HFE/MWR/M1 - Insufficient calibration stability

The noise diode temperature suddenly jumped to > 60 C after a power outage. Following 
additional power problems the noise diode injection temperature drifted fast and the 
radiometer was not able to calibrate properly.

Data during the indicated time periods are poorly calibrated and sometimes erratic. Users 
should be aware that the accuracy of the measurements is dramatically degraded. 

Users can use the microwave profiler (MWRP) data to supplement the MWR data.

• Temperature correction coefficient at 23.8 GHz(tc23)
• MWR column precipitable water vapor(vap)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• (tknd)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• Averaged total liquid water along LOS path(liq)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)

• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• (tknd)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)

HFE/MWRP/M1 - Reprocess: Bias in LWP retrievals

Since local radiosondes were not available, radiosondes from a different site were used to 
develop retrieval coefficients. LWP retrievals are biased in the summer months 
(June-September).  Data in May and December are not affected.

Additional analysis will be conducted to derive new retrieval coefficients and the data 
will be reprocessed.

• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Retrieved liquid water path(liquidWaterPath)

HFE/MFRSR/M1 - Shading problem

It looks like there could be a shading problem beginning on 20080826 that lasts until 
20081013.  Affected data range from sunrise until about 0400 UTC.

• Ratio of direct_normal_narrowband_filter2 to diffuse_hemisp_narrowband_filter2(direct_diffuse_ratio_filter2)
• Ratio of direct_normal_narrowband_filter1 to diffuse_hemisp_narrowband_filter1(direct_diffuse_ratio_filter1)
• Solar zenith angle(solar_zenith_angle)
• Ratio of direct_normal_narrowband_filter4 to diffuse_hemisp_narrowband_filter4(direct_diffuse_ratio_filter4)
• Ratio of direct_normal_narrowband_filter3 to diffuse_hemisp_narrowband_filter3(direct_diffuse_ratio_filter3)
• Narrowband Hemispheric Irradiance, Filter 1(hemisp_narrowband_filter1)
• Ratio of direct_normal_narrowband_filter6 to diffuse_hemisp_narrowband_filter6(direct_diffuse_ratio_filter6)
• Air mass(airmass)
• Ratio of direct_normal_narrowband_filter5 to diffuse_hemisp_narrowband_filter5(direct_diffuse_ratio_filter5)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)
• Ratio of direct_normal_broadband to diffuse_hemisp_broadband(direct_diffuse_ratio_broadband)
• Dummy altitude for Zeb(alt)
• cosine correction, west to east, broadband channel(cosine_correction_we_broadband)
• cosine correction, west to east, filter6(cosine_correction_we_filter6)
• Time offset of tweaks from base_time(time_offset)
• cosine correction, west to east, filter3(cosine_correction_we_filter3)
• cosine correction, west to east, filter2(cosine_correction_we_filter2)
• cosine correction, west to east, filter5(cosine_correction_we_filter5)
• cosine correction, west to east, filter4(cosine_correction_we_filter4)
• cosine correction, west to east, filter1(cosine_correction_we_filter1)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Alltime Hemispheric Broadband Irradiance(alltime_hemisp_broadband)
• lon(lon)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Normalized filter function data, filter 5, wavelength value obtained during
  bench calibrations(wavelength_filter5)
• Normalized filter function data, filter 4, wavelength value obtained during
  bench calibrations(wavelength_filter4)
• Normalized filter function data, filter 6, wavelength value obtained during
  bench calibrations(wavelength_filter6)
• Normalized filter function data, filter 1, wavelength value obtained during
  bench calibrations(wavelength_filter1)
• Normalized filter function data, filter 2, wavelength value obtained during
  bench calibrations(wavelength_filter2)
• Normalized filter function data, filter 3, wavelength value obtained during
  bench calibrations(wavelength_filter3)
• base time(base_time)
• cosine correction, south to north, broadband channel(cosine_correction_sn_broadband)
• Data Logger Supply Voltage(logger_volt)
• Cosine correction of filter1 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter1)
