factor_filter3
• wavelength_filter3
• nominal_calibration_factor_filter4
• wavelength_filter4
• lat
• offset_broadband
• time
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter3
• alltime_hemisp_narrowband_filter1
• alltime_hemisp_narrowband_filter6
• cosine_correction_we_broadband
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• elevation_angle
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• computed_cosine_correction_broadband
• head_temp2
• diffuse_correction_broadband
• direct_diffuse_ratio_filter1
• logger_temp
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter5
• direct_diffuse_ratio_filter2
• nominal_calibration_factor_broadband
• direct_diffuse_ratio_broadband
• direct_diffuse_ratio_filter3
• head_temp
• direct_horizontal_broadband
• hemisp_broadband
• direct_diffuse_ratio_filter6
• logger_volt
• normalized_transmittance_filter2
• normalized_transmittance_filter1
• diffuse_hemisp_broadband
• solar_zenith_angle
• time_offset
• cosine_solar_zenith_angle
• cosine_correction_sn_broadband
• normalized_transmittance_filter3
• normalized_transmittance_filter4
• normalized_transmittance_filter5
• bench_angle
• normalized_transmittance_filter6
• base_time
• azimuth_angle
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• offset_filter2
• offset_filter1
• offset_filter6
• offset_filter5
• offset_filter4
• offset_filter3
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• alt
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

NSA/MFR10M/C1 - No data collected during winter

The sun does not rise above the horizon at the NSA sites between
November and January each year.  During this time period, the MFR
instruments are removed and returned to PNNL for maintenance
and calibration.  The instruments are generally re-installed in
March.

• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6)
• logger_volt
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5)
• head_temp
• callang_flags
• cosine_solar_zenith_angle
• time_offset
• time
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)
• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)
• alt
• lon
• base_time
• 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)
• lat

• time_offset
• head_temp
• lat
• time
• 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)
• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)
• callang_flags
• lon
• alt
• base_time
• logger_volt

NSA/MWR/C1 - poor air temperature values

After the air temperature sensor was rewired due to a change with the new blower 
(D030515.3), the measurement was initially incorrect. There is no apparent cause for the bad 
signal or its improvement.

• tkair

• tkair

NSA/MFRSR/C1 - Shadowband misalignment

There were shading problems during the specified period, at different times of the day 
during the time period.  Portions of the data have acceptable shading and can be used by 
experienced data users applying appropriate screening.

• barnard_lnI_broadband
• michalsky_rejected_broadband
• barnard_rejected_broadband
• michalsky_rejected_filter1
• michalsky_rejected_filter3
• michalsky_rejected_filter2
• michalsky_rejected_filter5
• michalsky_rejected_filter4
• michalsky_rejected_filter6
• michalsky_lnI_broadband
• michalsky_lnI_filter1
• michalsky_lnI_filter2
• barnard_rejected_filter5
• barnard_rejected_filter6
• barnard_rejected_filter3
• barnard_rejected_filter4
• barnard_rejected_filter1
• barnard_rejected_filter2
• michalsky_lnI_filter6
• michalsky_lnI_filter5
• michalsky_lnI_filter4
• michalsky_lnI_filter3
• barnard_lnI_filter6
• barnard_lnI_filter5
• barnard_lnI_filter4
• barnard_lnI_filter3
• barnard_lnI_filter2
• barnard_lnI_filter1

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• direct_horizontal_broadband
• diffuse_hemisp_broadband
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6

• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_broadband
• diffuse_hemisp_broadband
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

• michalsky_badflag_filter4
• michalsky_optical_depth_broadband
• michalsky_badflag_filter5
• michalsky_badflag_filter6
• michalsky_number_points_broadband
• barnard_solar_constant_sdist_broadband
• barnard_badflag_broadband
• barnard_number_points_broadband
• michalsky_good_fraction_filter1
• michalsky_good_fraction_filter2
• michalsky_good_fraction_filter3
• michalsky_good_fraction_filter4
• michalsky_good_fraction_filter5
• michalsky_good_fraction_filter6
• barnard_optical_depth_filter1
• barnard_optical_depth_filter4
• barnard_optical_depth_filter5
• barnard_optical_depth_filter2
• barnard_optical_depth_filter3
• michalsky_standard_deviation_filter4
• michalsky_standard_deviation_filter5
• michalsky_standard_deviation_filter2
• michalsky_standard_deviation_filter3
• michalsky_standard_deviation_filter6
• barnard_optical_depth_filter6
• michalsky_badflag_filter3
• michalsky_standard_deviation_filter1
• michalsky_badflag_filter2
• michalsky_badflag_filter1
• michalsky_angstrom_exponent
• barnard_error_fit_filter5
• barnard_error_fit_filter4
• barnard_error_fit_filter6
• barnard_error_fit_filter1
• barnard_error_fit_filter3
• barnard_good_fraction_broadband
• barnard_error_fit_filter2
• michalsky_optical_depth_filter2
• michalsky_optical_depth_filter1
• michalsky_optical_depth_filter4
• michalsky_optical_depth_filter3
• michalsky_optical_depth_filter6
• michalsky_optical_depth_filter5
• barnard_error_fit_broadband
• barnard_good_fraction_filter6
• barnard_good_fraction_filter1
• barnard_good_fraction_filter5
• barnard_good_fraction_filter4
• barnard_good_fraction_filter3
• barnard_good_fraction_filter2
• barnard_badflag_filter5
• barnard_badflag_filter6
• barnard_number_points_filter6
• barnard_number_points_filter5
• barnard_badflag_filter1
• barnard_number_points_filter4
• barnard_badflag_filter2
• barnard_number_points_filter3
• barnard_badflag_filter3
• barnard_number_points_filter2
• barnard_badflag_filter4
• barnard_number_points_filter1
• barnard_optical_depth_broadband
• michalsky_standard_deviation_broadband
• barnard_angstrom_exponent
• michalsky_badflag_broadband
• michalsky_good_fraction_broadband
• barnard_error_slope_filter2
• barnard_error_slope_filter3
• barnard_error_slope_filter4
• barnard_error_slope_filter5
• barnard_error_slope_filter1
• barnard_error_slope_broadband
• barnard_error_slope_filter6
• michalsky_number_points_filter5
• michalsky_number_points_filter4
• michalsky_number_points_filter6
• barnard_solar_constant_sdist_filter5
• michalsky_number_points_filter1
• barnard_solar_constant_sdist_filter4
• michalsky_number_points_filter3
• barnard_solar_constant_sdist_filter6
• michalsky_number_points_filter2
• barnard_solar_constant_sdist_filter1
• barnard_solar_constant_sdist_filter3
• barnard_solar_constant_sdist_filter2

NSA/SKYRAD/C1 - Datalogger grounding problem

Both PIRs reported unreasonable high readings with coincident low reading from the IRT. 
Since both PIR instruments exhibited exactly the same behaviour and the IRT an opposite 
response during large suspect data excursions this indicates that the false signal maybe the 
result of poor grounding. 

The PIR1,2 data and the IRT data are most adversely affected.  During the problem periods 
PIR irradiance increased (typ pos 200-300W/m2) while the IRT response was negative (typ 
neg 20-30W/m2) but followed the response of the PIR.  The Skyrad shortwave instruments 
were also affected but to much less extent (within their uncertainties).  Data quality flags 
are typically not triggered during these problem periods.

Data logger grounding was improved on 6/10 2005.  The problem hasn't re-occurred since 
that time.

• Raw data stream - documentation not supported

• down_long_hemisp_shaded2_std
• psps_mean
• alt
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• uvb_mean
• nip_min
• down_long_hemisp_shaded1_max
• short_direct_normal_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• psp1_min
• psp1_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• nip_max
• sky_ir_temp_std
• base_time
• uvb_min
• down_uvb_std
• external_voltage
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• nip_mean
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• uvb_sd
• uvb_max
• pirs_sd
• Temperature, Sky Infra-Red(sky_ir_temp)
• psp1_sd
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• nip_sd
• lon
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• internal_voltage
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• irt1_sd
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• pir1_max
• down_long_hemisp_shaded1_min
• down_long_hemisp_unshaded_std
• sky_ir_temp_min
• sky_ir_temp_max
• psps_min
• down_long_hemisp_shaded2_max
• pirs_mean
• logger_temp
• pirs_min
• pir1_sd
• pirs_max
• psps_sd
• down_short_diffuse_hemisp_std
• pir1_mean
• psp1_mean
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• irt1_mean
• lat
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• irt1_min
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• bit_data
• time_offset
• irt1_max
• filename
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_long_hemisp_shaded2_min
• pir1_min
• psps_max
• down_long_hemisp_shaded1_std

• inst_down_long_unshaded_case_resist
• pir2_uncorr_irradiance
• base_time
• inst_down_uvb_temp
• inst_down_long_shaded2_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_unshaded_tp)
• inst_down_long_shaded2_case_resist
• lat
• pir1_uncorr_irradiance
• pir1_case_therm
• alt
• lon
• inst_down_long_unshaded_dome_resist
• filename
• pir2_dome_therm
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)
• time_offset
• inst_down_long_shaded_dome_resist
• inst_down_long_shaded1_case_resist
• inst_down_long_shaded_case_resist
• uvb_temp
• inst_down_long_shaded1_dome_resist
• uvb_uncorr_irradiance
• pir2_case_therm
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• pir1_dome_therm

• inst_sky_ir_signal
• inst_down_long_shaded2_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_global
• alt
• time_offset
• inst_down_long_shaded1_case_resist
• inst_down_long_shaded1_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded2_dome_resist
• inst_diffuse
• lat
• base_time
• inst_direct_normal
• time
• lon

NSA/GNDRAD/C1/C2 - Upwelling Shortwave data flagged bad are good.

The Upwelling Shortwave at both NSA facilites, C1 and C2, have been flagged red by the 
automatic tests because it is above empiical limits determined for a more southerly site 
(SGP) for this time of year. The data are good and should be flagged green. The test limits 
will be revised for NSA.

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

NSA/MWR/C1 - Reprocess: Revised Calibration Coefficients

IN THE BEGINNING (June 1992), the retrieval coefficients used to derive 
the precipitable water vapor (PWV) and liquid water path (LWP) from the 
MWR brightness temperatures were based on the Liebe and Layton (1987) 
water vapor and oxygen absorption model and the Grant (1957) liquid 
water absorption model.

Following the SHEBA experience, revised retrievals based on the more 
recent Rosenkranz (1998) water vapor and oxygen absorption models and 
the Liebe (1991) liquid waer absorption model were developed.  The 
Rosenkranz water vapor absorption model resulted a 2 percent increase 
in PWV relative to the earlier Liebe and Layton model.  The Liebe 
liquid water absorption model decreased the LWP by 10% relative to the 
Grant model.  However, the increased oxygen absorption caused a 
0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly 
significant for low LWP conditions (i.e. thin clouds encountered at 
SHEBA).

Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and 
Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 
22 GHz water vapor line from the HITRAN compilation, which is 5 percent 
smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz 
(1998), provided a better fit to the microwave brightness temperature 
measurements at 5 frequencies in the range 22-30 GHz, and yielded more 
accurate retrievals. Accordingly, revised MWR retrieval coefficients 
have been developed using MONORTM, which utilizes the HITRAN compilation 
for its spectroscopic parameters.  These new retrievals provide 3 
percent less PWV and 2.6 percent greater LWP than the previous 
retrievals based on Rosenkranz (1998).

Although the MWR data will be reprocessed to apply the new monortm-based 
retrievals, for most purposes it will be sufficient to correct the data 
using the following factors:

PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ
LWP_MONORTM = 1.026  * LWP_ROSENKRANZ

The Rosenkranz-based retrieval coefficients became active at NSA.C1 
20020425.1900.  The MONORTM-based retrieval coefficients became active 
at NSA.C1 20050629.0000.

Note: a reprocessing effort is already underway to apply the 
Rosenkranz-based retrieval coefficients to all MWR prior to April 
2002.  An additional reprocessing task will be undertaken to apply 
the MONORTM retrieval to all MWR data when the first is completed. 
Read reprocessing comments in the netcdf file header carefully to 
ensure you are aware which retrieval is in play.

• Total water vapor along LOS path(vap)
• Total liquid water along LOS path(liq)

• Total liquid water along LOS path(liq)
• Total water vapor along LOS path(vap)

• Total water vapor along LOS path(vap)
• Total liquid water along LOS path(liq)

• mean_liq_mwr
• mean_vap_mwr

• vaptip
• liqtip

NSA/MWR/C1 - Possible loss of accuracy due to missing blower

On 7/09 the MWR blower failed. The blower prevents snow and liquid drop from accumulating 
on the window. Accumulation of snow or liquid results in a loss of accuracy of the 
instrument. The loss of accuracy has consequencies on the retrieved liquid water path and 
precipitable water vapor. Usually there will be an overestimation of liquid and vapor. The 
blower was repaired and reinstalled on 7/20. Between 7/9 and 7/20 the tkair variable is 
unavailable as well.

• 31.4 GHz sky brightness temperature(tbsky31)
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• sky31
• sky23
• Total water vapor along LOS path(vap)
• wet_window
• tkair

• vaptip
• tipsky31
• tipsky23
• liqtip
• wet_window
• tbskytip31
• tkair
• tbskytip23

NSA/GNDRAD/C1 - Power Disconnected Briefly

Power to the Tip tower and Groundrad was disconnected briefly while ground resistance 
measurements were made. 

The following comments are from Inst. Mentor Tom Stoffel: 

The longwave and shortwave irradiances from GNDRAD were not effected by the
temporary power disconnect.  Data are good.  This would have only stopped
the ventilators for a brief time and the data do not show any signs of poor
instrument responses.

The "sfc_ir_temp" data were, however, impacted during the brief (2
readings?) interval.

• Effective Surface (Skin) Temperature(sfc_ir_temp)
• external_voltage

NSA/MWR/C1 - Instrument problem, Heater problem

The heater of the MWR was ON all the time even when the moisture sensor was dry. Jim 
Liljegren suspected a problem with the relay that activates the heater. The suggested action 
was to send the faulty assembly to SGP for repair and get a spare unit from SGP.
The spare unit was sent on 9/15 and was installed on 10/18.

• 31.4 GHz sky brightness temperature(tbsky31)
• lon
• tnd23
• tknd
• tnd_nom23
• bb31
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky23
• tkxc
• Total water vapor along LOS path(vap)
• alt
• tkbb
• time_offset
• wet_window
• bbn23
• tkair
• base_time
• lat
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd31
• bb23
• tc23
• sky31
• tnd_nom31
• actel
• tc31
• actaz
• Temperature, brightness, longwave(ir_temp)
• bbn31

• Raw data stream - documentation not supported

NSA/MWR/C1 - New software version (4.15) installed

A problem began with the installation of MWR.EXE version 4.12 in September 2002. The 
software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one 
that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of 
tip curves, and saturation of CPU usage.  Software versions 4.13 and 4.14 also produced 
these problems.

The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.

• 31.4 GHz sky brightness temperature(tbsky31)
• tnd23
• tknd
• tnd_nom23
• bb31
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky23
• tkxc
• Total water vapor along LOS path(vap)
• tkbb
• bbn23
• tkair
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd31
• bb23
• tc23
• sky31
• tnd_nom31
• tc31
• Temperature, brightness, longwave(ir_temp)
• bbn31

• tnd23
• tkxc
• tnd_nom23
• bb31
• tc31
• tnd31I
• liqtip
• tkbb
• bbn31
• tbskytip31
• r31
• tkair
• vaptip
• bb23
• tnd_nom31
• tnd23I
• tipsky31
• tknd
• tc23
• tipsky23
• r23
• tbskytip23
• bbn23
• tnd31

NSA/MWR/C1 - Reprocess: wrong calibration

When MWR#20 was returned to service on 9/1/2005, the calibration had changed as a result 
of the repairs made by Radiometrics and the RF deck temperature had been set to 325K for 
testing. On 9/2, the temperature was decreased to 307K to prevent thermal instability in 
winter and the calibration was changed in the configuration file with the values supplied 
on the repair report.  

The data need to be reprocessed with the calibration coefficients that were automatically 
derived after these changes were put into affect. They are: tnd_nom23=185.621, 
tnd_nom31=158.801, tc23=-0.022, tc31=-0.039.

• 31.4 GHz sky brightness temperature(tbsky31)
• Total liquid water along LOS path(liq)
• Total water vapor along LOS path(vap)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)

• 31.4 GHz sky brightness temperature(tbsky31)
• Total water vapor along LOS path(vap)
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)

• vaptip
• liqtip
• tbskytip31
• tbskytip23

NSA/MWR/C1 -  Incorrect time stamp

On Sept 27 the motherboard of the MWR computer was replaced. Following the replacement, 
the date on the computer was not set to the correct time of day, therefore the date and 
time in the files were wrong. The time on the computer was reset on Sept. 30. Time stamps 
between Sept. 27 and Sept. 30 were later corrected based on gathered information, however 
they may have as much as 5 minutes of uncertainty.

• 31.4 GHz sky brightness temperature(tbsky31)
• lon
• tnd23
• tknd
• tnd_nom23
• bb31
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky23
• tkxc
• Total water vapor along LOS path(vap)
• alt
• tkbb
• time_offset
• wet_window
• bbn23
• tkair
• base_time
• lat
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd31
• bb23
• tc23
• sky31
• tnd_nom31
• actel
• tc31
• actaz
• Temperature, brightness, longwave(ir_temp)
• bbn31

• Raw data stream - documentation not supported

NSA/SKYRAD/C1 - IRT failure

The IRT failed and was replaced with a spare.

• sky_ir_temp_min
• sky_ir_temp_std
• sky_ir_temp_max
• Temperature, Sky Infra-Red(sky_ir_temp)

NSA/SKYRAD/C1 - Instrument logger, possible gounding problem

Possible Skyrad datalogger grounding issues have re-appeared at NSA/C1 for only this short 
time period.  Anomalous data readings during the time range specified are similar to 
problem which occurred in early summer 2005.