• Cosine correction of filter3 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter3)
• Cosine correction of filter2 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter2)
• Cosine correction of filter5 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter5)
• lat(lat)
• Cosine correction of filter4 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter4)
• Cosine correction applied to direct_horizontal_broadband(computed_cosine_correction_broadband)
• Cosine correction of filter6 diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_filter6)
• Normalized filter function data, filter 6, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter6)
• Normalized filter function data, filter 4, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter4)
• Normalized filter function data, filter 5, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter5)
• Normalized filter function data, filter 2, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter2)
• Normalized filter function data, filter 3, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter3)
• Normalized filter function data, filter 1, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter1)
• Second Detector Temperature(head_temp2)
• angle of incidence during cosine bench measurements(bench_angle)
• Cosine correction applied to direct_horizontal_narrowband_filter1(computed_cosine_correction_filter1)
• Narrowband Hemispheric Irradiance, Filter 3(hemisp_narrowband_filter3)
• Cosine correction applied to direct_horizontal_narrowband_filter2(computed_cosine_correction_filter2)
• Narrowband Hemispheric Irradiance, Filter 2(hemisp_narrowband_filter2)
• Cosine correction applied to direct_horizontal_narrowband_filter3(computed_cosine_correction_filter3)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Narrowband Hemispheric Irradiance, Filter 5(hemisp_narrowband_filter5)
• Cosine correction applied to direct_horizontal_narrowband_filter4(computed_cosine_correction_filter4)
• Narrowband Hemispheric Irradiance, Filter 4(hemisp_narrowband_filter4)
• Cosine correction applied to direct_horizontal_narrowband_filter5(computed_cosine_correction_filter5)
• Cosine correction applied to direct_horizontal_narrowband_filter6(computed_cosine_correction_filter6)
• Narrowband Hemispheric Irradiance, Filter 6(hemisp_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Cosine correction of broadband diffuse, assuming Rayleigh sky at 45 deg zenith
  angle(diffuse_correction_broadband)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• Logger panel temperature(logger_temp)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
• cosine correction, south to north, filter4(cosine_correction_sn_filter4)
• cosine correction, south to north, filter3(cosine_correction_sn_filter3)
• cosine correction, south to north, filter2(cosine_correction_sn_filter2)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• cosine correction, south to north, filter1(cosine_correction_sn_filter1)
• Alltime Narrowband Hemispheric Irradiance, Filter 3(alltime_hemisp_narrowband_filter3)
• Nominal calibration factor, applied to broadband data(nominal_calibration_factor_broadband)
• Alltime Narrowband Hemispheric Irradiance, Filter 4(alltime_hemisp_narrowband_filter4)
• Alltime Narrowband Hemispheric Irradiance, Filter 5(alltime_hemisp_narrowband_filter5)
• Alltime Narrowband Hemispheric Irradiance, Filter 6(alltime_hemisp_narrowband_filter6)
• Elevation Angle(elevation_angle)
• cosine correction, south to north, filter6(cosine_correction_sn_filter6)
• cosine correction, south to north, filter5(cosine_correction_sn_filter5)
• Alltime Narrowband Hemispheric Irradiance, Filter 2(alltime_hemisp_narrowband_filter2)
• Alltime Narrowband Hemispheric Irradiance, Filter 1(alltime_hemisp_narrowband_filter1)
• Nominal calibration factor, applied to filter5 data(nominal_calibration_factor_filter5)
• Nominal calibration factor, applied to filter4 data(nominal_calibration_factor_filter4)
• Nominal calibration factor, applied to filter6 data(nominal_calibration_factor_filter6)
• Detector Temperature(head_temp)
• time(time)
• Nominal calibration factor, applied to filter1 data(nominal_calibration_factor_filter1)
• Nominal calibration factor, applied to filter3 data(nominal_calibration_factor_filter3)
• Azimuth angle(azimuth_angle)
• Nominal calibration factor, applied to filter2 data(nominal_calibration_factor_filter2)