• Raw data stream - documentation not supported

• down_long_hemisp_shaded2_std
• down_long_hemisp_unshaded_std
• sky_ir_temp_min
• sky_ir_temp_max
• psps_mean
• psps_min
• down_long_hemisp_shaded2_max
• pirs_mean
• alt
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• logger_temp
• nip_min
• uvb_mean
• down_long_hemisp_shaded1_max
• pir1_sd
• pirs_min
• short_direct_normal_std
• pirs_max
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• psps_sd
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• psp1_min
• psp1_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• pir1_mean
• nip_max
• psp1_mean
• sky_ir_temp_std
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• base_time
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• irt1_mean
• uvb_min
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• lat
• down_uvb_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• external_voltage
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• nip_mean
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• uvb_sd
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• uvb_max
• pirs_sd
• irt1_min
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• bit_data
• Temperature, Sky Infra-Red(sky_ir_temp)
• time_offset
• psp1_sd
• irt1_max
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• filename
• down_long_hemisp_shaded2_min
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• lon
• nip_sd
• pir1_min
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• internal_voltage
• down_long_hemisp_shaded_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• irt1_sd
• psps_max
• pir1_max
• down_long_hemisp_shaded1_std
• down_long_hemisp_shaded1_min

• inst_down_long_shaded1_case_resist
• inst_down_long_shaded1_dome_resist
• inst_sky_ir_signal
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded2_dome_resist
• inst_down_long_shaded2_case_resist
• inst_diffuse
• lat
• base_time
• inst_direct_normal
• time
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_global
• lon
• alt
• time_offset

NSA/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave

The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set 
to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were 
installed.  The result of no delay in these measurements results in an error in the measured 
resistance of the thermistors, Case1 and Dome2 and thus the calculated PIR1 and PIR2 
irradiances.  The errors are inversely proportial to temperature.

Users can apply the temperature dependent irradiance corrections shown in the table below. 
 Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 
W/m2.  The error corrections become the same order of magnitude or larger than the 
instrument uncertainties at or below 260K or 9F. 

Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance				
	DIR1	DIR1	DIR2	DIR2
T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]	Correction[W/m2]
109.4	316.13	0.00	316.13	0.00
100.5	311.20	-0.15	311.20	0.12
93.2	307.14	-0.12	307.14	0.10
87.0	303.70	-0.10	303.70	0.08
81.6	300.70	-0.17	300.70	0.14
77.0	298.15	-0.22	298.15	0.18
59.4	288.35	-0.34	288.35	0.27
47.4	281.72	-0.23	281.72	0.18
38.5	276.74	-0.42	276.74	0.34
31.3	272.77	-0.48	272.77	0.38
25.4	269.48	-0.61	269.48	0.49
20.3	266.67	-0.67	266.67	0.54
16.0	264.25	-0.82	264.25	0.66
12.1	262.11	-0.98	262.11	0.79
8.7	260.19	-0.97	260.19	0.78
5.6	258.46	-1.07	258.46	0.86
2.7	256.89	-1.17	256.89	0.94
0.1	255.44	-1.33	255.44	1.07
-2.3	254.11	-1.41	254.11	1.13
-4.5	252.87	-1.43	252.87	1.15
-6.6	251.71	-1.52	251.71	1.22
-8.5	250.63	-1.63	250.63	1.31
-10.4	249.62	-1.73	249.62	1.39
-12.2	248.58	-1.79	248.58	1.44
-15.4	246.82	-1.93	246.82	1.55
-18.3	245.23	-2.05	245.23	1.65
-20.9	243.78	-2.22	243.78	1.78
-23.3	242.44	-2.36	242.44	1.89
-25.5	241.21	-2.58	241.21	2.07
-27.5	240.07	-2.65	240.07	2.13
-29.5	239.01	-2.75	239.01	2.21
-31.3	238.00	-3.02	238.00	2.42

• down_long_hemisp_shaded2_std
• down_long_hemisp_shaded2_min
• down_long_hemisp_shaded2_max
• down_long_hemisp_shaded1_max
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• down_long_hemisp_shaded1_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• down_long_hemisp_shaded1_min

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded1_case_resist
• inst_down_long_shaded2_dome_resist
• inst_down_long_shaded2_case_resist
• inst_down_long_shaded1_dome_resist

NSA/GNDRAD/C1 - power outage affecting some GNDRAD sensors

During the power outage the upwelling global measurement from the PSP instrument shows a 
slight increase from -5 to +0 W/m2.  This is due to removal of thermal offsets induced by 
the AC heater during the power outage.  This heater is installed within the PSP 
ventilator - it is necessary for the NSA/C1 climate.
The upwelling longwave PIR instrument is unaffected due to case and dome temperature 
corrections.
The IRT is AC powered and was not operational during this time period.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• sfc_ir_temp_std
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Raw data stream - documentation not supported

• inst_sfc_ir_signal

NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments

During the power outage the downwelling global measurement from the PSP instrument and 
downwelling diffuse 8-48 instrument shows a slight increase from -5 to +0 W/m2.  This is due 
to removal of thermal offsets induced by the AC heater during the power outage.  This 
heater is installed within the PSP ventilator - it is necessary for the NSA/C1 climate.
The downwelling longwave PIR instrument is unaffected due to case and dome temperature 
corrections.
The IRT is AC powered and was not operational during this time period.

• Raw data stream - documentation not supported

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_hemisp_std
• Temperature, Sky Infra-Red(sky_ir_temp)

• inst_global
• inst_diffuse
• inst_sky_ir_signal

NSA/SKYRAD/C1 - Instrument noise

Skyrad data appears affected by noise creating bias in analog voltage readings on 
02/15/2006 from 1300-1800GMT and again on 02/16/2006 from 1300-1500GMT.  The second night the 
noise is attenuated significantly.  By 02/17 no bias/noise is detectable. The thermistor 
measurements in PIR1 and PIR2 were unaffected during these excursions and showed no 
deviation from normal during the problem period.  In addition, the onboard logger temperature and 
battery voltage read normal throughout.  The problem has not reappeared as of 4/25/2006.

• down_long_hemisp_shaded2_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• sky_ir_temp_min
• sky_ir_temp_max
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_long_hemisp_shaded2_max
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_long_hemisp_shaded1_max
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• short_direct_normal_std
• Temperature, Sky Infra-Red(sky_ir_temp)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_long_hemisp_shaded2_min
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• sky_ir_temp_std
• down_long_hemisp_shaded1_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp_shaded1_min

• inst_down_long_shaded1_case_resist
• inst_down_long_shaded1_dome_resist
• inst_sky_ir_signal
• inst_direct_normal
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_global
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded2_dome_resist
• inst_down_long_shaded2_case_resist
• inst_diffuse

NSA/MFR10M/C1 - Head not being heated

Head heater was not operational during the period specified.

• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5)
• head_temp
• callang_flags
• cosine_solar_zenith_angle
• 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)
• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)

• head_temp
• 25 meter Broadband Upwelling Hemispheric Irradiance(up_hemisp_broadband)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 6(up_hemisp_narrowband_filter6)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 5(up_hemisp_narrowband_filter5)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 4(up_hemisp_narrowband_filter4)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 2(up_hemisp_narrowband_filter2)
• 25 meter Upwelling Narrowband Hemispheric Irradiance, Filter 3(up_hemisp_narrowband_filter3)
• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)
• callang_flags

NSA/SKYRAD/C1 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)

NSA/GNDRAD/C1 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

NSA/MWR/C1 - TKAIR sensor failure

Between 7/14 and 7/28 the tkair variable is missing most of the time and sometimes has 
large negative spikes.  On 7/28, the sensor was cleaned of corrosion and the readings came 
back to normal.

• tkair

NSA/SKYRAD/C1 - Summer solstice shading of radiometers

On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP 
(global hemispheic shortwave measurement) radiometers are shaded by other instruments or 
support structures.  Shading azimuths have been determined for this site.  The radiometer 
mentor suggests not using the data from the NIP and PSP radiometers when the sun is 
within the following azimuth bounds (typically from May 8th to August 5th of each year):
Instrmt Obstruction     AzStart     AzEnd     
NIP     rad table       346         358
NIP     met tower       13          15
PSP     mfrsr           6           16

• psps_sd
• psp1_sd
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• psps_mean
• psps_min
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• nip_sd
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• psp1_min
• psp1_max
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• nip_mean
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• nip_min
• psps_max
• nip_max
• psp1_mean
• down_short_hemisp_std
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

NSA/GNDRAD/C1 - Incorrect calibration coefficients

BarrowC1, Gndrad. On Aug 11th the PSP-US was changed out and the Campbell program was 
changed to reflect this.  However, an old program that uses the 4 coefficient PIR cal factors 
was used. The PIR-UIR was not changed out, however, the logger program coeffs reverted 
back to the 4 Coeffcients.  The Eppley PIR-UIR coefficients for this S/N 30168F3 are :  
K0=0.0, K1(aka k)=.25253, K2= 1.0, K3=-4, Kr=0.0.

• net_min
• pir1_mean
• net_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• pir1_sd
• net_mean
• net_sd
• up_long_hemisp_std
• net_max
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• pir1_max
• pir1_min

• Raw data stream - documentation not supported

• pir1_case_therm
• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• pir1_dome_therm
• pir1_voltage
• inst_up_long_dome_resist

• inst_up_long_dome_resist
• inst_up_long_hemisp_tp
• inst_up_long_case_resist

NSA/MFRSR/C1 - Minor shading problem

There was a very minor shading problem when the instrument resumed banding after solar 
midnight.  This only affected a small portion of each day; not more than two hours after the 
instrument resumed banding after solar midnight.  7/9 is the best example of the 
problem.  The boundaries of this DQR are a little loose as the often cloudy conditions make it 
difficult to precisely say when the problem stopped.  Maintenance was performed on 9/5, 
but the problem was not visible sometime before that.

• barnard_lnI_broadband
• michalsky_rejected_broadband
• michalsky_airmass
• barnard_rejected_broadband
• barnard_airmass
• michalsky_rejected_filter1
• michalsky_rejected_filter3
• michalsky_rejected_filter2
• michalsky_rejected_filter5
• michalsky_rejected_filter4
• michalsky_rejected_filter6
• michalsky_lnI_broadband
• michalsky_lnI_filter1
• michalsky_lnI_filter2
• barnard_rejected_filter5
• barnard_rejected_filter6
• barnard_rejected_filter3
• barnard_rejected_filter4
• barnard_rejected_filter1
• barnard_rejected_filter2
• michalsky_lnI_filter6
• michalsky_lnI_filter5
• michalsky_lnI_filter4
• michalsky_lnI_filter3
• barnard_lnI_filter6
• barnard_lnI_filter5
• barnard_lnI_filter4
• barnard_lnI_filter3
• barnard_lnI_filter2
• barnard_lnI_filter1

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• direct_horizontal_broadband
• diffuse_hemisp_broadband
• hemisp_broadband
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6

• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_broadband
• hemisp_broadband
• diffuse_hemisp_broadband
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

• michalsky_badflag_filter4
• michalsky_optical_depth_broadband
• michalsky_badflag_filter5
• michalsky_badflag_filter6
• michalsky_number_points_broadband
• barnard_solar_constant_sdist_broadband
• barnard_badflag_broadband
• barnard_number_points_broadband
• michalsky_good_fraction_filter1
• michalsky_good_fraction_filter2
• michalsky_good_fraction_filter3
• michalsky_good_fraction_filter4
• michalsky_good_fraction_filter5
• michalsky_good_fraction_filter6
• barnard_optical_depth_filter1
• barnard_optical_depth_filter4
• barnard_optical_depth_filter5
• barnard_optical_depth_filter2
• barnard_optical_depth_filter3
• michalsky_standard_deviation_filter4
• michalsky_standard_deviation_filter5
• michalsky_standard_deviation_filter2
• michalsky_standard_deviation_filter3
• michalsky_standard_deviation_filter6
• barnard_optical_depth_filter6
• michalsky_badflag_filter3
• michalsky_standard_deviation_filter1
• michalsky_badflag_filter2
• michalsky_badflag_filter1
• michalsky_angstrom_exponent
• barnard_error_fit_filter5
• barnard_error_fit_filter4
• barnard_error_fit_filter6
• barnard_error_fit_filter1
• barnard_error_fit_filter3
• barnard_good_fraction_broadband
• barnard_error_fit_filter2
• michalsky_optical_depth_filter2
• michalsky_optical_depth_filter1
• michalsky_optical_depth_filter4
• michalsky_optical_depth_filter3
• michalsky_optical_depth_filter6
• michalsky_optical_depth_filter5
• michalsky_solar_constant_filter4
• michalsky_solar_constant_filter3
• barnard_error_fit_broadband
• michalsky_solar_constant_filter6
• michalsky_solar_constant_filter5
• barnard_good_fraction_filter6
• michalsky_solar_constant_filter2
• michalsky_solar_constant_filter1
• barnard_good_fraction_filter1
• barnard_good_fraction_filter5
• barnard_good_fraction_filter4
• barnard_good_fraction_filter3
• barnard_good_fraction_filter2
• barnard_badflag_filter5
• barnard_badflag_filter6
• barnard_number_points_filter6
• barnard_number_points_filter5
• barnard_number_points_filter4
• barnard_badflag_filter1
• barnard_number_points_filter3
• barnard_badflag_filter2
• barnard_number_points_filter2
• barnard_badflag_filter3
• barnard_number_points_filter1
• barnard_badflag_filter4
• barnard_optical_depth_broadband
• michalsky_solar_constant_broadband
• michalsky_standard_deviation_broadband
• barnard_angstrom_exponent
• michalsky_badflag_broadband
• michalsky_good_fraction_broadband
• barnard_error_slope_filter2
• barnard_error_slope_filter3
• barnard_error_slope_filter4
• barnard_error_slope_filter5
• barnard_error_slope_filter1
• barnard_error_slope_broadband
• barnard_error_slope_filter6
• michalsky_solar_constant_sdist_filter2
• michalsky_solar_constant_sdist_filter1
• michalsky_solar_constant_sdist_filter4
• michalsky_solar_constant_sdist_filter3
• michalsky_solar_constant_sdist_filter6
• michalsky_solar_constant_sdist_filter5
• michalsky_number_points_filter5
• michalsky_number_points_filter4
• michalsky_number_points_filter6
• barnard_solar_constant_sdist_filter5
• michalsky_number_points_filter1
• barnard_solar_constant_sdist_filter4
• michalsky_number_points_filter3
• barnard_solar_constant_sdist_filter6
• michalsky_number_points_filter2
• barnard_solar_constant_sdist_filter1
• barnard_solar_constant_sdist_filter3
• barnard_solar_constant_sdist_filter2
• michalsky_solar_constant_sdist_broadband

NSA/MFR10M/C1 - Channel 415 noise

There are some very minor downward spikes in the 415 channel that were first noticed in 
the daytime data on 9/7/2006.  They occur throughout Sept and less into Oct/Nov.  The 
instrument was pulled on 11/22 and will be examined over the winter.  The spikes really are 
very minor, and at times only appear as minor bulges when the plot is expanded to a very 
large scale.

• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)

• 25 meter Upwelling Hemispheric Irradiance, Filter 1(up_hemisp_narrowband_filter1)

NSA/MFRSR/C1 - Ch 673 false signal

Channel 673 was reporting bad data immediately after the post winter installation.  The 
cause was likely a bad connection.  All other channels are OK.  Do not use 673 for the 
period covered by this DQR.

• michalsky_lnI_filter4
• michalsky_rejected_filter4
• barnard_rejected_filter4
• barnard_lnI_filter4

• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• direct_horizontal_narrowband_filter4

• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• direct_horizontal_narrowband_filter4

• michalsky_badflag_filter4
• barnard_error_fit_filter4
• michalsky_solar_constant_sdist_filter4
• michalsky_optical_depth_filter4
• michalsky_good_fraction_filter4
• michalsky_solar_constant_filter4
• barnard_optical_depth_filter4
• michalsky_number_points_filter4
• barnard_solar_constant_sdist_filter4
• barnard_good_fraction_filter4
• michalsky_standard_deviation_filter4
• barnard_error_slope_filter4
• barnard_number_points_filter4
• barnard_badflag_filter4

NSA/MWR/C1 - Rain sensor always on

The rain sensor was always on between 10/5 and 10/23 2006.
The user should be aware that not all data flagged as rainy are actually rainy. The 
problem was caused by a shift in the sensitivity of the rain sensor and was corrected by 
changing the sensor threshold in the configuration file.

• wet_window

• wet_window

NSA/MFRSR/C1 - Reprocessed: Recalibration

The originally applied calibrations were bad.  Corrected calibrations were applied and 
reprocessed data were archived February 5, 2007.

(Note: these data were subsequently reprocessed again and archived in November 2007)

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• direct_horizontal_broadband
• diffuse_hemisp_broadband
• hemisp_broadband
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6

• direct_horizontal_broadband
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• hemisp_broadband
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• diffuse_hemisp_broadband
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• direct_horizontal_narrowband_filter2
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• direct_horizontal_narrowband_filter3
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• direct_horizontal_narrowband_filter4

NSA/MFRSR/C1 - 940 Channel failure

Channel 940 failed and will not be replaced before the system is removed for calibration 
in the Fall.

• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• direct_horizontal_narrowband_filter6
• alltime_hemisp_narrowband_filter6
• hemisp_narrowband_filter6_raw
• diffuse_hemisp_narrowband_filter6_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)

• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• alltime_hemisp_narrowband_filter6
• direct_horizontal_narrowband_filter6
• direct_diffuse_ratio_filter6
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)

NSA/SKYRAD/C1 - Preventive maintenance

Preventive maintenance to rebuild ventilator fan and exchange instruments during this time 
removed Skyrad instruments from operation.  Most data collected are not scientifically 
relevant.

• down_long_hemisp_shaded2_std
• down_long_hemisp_unshaded_std
• psps_mean
• psps_min
• down_long_hemisp_shaded2_max
• pirs_mean
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• uvb_mean
• nip_min
• down_long_hemisp_shaded1_max
• pirs_min
• pir1_sd
• short_direct_normal_std
• pirs_max
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• psps_sd
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• psp1_min
• psp1_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• pir1_mean
• psp1_mean
• nip_max
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• uvb_min
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• down_uvb_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• external_voltage
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• nip_mean
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• uvb_sd
• down_short_hemisp_std
• uvb_max
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
• pirs_sd
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
• psp1_sd
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• filename
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_long_hemisp_shaded2_min
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• nip_sd
• pir1_min
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• psps_max
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• pir1_max
• down_long_hemisp_shaded1_std
• down_long_hemisp_shaded1_min

• inst_down_long_shaded1_case_resist
• inst_down_long_shaded1_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
• inst_down_long_shaded2_dome_resist
• inst_down_long_shaded2_case_resist
• inst_diffuse
• inst_direct_normal
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
• inst_global

NSA/GNDRAD/C1 - Preventive maintenance

Preventive maintenance including ventilator repairs and instrument changeout during this 
time resulted in data that are not scientifically relevant.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• psp1_sd
• net_std
• net_mean
• net_max
• up_long_hemisp_std
• psp1_mean
• pir1_max
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• up_short_hemisp_std
• net_min
• pir1_mean
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• pir1_sd
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• net_sd
• psp1_min
• psp1_max
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• pir1_min

• inst_up_long_dome_resist
• inst_up_short_hemisp
• inst_up_long_hemisp_tp
• inst_up_long_case_resist

NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient

Installed Skyrad PSP (downwelling shortwave hemispheric irradiance) had calibration 
coefficient Rs applied when it should have used Rsc.  ARM is using IR corrected Rsc and CFc 
coefficients for PSPs deployed at all facilities.  