• Logger panel temperature(logger_temp)
• Narrowband Hemispheric Irradiance, Filter 1(hemisp_narrowband_filter1_raw)
• Second Detector Temperature(head_temp2)
• lat(lat)
• time(time)
• Diffuse Narrowband Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2_raw)
• lon(lon)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Dummy altitude for Zeb(alt)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Alltime Hemispheric Broadband Irradiance(alltime_hemisp_broadband)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• Narrowband Hemispheric Irradiance, Filter 3(hemisp_narrowband_filter3_raw)
• Narrowband Hemispheric Irradiance, Filter 2(hemisp_narrowband_filter2_raw)
• Narrowband Hemispheric Irradiance, Filter 6(hemisp_narrowband_filter6_raw)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• base time(base_time)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• Diffuse Narrowband Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4_raw)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Diffuse Hemispheric Broadband Irradiance(diffuse_hemisp_broadband_raw)
• Narrowband Hemispheric Irradiance, Filter 5(hemisp_narrowband_filter5_raw)
• Hemispheric Broadband Irradiance(hemisp_broadband_raw)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Data Logger Supply Voltage(logger_volt)
• Diffuse Narrowband Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3_raw)
• Diffuse Narrowband Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6_raw)
• Narrowband Hemispheric Irradiance, Filter 2(hemisp_narrowband_filter2)
• Narrowband Hemispheric Irradiance, Filter 3(hemisp_narrowband_filter3)
• Narrowband Hemispheric Irradiance, Filter 4(hemisp_narrowband_filter4)
• Narrowband Hemispheric Irradiance, Filter 5(hemisp_narrowband_filter5)
• Alltime Narrowband Hemispheric Irradiance, Filter 2(alltime_hemisp_narrowband_filter2)
• Narrowband Hemispheric Irradiance, Filter 6(hemisp_narrowband_filter6)
• Alltime Narrowband Hemispheric Irradiance, Filter 1(alltime_hemisp_narrowband_filter1)
• Hemispheric Irradiance, MFRSR(hemisp_broadband)
• Alltime Narrowband Hemispheric Irradiance, Filter 5(alltime_hemisp_narrowband_filter5)
• Alltime Narrowband Hemispheric Irradiance, Filter 6(alltime_hemisp_narrowband_filter6)
• Diffuse Narrowband Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1_raw)
• Alltime Narrowband Hemispheric Irradiance, Filter 3(alltime_hemisp_narrowband_filter3)
• Alltime Narrowband Hemispheric Irradiance, Filter 4(alltime_hemisp_narrowband_filter4)
• Time offset of tweaks from base_time(time_offset)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Detector Temperature(head_temp)
• Diffuse Narrowband Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5_raw)
• Narrowband Hemispheric Irradiance, Filter 4(hemisp_narrowband_filter4_raw)
• Narrowband Hemispheric Irradiance, Filter 1(hemisp_narrowband_filter1)

• null(Raw data stream - documentation not supported)

HFE/MWR/M1 - Missing data

Data are missing and unrecoverable.

• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Time offset of tweaks from base_time(time_offset)
• Mixer kinetic (physical) temperature(tkxc)
• Dummy altitude for Zeb(alt)
• Sky brightness temperature at 31.4 GHz(tbsky31)
• 31.4 GHz blackbody(bb31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Sky brightness temperature at 23.8 GHz(tbsky23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• MWR column precipitable water vapor(vap)
• Temperature correction coefficient at 31.4 GHz(tc31)
• (tknd)
• Ambient temperature(tkair)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• lat(lat)
• Averaged total liquid water along LOS path(liq)
• base time(base_time)
• lon(lon)
• 31.4 GHz sky signal(sky31)
• time(time)
• Sky Infra-Red Temperature(sky_ir_temp)

• 31.4 GHz sky signal(tipsky31)
• 23.8 GHz Blackbody signal(bb23)
• base time(base_time)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• 31.4 GHz blackbody(bb31)
• 23.8 GHz sky signal(tipsky23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Ambient temperature(tkair)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• 31.4 GHz goodness-of-fit coefficient(r31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• lat(lat)
• time(time)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Actual Azimuth(actaz)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Dummy altitude for Zeb(alt)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• Actual elevation angle(actel)
• (tknd)
• Blackbody kinetic temperature(tkbb)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz blackbody+noise injection signal(bbn23)