PSP #32026 should use RSc@45=8.7578 ?V/W/m? and not Rs@45=8.6335.

Reprocessed to correct downwelling shortwave hemispheric irradiance (DS) by:
DS(new) = (DS(old) / 115.83 ) * 114.18

Reprocessing completed March 2008.

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)

• inst_global

NSA/GNDRAD/C1 - Reprocessed: Incorrect calibration coefficient

Installed Gndrad PSP (upwelling shortwave hemispheric irradiance) had calibration 
coefficient RS applied when it should have used Rsc.  ARM is using IR corrected coefficients 
Rsc@45 and CFc@45 for PSPs deployed at all facilities.  

PSP #32012F3 should use RSc@45=109.39 and not Rs@45=110.97.  

Reprocessed to correct upwelling shortwave hemispheric irradiance (US) by:
US(new) = (US(old) / 110.97 ) * 109.39

Reprocessing completed March 2008.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• inst_up_short_hemisp

NSA/SKYRAD/C1 - Instrument cleaning effects

Starting Dec 16th the Skyrad PIR1 and PIR2 (down_long_hemispheric)started differing by 
greater than 30W/m2 at times.  This is much greater than expected  for these instruments 
(typical is <10-15 W/m2).  NSA OMIS reports and observer comments reveal that PM 
periodically clean the snow from the IRT and ventilator fans on Skyrad and Gndrad.  In the case of 
the Skyrad PIRs, one lies in the wind shadow of the other and builds up more snow which is 
periodically cleaned out and then builds up again causing the PIR1 PIR2 discrepancies.

Disregard down_long_hemispheric during this time period. However, data suggests PIR2 is 
most likely at fault - potentially use PIR1 data during this time period.

• inst_down_long_hemisp2_tp
• inst_down_long_hemisp2_case_temp
• inst_down_long_hemisp1_dome_temp
• down_long_hemisp2_min
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• down_long_hemisp2_max
• down_long_hemisp2_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• inst_down_long_hemisp1_case_temp
• down_long_hemisp1_min
• inst_down_long_hemisp1_tp
• down_long_hemisp1_std
• inst_down_long_hemisp2_dome_temp
• down_long_hemisp1_max

• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp2_tp
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist

NSA/SKYRAD/C1 - IRT mirror heater failure

The heater of the IRT gold mirror failed due to a broken wire (that probably occurred on 
12/13 during maintenance of the solar tracker) allowing snow and frost to accumulate on 
the mirror until it was cleared during daily preventative maintenance. The problem was 
corrected when the heater wires were replaced.

• sky_ir_temp_min
• sky_ir_temp_std
• sky_ir_temp_max
• Temperature, Sky Infra-Red(sky_ir_temp)

• inst_sky_ir_signal

NSA/MFRSR/C1 - Sensor shading problem

Immediately following the post winter re-installation, a shading problem is evident 
between the hours of 1900 and 0200 (spans midnight).  This continues until 4/10/2008 when an 
attempt was made to resolve the problem.  It helped some, but shifted the shading problem 
between the hours of 0200 - 1900.  On 6/19/2008 site maintenance resolved the problem.

• time_offset
• lat
• barnard_rejected_broadband
• michalsky_lnI_broadband
• alt
• lon
• barnard_lnI_broadband
• michalsky_rejected_broadband
• barnard_airmass
• base_time
• barnard_lnI_filter6
• barnard_lnI_filter5
• barnard_lnI_filter4
• barnard_lnI_filter3
• barnard_lnI_filter2
• barnard_lnI_filter1
• michalsky_airmass
• michalsky_rejected_filter1
• michalsky_rejected_filter3
• michalsky_rejected_filter2
• michalsky_rejected_filter5
• michalsky_rejected_filter4
• michalsky_rejected_filter6
• michalsky_lnI_filter1
• michalsky_lnI_filter2
• barnard_rejected_filter5
• barnard_rejected_filter6
• barnard_rejected_filter3
• barnard_rejected_filter4
• barnard_rejected_filter1
• barnard_rejected_filter2
• michalsky_lnI_filter6
• michalsky_lnI_filter5
• michalsky_lnI_filter4
• michalsky_lnI_filter3

• diffuse_hemisp_broadband_raw
• diffuse_hemisp_narrowband_filter4_raw
• diffuse_hemisp_broadband
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• diffuse_hemisp_narrowband_filter1_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter6_raw
• diffuse_hemisp_narrowband_filter2_raw
• diffuse_hemisp_narrowband_filter5_raw
• direct_horizontal_broadband

• lon
• head_temp
• offset_filter2
• offset_filter1
• offset_filter6
• offset_filter5
• offset_filter4
• offset_filter3
• diffuse_correction_filter4
• diffuse_correction_filter3
• diffuse_correction_filter6
• diffuse_correction_filter5
• diffuse_correction_filter1
• diffuse_correction_filter2
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• head_temp2
• logger_temp
• logger_volt
• time_offset
• cosine_solar_zenith_angle
• cosine_correction_sn_broadband
• bench_angle
• alt
• cosine_correction_we_filter1
• cosine_correction_we_filter2
• cosine_correction_we_filter3
• cosine_correction_we_filter4
• alltime_hemisp_broadband
• cosine_correction_we_filter6
• cosine_correction_we_filter5
• lat
• time
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter3
• alltime_hemisp_narrowband_filter1
• alltime_hemisp_narrowband_filter6
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• computed_cosine_correction_broadband
• diffuse_correction_broadband
• azimuth_angle
• cosine_correction_sn_filter1
• cosine_correction_sn_filter2
• cosine_correction_sn_filter3
• cosine_correction_sn_filter4
• cosine_correction_sn_filter5
• cosine_correction_sn_filter6
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• computed_cosine_correction_filter6
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• computed_cosine_correction_filter5
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• computed_cosine_correction_filter4
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• computed_cosine_correction_filter3
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• computed_cosine_correction_filter2
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• computed_cosine_correction_filter1
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• airmass
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• wavelength_filter1
• nominal_calibration_factor_filter1
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• wavelength_filter2
• nominal_calibration_factor_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• wavelength_filter5
• nominal_calibration_factor_filter5
• wavelength_filter6
• nominal_calibration_factor_filter6
• wavelength_filter3
• nominal_calibration_factor_filter3
• wavelength_filter4
• nominal_calibration_factor_filter4
• offset_broadband
• cosine_correction_we_broadband
• elevation_angle
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_diffuse_ratio_filter1
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter5
• direct_diffuse_ratio_filter2
• direct_diffuse_ratio_broadband
• direct_diffuse_ratio_filter3
• nominal_calibration_factor_broadband
• direct_horizontal_broadband
• hemisp_broadband
• direct_diffuse_ratio_filter6
• normalized_transmittance_filter2
• normalized_transmittance_filter1
• diffuse_hemisp_broadband
• solar_zenith_angle
• normalized_transmittance_filter3
• normalized_transmittance_filter4
• normalized_transmittance_filter5
• normalized_transmittance_filter6
• base_time
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• azimuth_angle
• variability_flag
• offset_broadband
• bench_angle
• alltime_hemisp_broadband
• cosine_correction_we_filter6
• cosine_correction_we_filter4
• cosine_correction_we_filter5
• cosine_correction_we_filter2
• cosine_correction_we_filter3
• cosine_correction_we_filter1
• airmass
• hemisp_narrowband_filter4_raw
• alt
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_correction_broadband
• sun_to_earth_distance
• diffuse_hemisp_broadband_raw
• direct_diffuse_ratio_broadband
• diffuse_hemisp_narrowband_filter1_raw
• time
• logger_volt
• diffuse_hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter1_raw
• diffuse_hemisp_narrowband_filter4_raw
• Wavelength of spectrum data(wavelength)
• hemisp_narrowband_filter5_raw
• hemisp_broadband
• Total optical depth direct narrowband filter 5(total_optical_depth_filter5)
• Total optical depth direct narrowband filter 4(total_optical_depth_filter4)
• hemisp_broadband_raw
• Total optical depth direct narrowband filter 1(total_optical_depth_filter1)
• Total optical depth direct narrowband filter 3(total_optical_depth_filter3)
• Total optical depth direct narrowband filter 2(total_optical_depth_filter2)
• direct_horizontal_broadband
• angstrom_exponent
• surface_pressure
• nominal_calibration_factor_broadband
• computed_cosine_correction_filter1
• computed_cosine_correction_filter2
• computed_cosine_correction_filter3
• computed_cosine_correction_filter4
• computed_cosine_correction_filter5
• computed_cosine_correction_filter6
• Ozone_absorption_coefficient_filter5
• Ozone_absorption_coefficient_filter4
• Ozone_absorption_coefficient_filter1
• Ozone_absorption_coefficient_filter3
• Ozone_absorption_coefficient_filter2
• elevation_angle
• lon
• head_temp2
• diffuse_hemisp_narrowband_filter3_raw
• diffuse_hemisp_broadband
• hemisp_narrowband_filter2_raw
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Ozone_column_amount
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• computed_cosine_correction_broadband
• logger_temp
• diffuse_correction_filter1
• diffuse_correction_filter2
• diffuse_correction_filter3
• time_offset
• diffuse_correction_filter4
• diffuse_correction_filter5
• wavelength_filter6
• wavelength_filter3
• wavelength_filter2
• wavelength_filter5
• wavelength_filter4
• TOA_irradiance
• Io_filter4
• Io_filter3
• Io_filter5
• wavelength_filter1
• Io_filter2
• Io_filter1
• diffuse_correction_filter6
• cosine_solar_zenith_angle
• normalized_transmittance_filter1
• diffuse_hemisp_narrowband_filter2_raw
• normalized_transmittance_filter4
• normalized_transmittance_filter5
• normalized_transmittance_filter2
• base_time
• normalized_transmittance_filter3
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter1
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter3
• normalized_transmittance_filter6
• Rayleigh_optical_depth_filter5
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• Rayleigh_optical_depth_filter4
• Rayleigh_optical_depth_filter3
• Rayleigh_optical_depth_filter2
• Rayleigh_optical_depth_filter1
• cosine_correction_sn_filter2
• cosine_correction_sn_filter1
• cosine_correction_sn_broadband
• alltime_hemisp_narrowband_filter5
• alltime_hemisp_narrowband_filter6
• cosine_correction_sn_filter6
• cosine_correction_sn_filter5
• cosine_correction_sn_filter4
• cosine_correction_sn_filter3
• Aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• Aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• Aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• Aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• hemisp_narrowband_filter3_raw
• Aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• head_temp
• nominal_calibration_factor_filter1
• nominal_calibration_factor_filter3
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• nominal_calibration_factor_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• nominal_calibration_factor_filter5
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• nominal_calibration_factor_filter4
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• nominal_calibration_factor_filter6
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• offset_filter6
• offset_filter3
• offset_filter2
• offset_filter5
• offset_filter4
• offset_filter1
• diffuse_hemisp_narrowband_filter5_raw
• direct_diffuse_ratio_filter6
• direct_diffuse_ratio_filter5
• direct_diffuse_ratio_filter2
• direct_diffuse_ratio_filter1
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter3
• solar_zenith_angle
• lat
• hemisp_narrowband_filter6_raw
• cosine_correction_we_broadband

• michalsky_standard_deviation_filter4
• michalsky_standard_deviation_filter5
• michalsky_standard_deviation_filter2
• michalsky_standard_deviation_filter3
• michalsky_standard_deviation_filter6
• michalsky_standard_deviation_filter1
• alt
• barnard_badflag_filter5
• barnard_badflag_filter6
• barnard_badflag_filter1
• barnard_badflag_filter2
• barnard_badflag_filter3
• barnard_badflag_filter4
• time_offset
• barnard_error_slope_filter2
• barnard_error_slope_filter3
• barnard_error_slope_filter4
• barnard_error_slope_filter5
• barnard_error_slope_filter1
• barnard_error_slope_broadband
• barnard_error_slope_filter6
• michalsky_solar_constant_sdist_filter2
• michalsky_solar_constant_sdist_filter1
• michalsky_solar_constant_sdist_filter4
• michalsky_solar_constant_sdist_filter3
• michalsky_solar_constant_sdist_filter6
• michalsky_solar_constant_sdist_filter5
• barnard_solar_constant_sdist_filter5
• barnard_solar_constant_sdist_filter4
• barnard_solar_constant_sdist_filter6
• barnard_solar_constant_sdist_filter1
• barnard_solar_constant_sdist_filter3
• barnard_solar_constant_sdist_filter2
• lon
• michalsky_badflag_filter4
• michalsky_badflag_filter5
• michalsky_optical_depth_broadband
• michalsky_badflag_filter6
• michalsky_number_points_broadband
• barnard_solar_constant_sdist_broadband
• barnard_badflag_broadband
• barnard_number_points_broadband
• michalsky_badflag_filter3
• michalsky_badflag_filter2
• michalsky_badflag_filter1
• michalsky_angstrom_exponent
• barnard_good_fraction_filter6
• barnard_good_fraction_filter1
• barnard_good_fraction_filter5
• barnard_good_fraction_filter4
• barnard_good_fraction_filter3
• barnard_good_fraction_filter2
• barnard_number_points_filter6
• barnard_number_points_filter5
• barnard_number_points_filter4
• barnard_number_points_filter3
• barnard_number_points_filter2
• barnard_number_points_filter1
• barnard_angstrom_exponent
• lat
• michalsky_good_fraction_filter1
• michalsky_good_fraction_filter2
• michalsky_good_fraction_filter3
• michalsky_good_fraction_filter4
• michalsky_good_fraction_filter5
• michalsky_good_fraction_filter6
• barnard_error_fit_filter5
• barnard_error_fit_filter4
• barnard_error_fit_filter6
• barnard_error_fit_filter1
• barnard_error_fit_filter3
• barnard_error_fit_filter2
• barnard_good_fraction_broadband
• michalsky_optical_depth_filter2
• michalsky_optical_depth_filter1
• michalsky_optical_depth_filter4
• michalsky_optical_depth_filter3
• michalsky_optical_depth_filter6
• michalsky_optical_depth_filter5
• michalsky_solar_constant_filter4
• michalsky_solar_constant_filter3
• michalsky_solar_constant_filter6
• michalsky_solar_constant_filter5
• michalsky_solar_constant_filter2
• michalsky_solar_constant_filter1
• michalsky_standard_deviation_broadband
• michalsky_good_fraction_broadband
• base_time
• barnard_optical_depth_filter1
• barnard_optical_depth_filter4
• barnard_optical_depth_filter5
• barnard_optical_depth_filter2
• barnard_optical_depth_filter3
• barnard_optical_depth_filter6
• barnard_error_fit_broadband
• barnard_optical_depth_broadband
• michalsky_solar_constant_broadband
• michalsky_badflag_broadband
• michalsky_number_points_filter5
• michalsky_number_points_filter4
• michalsky_number_points_filter6
• michalsky_number_points_filter1
• michalsky_number_points_filter3
• michalsky_number_points_filter2
• michalsky_solar_constant_sdist_broadband

• Raw data stream - documentation not supported

NSA/SKYRAD/C1 - Direct and Diffuse incorrect

The short_direct_normal (NIP) instrument and cable were damaged by tracker rewind 
malfunction. Tracker and NIP replaced on 4/22 2200GMT but tracker not operational until 4/23 
1815GMT.  Thus, down_short_diffuse_hemisp (8-48) was not shaded 4/22 to 4/23.

Do not use 8-48 data from 4/22 to 4/23. NIP data is not recoverable during entire time but 
can be estimated using component sum for each 1 minute data: Direct = (global - 
diffuse)/cos(zenith angle)

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• short_direct_normal_std
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)

• inst_diffuse
• inst_direct_normal

NSA/MWR/C1 - Spikes in air temperature readings

During this month there are occasional negative spikes in the Tkair variable. The problem 
may be corrosion in the temperature sensor or the infiltration of water from melting snow.
The dewblower was replaced and a new sensor installed

• tkair

• tkair

NSA/MWR/C1 - Missing surface air temperature data

Some wires in the dewblower were not correctly configured.

• tkair

• tkair

NSA/SKYRAD/C1 - Tracker inoperative

Tracker stopped working at this site during the time range specified. Reason for failure 
is unknown.  Tracker power cycled and restarted by maintenance 06/30 2008 1740 GMT.

The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data are bad during 
this time.  Data are not recoverable.

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)

• inst_diffuse
• inst_direct_normal

NSA/GNDRAD/C1 - Upwelling PIR ventilator fan failure

The PIR exhibited a positive bias of approximately 6 W/m2 compared to the upwelling IRT 
due to ventilator fan failure.  Thus, the up_long_hemisp, data stream is high by about 6 
W/m2.    
   
Bias is not consistent and depends on atmospheric conditions. Either disregard the 
up_long_hemisp data or use the IRT for an estimate of the up_long_hemisp values during this time 
period.

• inst_up_long_hemisp_dome_temp
• inst_up_long_hemisp_tp
• inst_up_long_hemisp_case_temp
• up_long_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)

• inst_up_long_hemisp_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_hemisp_dome_resist

NSA/MFRSR/C1 - Missing data

Data are missing and unrecoverable.

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• hemisp_narrowband_filter2_raw
• diffuse_hemisp_broadband_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• diffuse_hemisp_narrowband_filter3_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter6_raw
• time_offset
• hemisp_narrowband_filter5_raw
• hemisp_narrowband_filter6_raw
• alltime_hemisp_broadband
• offset_filter1
• offset_filter2
• offset_filter3
• offset_filter4
• offset_filter5
• offset_filter6
• time
• hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter5_raw
• offset_broadband
• head_temp
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• logger_volt
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_hemisp_narrowband_filter4_raw
• lat
• base_time
• hemisp_broadband_raw
• direct_horizontal_broadband
• diffuse_hemisp_narrowband_filter1_raw
• logger_temp
• diffuse_hemisp_broadband
• hemisp_broadband
• hemisp_narrowband_filter1_raw
• hemisp_narrowband_filter4_raw
• diffuse_hemisp_narrowband_filter2_raw
• alltime_hemisp_narrowband_filter6
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter3
• alltime_hemisp_narrowband_filter1
• head_temp2
• lon
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• alt

• cosine_correction_we_filter1
• cosine_correction_we_filter2
• cosine_correction_we_filter3
• cosine_correction_we_filter4
• cosine_correction_sn_filter1
• cosine_correction_sn_filter2
• cosine_correction_sn_filter3
• cosine_correction_sn_filter4
• cosine_correction_sn_filter5
• alltime_hemisp_broadband
• cosine_correction_sn_filter6
• cosine_correction_we_filter6
• cosine_correction_we_filter5
• diffuse_correction_filter4
• diffuse_correction_filter3
• diffuse_correction_filter6
• diffuse_correction_filter5
• diffuse_correction_filter1
• diffuse_correction_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• computed_cosine_correction_filter6
• computed_cosine_correction_filter5
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• computed_cosine_correction_filter4
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• computed_cosine_correction_filter3
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• computed_cosine_correction_filter2
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• computed_cosine_correction_filter1
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• airmass
• lon
• nominal_calibration_factor_filter1
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• wavelength_filter1
• nominal_calibration_factor_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• wavelength_filter2
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• nominal_calibration_factor_filter5
• wavelength_filter5
• nominal_calibration_factor_filter6
• wavelength_filter6
• nominal_calibration_factor_filter3
• wavelength_filter3
• nominal_calibration_factor_filter4
• wavelength_filter4
• lat
• offset_broadband
• time
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter3
• alltime_hemisp_narrowband_filter1
• alltime_hemisp_narrowband_filter6
• cosine_correction_we_broadband
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• elevation_angle
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• computed_cosine_correction_broadband
• head_temp2
• diffuse_correction_broadband
• direct_diffuse_ratio_filter1
• logger_temp
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter5
• direct_diffuse_ratio_filter2
• nominal_calibration_factor_broadband
• direct_diffuse_ratio_broadband
• direct_diffuse_ratio_filter3
• head_temp
• direct_horizontal_broadband
• hemisp_broadband
• direct_diffuse_ratio_filter6
• logger_volt
• normalized_transmittance_filter2
• normalized_transmittance_filter1
• diffuse_hemisp_broadband
• solar_zenith_angle
• time_offset
• cosine_solar_zenith_angle
• cosine_correction_sn_broadband
• normalized_transmittance_filter3
• normalized_transmittance_filter4
• normalized_transmittance_filter5
• bench_angle
• normalized_transmittance_filter6
• base_time
• azimuth_angle
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• offset_filter2
• offset_filter1
• offset_filter6
• offset_filter5
• offset_filter4
• offset_filter3
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• alt
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

NSA/MWR/C1 - Incorrect brightness temperatures and retrievals

The brightness temperatures and retrieved PWV and LWP show a sudden jump and have values 
that are too high. The suddenly jump back to normal at around 1800 UTC. All other 
parameters seem reasonable so the cause of the jump may just be due to accumulation of either 
snow or melting ice on the radome.

• Total water vapor along LOS path(vap)
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• 31.4 GHz sky brightness temperature(tbsky31)

• 31.4 GHz sky brightness temperature(tbsky31)
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• Total water vapor along LOS path(vap)
• tkair

• vaptip
• liqtip
• tbskytip31
• tkair
• tbskytip23

NSA/SKYRAD/C1 - IRT covered with snow

The IRT mirror was buried with snow by the dew-line snow-blower.

• sky_ir_temp_min
• sky_ir_temp_std
• sky_ir_temp_max
• Temperature, Sky Infra-Red(sky_ir_temp)

NSA/MWR/C1 - RFI screening test

The instrument was covered with a shield to test the effect on the RF interference that is 
affecting the measurements since February. The test was performed on 4/15 and 4/16 for a 
few hours.

• 31.4 GHz sky brightness temperature(tbsky31)
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky23
• tkxc
• Total water vapor along LOS path(vap)
• tkbb
• bbn23
• tkair
• bb23
• sky31
• tnd_nom31
• Temperature, brightness, longwave(ir_temp)
• bbn31
• tnd23
• tknd
• tnd_nom23
• bb31
• wet_window
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd31
• tc23
• actel
• tc31
• actaz

• tnd_nom23
• bb31
• tnd31I
• liqtip
• wet_window
• bbn31
• r31
• tkair
• tnd_nom31
• tknd
• tc23
• r23
• bbn23
• tkxc
• tnd23
• tc31
• actel
• tkbb
• tbskytip31
• actaz
• vaptip
• bb23
• tnd23I
• tipsky31
• tipsky23
• tbskytip23
• tnd31

NSA/MWR/C1 - High noise in 23.8-GHz channel

Starting approximately on February 13 the MWR experienced high level of noise in the 23.8 
GHz channel. The spikes became more prominent around Feb 17 and increased after that date 
as well. The cause of the interference was identified as the nearby MWRP on Oct 13 and 
the instruments were realigned.

• sky23
• Total water vapor along LOS path(vap)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)

• vaptip
• tipsky23
• tbskytip23

NSA/MWR/C1 - Intermittent air temperature readings

Starting on 5/23 the air temperature readings (tkair) were intermittent and had negative 
spikes

• tkair

• tkair

NSA/MWR/C1 - Air temperature readings missing

The air temperature readings (tkair) dropped on 5/26. The signal was restored on 6/10.

• tkair

• tkair

NSA/MFRSR/C1 - Shadowband misalignment

There is a minor shading issue at high zenith angles (0530 - 1630 UTC).  Due to extremely 
persistent cloudy conditions, maintenance was not attempted until 20090811.  Cloudy 
conditions persisted, and it was never clear from the data if the instrument was shading 
properly at high zenith angles.  Therefore, the DQR end date is listed as the time maintenance 
was performed.

• barnard_lnI_broadband
• michalsky_rejected_broadband
• barnard_airmass
• barnard_lnI_filter6
• barnard_lnI_filter5
• barnard_lnI_filter4
• barnard_lnI_filter3
• barnard_lnI_filter2
• barnard_lnI_filter1
• michalsky_airmass
• barnard_rejected_broadband
• michalsky_rejected_filter1
• michalsky_rejected_filter3
• michalsky_rejected_filter2
• michalsky_rejected_filter5
• michalsky_rejected_filter4
• michalsky_rejected_filter6
• michalsky_lnI_broadband
• michalsky_lnI_filter1
• michalsky_lnI_filter2
• barnard_rejected_filter5
• barnard_rejected_filter6
• barnard_rejected_filter3
• barnard_rejected_filter4
• barnard_rejected_filter1
• barnard_rejected_filter2
• michalsky_lnI_filter6
• michalsky_lnI_filter5
• michalsky_lnI_filter4
• michalsky_lnI_filter3

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• diffuse_hemisp_broadband_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter5_raw
• hemisp_narrowband_filter3_raw
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_hemisp_narrowband_filter4_raw
• diffuse_hemisp_broadband
• hemisp_narrowband_filter1_raw
• hemisp_narrowband_filter4_raw
• diffuse_hemisp_narrowband_filter2_raw
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• hemisp_narrowband_filter2_raw
• hemisp_narrowband_filter6_raw
• diffuse_hemisp_narrowband_filter5_raw
• hemisp_broadband_raw
• direct_horizontal_broadband
• diffuse_hemisp_narrowband_filter1_raw
• hemisp_broadband

• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_broadband
• hemisp_broadband
• diffuse_hemisp_broadband
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• diffuse_hemisp_narrowband_filter3_raw
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• diffuse_hemisp_broadband
• hemisp_narrowband_filter2_raw
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Ozone_column_amount
• airmass
• hemisp_narrowband_filter4_raw
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_hemisp_broadband_raw
• diffuse_hemisp_narrowband_filter1_raw
• TOA_irradiance
• Io_filter4
• Io_filter3
• Io_filter5
• Io_filter2
• Io_filter1
• diffuse_hemisp_narrowband_filter2_raw
• diffuse_hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter1_raw
• Rayleigh_optical_depth_filter5
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• Rayleigh_optical_depth_filter4
• Rayleigh_optical_depth_filter3
• Rayleigh_optical_depth_filter2
• Rayleigh_optical_depth_filter1
• diffuse_hemisp_narrowband_filter4_raw
• Aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• Aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• Aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• Aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• hemisp_narrowband_filter3_raw
• Aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• hemisp_narrowband_filter5_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• hemisp_broadband
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Total optical depth direct narrowband filter 5(total_optical_depth_filter5)
• Total optical depth direct narrowband filter 4(total_optical_depth_filter4)
• hemisp_broadband_raw
• Total optical depth direct narrowband filter 1(total_optical_depth_filter1)
• Total optical depth direct narrowband filter 3(total_optical_depth_filter3)
• Total optical depth direct narrowband filter 2(total_optical_depth_filter2)
• diffuse_hemisp_narrowband_filter5_raw
• direct_horizontal_broadband
• Ozone_absorption_coefficient_filter5
• Ozone_absorption_coefficient_filter4
• Ozone_absorption_coefficient_filter1
• Ozone_absorption_coefficient_filter3
• Ozone_absorption_coefficient_filter2
• hemisp_narrowband_filter6_raw

• michalsky_good_fraction_filter1
• michalsky_good_fraction_filter2
• michalsky_good_fraction_filter3
• michalsky_good_fraction_filter4
• michalsky_good_fraction_filter5
• michalsky_good_fraction_filter6
• michalsky_standard_deviation_filter4
• michalsky_standard_deviation_filter5
• michalsky_standard_deviation_filter2
• michalsky_standard_deviation_filter3
• michalsky_standard_deviation_filter6
• michalsky_standard_deviation_filter1
• barnard_error_fit_filter5
• barnard_error_fit_filter4
• barnard_error_fit_filter6
• barnard_error_fit_filter1
• barnard_error_fit_filter3
• barnard_error_fit_filter2
• barnard_good_fraction_broadband
• michalsky_optical_depth_filter2
• michalsky_optical_depth_filter1
• michalsky_optical_depth_filter4
• michalsky_optical_depth_filter3
• michalsky_optical_depth_filter6
• michalsky_optical_depth_filter5
• michalsky_solar_constant_filter4
• michalsky_solar_constant_filter3
• michalsky_solar_constant_filter6
• michalsky_solar_constant_filter5
• michalsky_solar_constant_filter2
• michalsky_solar_constant_filter1
• barnard_badflag_filter5
• barnard_badflag_filter6
• barnard_badflag_filter1
• barnard_badflag_filter2
• barnard_badflag_filter3
• barnard_badflag_filter4
• michalsky_standard_deviation_broadband
• michalsky_good_fraction_broadband
• barnard_error_slope_filter2
• barnard_error_slope_filter3
• barnard_error_slope_filter4
• barnard_error_slope_filter5
• barnard_error_slope_filter1
• barnard_error_slope_broadband
• barnard_error_slope_filter6
• michalsky_solar_constant_sdist_filter2
• michalsky_solar_constant_sdist_filter1
• michalsky_solar_constant_sdist_filter4
• michalsky_solar_constant_sdist_filter3
• michalsky_solar_constant_sdist_filter6
• michalsky_solar_constant_sdist_filter5
• barnard_solar_constant_sdist_filter5
• barnard_solar_constant_sdist_filter4
• barnard_solar_constant_sdist_filter6
• barnard_solar_constant_sdist_filter1
• barnard_solar_constant_sdist_filter3
• barnard_solar_constant_sdist_filter2
• michalsky_badflag_filter4
• michalsky_optical_depth_broadband
• michalsky_badflag_filter5
• michalsky_badflag_filter6
• michalsky_number_points_broadband
• barnard_solar_constant_sdist_broadband
• barnard_badflag_broadband
• barnard_number_points_broadband
• barnard_optical_depth_filter1
• barnard_optical_depth_filter4
• barnard_optical_depth_filter5
• barnard_optical_depth_filter2
• barnard_optical_depth_filter3
• barnard_optical_depth_filter6
• michalsky_badflag_filter3
• michalsky_badflag_filter2
• michalsky_badflag_filter1
• michalsky_angstrom_exponent
• barnard_error_fit_broadband
• barnard_good_fraction_filter6
• barnard_good_fraction_filter1
• barnard_good_fraction_filter5
• barnard_good_fraction_filter4
• barnard_good_fraction_filter3
• barnard_good_fraction_filter2
• barnard_number_points_filter6
• barnard_number_points_filter5
• barnard_number_points_filter4
• barnard_number_points_filter3
• barnard_number_points_filter2
• barnard_number_points_filter1
• barnard_optical_depth_broadband
• michalsky_solar_constant_broadband
• barnard_angstrom_exponent
• michalsky_badflag_broadband
• michalsky_number_points_filter5
• michalsky_number_points_filter4
• michalsky_number_points_filter6
• michalsky_number_points_filter1
• michalsky_number_points_filter3
• michalsky_number_points_filter2
• michalsky_solar_constant_sdist_broadband

NSA/SKYRAD/C1 - Frosting/Condensation

The down_long_hemisp1 varied up to 40 W/m^2 higher than down_long_hemisp2 during the 
affected time periods. Cold temperatures reported by the IRT suggest the issue is with PIR1.  
Icing or frost on PIR1 or within the ventilator may be to blame but ops reports can't 
substantiate this. Data from PIR1 should be avoided during these suspect time periods.

• down_long_hemisp1_min
• down_long_hemisp1_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• down_long_hemisp1_max

• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist

NSA/MWR/C1 - Elevated noise

The data have high noise levels.

• 31.4 GHz sky brightness temperature(tbsky31)
• sky23
• Total water vapor along LOS path(vap)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• sky31

• vaptip
• tipsky23
• tipsky31
• tbskytip31
• tbskytip23

NSA/MFRSR/C1 - Shadowband Misalignment

Shading issue was present in the early morning and late in the day, near those times when 
the sun was lowest in the sky.  Issue was resolved sometime on 06/07/2010

• michalsky_lnI_broadband
• michalsky_lnI_filter1
• michalsky_lnI_filter2
• michalsky_lnI_filter6
• michalsky_lnI_filter5
• michalsky_lnI_filter4
• michalsky_lnI_filter3
• barnard_lnI_filter6
• barnard_lnI_filter5
• barnard_lnI_filter4
• barnard_lnI_filter3
• barnard_lnI_filter2
• barnard_lnI_filter1

• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• hemisp_narrowband_filter2_raw
• diffuse_hemisp_broadband_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• diffuse_hemisp_narrowband_filter3_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• diffuse_hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter5_raw
• hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter5_raw
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• diffuse_hemisp_narrowband_filter4_raw
• direct_horizontal_broadband
• hemisp_broadband_raw
• diffuse_hemisp_narrowband_filter1_raw
• diffuse_hemisp_broadband
• hemisp_broadband
• hemisp_narrowband_filter1_raw
• hemisp_narrowband_filter4_raw
• diffuse_hemisp_narrowband_filter2_raw
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6

• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• direct_diffuse_ratio_filter1
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter5
• direct_diffuse_ratio_filter2
• direct_diffuse_ratio_filter3
• direct_diffuse_ratio_broadband
• direct_horizontal_broadband
• hemisp_broadband
• direct_diffuse_ratio_filter6
• diffuse_hemisp_broadband
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)

• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• diffuse_hemisp_narrowband_filter2_raw
• direct_horizontal_narrowband_filter4
• diffuse_hemisp_narrowband_filter3_raw
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• diffuse_hemisp_broadband
• diffuse_hemisp_narrowband_filter6_raw
• hemisp_narrowband_filter2_raw
• hemisp_narrowband_filter1_raw
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• diffuse_hemisp_narrowband_filter4_raw
• variability_flag
• Aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• Aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• Aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• Aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• hemisp_narrowband_filter3_raw
• Aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• hemisp_narrowband_filter5_raw
• Radiation, shortwave, diffuse hemispheric irradiance, 500 nm wavelength(diffuse_hemisp_narrowband_filter2)
• Radiation, shortwave, diffuse hemispheric irradiance, 415 nm wavelength(diffuse_hemisp_narrowband_filter1)
• Radiation, shortwave, diffuse hemispheric irradiance, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• hemisp_broadband
• Radiation, shortwave, diffuse hemispheric irradiance, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Total optical depth direct narrowband filter 5(total_optical_depth_filter5)
• Total optical depth direct narrowband filter 4(total_optical_depth_filter4)
• hemisp_broadband_raw
• Total optical depth direct narrowband filter 1(total_optical_depth_filter1)
• Total optical depth direct narrowband filter 3(total_optical_depth_filter3)
• Total optical depth direct narrowband filter 2(total_optical_depth_filter2)
• hemisp_narrowband_filter4_raw
• diffuse_hemisp_narrowband_filter5_raw
• direct_horizontal_broadband
• angstrom_exponent
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• direct_diffuse_ratio_filter6
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• direct_diffuse_ratio_filter5
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• direct_diffuse_ratio_filter2
• direct_diffuse_ratio_filter1
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter3
• diffuse_hemisp_broadband_raw
• direct_diffuse_ratio_broadband
• diffuse_hemisp_narrowband_filter1_raw
• hemisp_narrowband_filter6_raw
• Io_filter4
• Io_filter3
• Io_filter5
• Io_filter2
• Io_filter1

• michalsky_optical_depth_broadband
• barnard_optical_depth_filter1
• barnard_optical_depth_filter4
• barnard_optical_depth_filter5
• barnard_optical_depth_filter2
• barnard_optical_depth_filter3
• barnard_optical_depth_filter6
• michalsky_angstrom_exponent
• michalsky_optical_depth_filter2
• michalsky_optical_depth_filter1
• michalsky_optical_depth_filter4
• michalsky_optical_depth_filter3
• michalsky_optical_depth_filter6
• michalsky_optical_depth_filter5
• barnard_optical_depth_broadband
• barnard_angstrom_exponent

NSA/MWR/C1 - Missing data

Data are missing and unrecoverable.

• 31.4 GHz sky brightness temperature(tbsky31)
• Temperature, Sky Infra-Red(sky_ir_temp)
• sky23
• tkxc
• Total water vapor along LOS path(vap)
• alt
• tkbb
• bbn23
• base_time
• tkair
• bb23
• sky31
• tnd_nom31
• Temperature, brightness, longwave(ir_temp)
• bbn31
• lon
• tnd23
• tknd
• tnd_nom23
• bb31
• time_offset
• wet_window
• lat
• Total liquid water along LOS path(liq)
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd31
• tc23
• actel
• tc31
• actaz

• lat
• tnd_nom23
• bb31
• tnd31I
• liqtip
• wet_window
• bbn31
• r31
• tkair
• tnd_nom31
• tknd
• lon
• tc23
• r23
• bbn23
• tkxc
• tnd23
• tc31
• actel
• tkbb
• alt
• tbskytip31
• actaz
• vaptip
• bb23
• tnd23I
• tipsky31
• time_offset
• tipsky23
• base_time
• tbskytip23
• tnd31