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.

• tc23
• Total water vapor along LOS path(vap)
• tnd31
• tc31
• tknd
• tnd_nom31
• tkxc
• 31.4 GHz sky brightness temperature(tbsky31)
• Total liquid water along LOS path(liq)
• tnd23
• Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
• tnd_nom23

• tbsky31tip
• tc31
• tnd23
• tnd_nom23
• tnd23I
• tnd31I
• tbsky23tip
• tc23
• tkxc
• tnd_nom31
• tknd
• tnd31
• liqtip
• vaptip

HFE/ECOR/M1 - Sonic failure

The sonic datastream were "garbled", possibly associated with a serial line damage to the 
LI-7500 serial port or the Versalogic SBC serial port. Garbled data condition existed 
through 10/09/08 0030 GMT followed by missing data through 10/12/08 0230 GMT.

• atm_pres
• rotated variance v(var_rot_v)
• rotated variance w(var_rot_w)
• real_lv
• Pressure, condensation, at altitude, RUC model output(cp)
• rotated variance u(var_rot_u)
• mean_cooler
• alt
• rotated covariance wc(cvar_rot_wc)
• rotated covariance wt(cvar_rot_wt)
• wind_spd
• real_cp
• Corrected sensible heat flux(h)
• k
• wind_dir
• n_good_w
• real_mr
• mean_v
• n_good_v
• mean_w
• n_good_u
• Mean sonic temperature (t), i.e. virtual temperature(mean_t)
• n_good_t
• rotated covariance wq(cvar_rot_wq)
• mean_u
• n_good_q
• Mean H2O density(mean_q)
• kurt_c
• time
• temp_irga
• Mean CO2 density(mean_c)
• lv
• base_time
• covaraince vc(cvar_vc)
• covariance uc(cvar_uc)
• covariance vq(cvar_vq)
• covariance uq(cvar_uq)
• lat
• covariance uv(cvar_uv)
• n_spk_c
• covariance vw(cvar_vw)
• covariance uw(cvar_uw)
• covariance ut(cvar_ut)
• rho
• phi
• standard deviation of wind elevation angle(std_elev)
• covariance vt(cvar_vt)
• covariance wc(cvar_wc)
• real_rho
• Latent heat flux(lv_e)
• n_spk_t
• n_spk_u
• n_spk_v
• n_spk_w
• covariance tc(cvar_tc)
• covaraince wq(cvar_wq)
• n_good_c
• n_spk_q
• covariance tq(cvar_tq)
• n_bad_irga
• covariance wt(cvar_wt)
• n_bad_son_ic
• standard deviation of wind direction(std_wind_dir)
• n_bad_irga_light
• time_offset
• mean_rot_w
• skew_c
• mean_rot_v
• Mean horizontal wind speed(mean_rot_u)
• elev
• skew_w
• skew_u
• mean_spk_c
• friction velocity(ustar)
• skew_v
• mean_spk_q
• skew_t
• skew_q
• n_bad_q
• mean_spk_w
• mean_spk_v
• lon
• mean_spk_u
• mean_spk_t
• n_bad_c
• Water vapor mixing ratio observed by the Raman lidar(mr)
• rotated covariance vq(cvar_rot_vq)
• rotated covariance vt(cvar_rot_vt)
• n_bad_v
• variance of variable c(var_c)
• n_bad_u
• n_bad_t
• covariance qc(cvar_qc)
• rotated covariance vw(cvar_rot_vw)
• n_bad_w
• kurt_w
• kurt_t
• kurt_u
• kurt_v
• rotated covariance vc(cvar_rot_vc)
• variance of variable q(var_q)
• kurt_q
• variance of variable w(var_w)
• variance of variable v(var_v)
• variance of variable u(var_u)
• variance of variable t(var_t)
• rotated covariance uq(cvar_rot_uq)
• rotated covariance ut(cvar_rot_ut)
• rotated covariance uw(cvar_rot_uw)
• rotated covariance uv(cvar_rot_uv)
• CO2 flux(fc)
• rotated covariance uc(cvar_rot_uc)

HFE/MET/M1 -  Wind speed data contain offset due to induced voltage

The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.

• Wind speed vector mean(wspd_vec_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)

HFE/MWRHF/M1 - 150-GHz data drop out

The sky brightness temperature at 150 GHz (tbsky150) dropped to zero at 12:29 GMT on 
20080804 and stayed flat lined until 23:40 GMT on 20081002.

• Sky brightness temperature (150 GHz)(tbsky150)

HFE/AOS/M1 - No sub 1 micron data

The aerosol size switching impactors were stuck in the sub 10 micron mode. So all aerosol 
is sub 10 um.

• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer blue channel, 1(Bbs_B_Wet_1um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Ref. Humidograph
  nephelometer blue chann(Bbs_B_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, Humidograph nephelometer blue
  channel, 1 um particle dia(Bs_B_Wet_1um_Neph3W_2)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_G_Dry_1um_PSAP3W_1)
• Aerosol total light scattering coefficient, Ref. Humidograph nephelometer red
  channel, 1 um particle(Bs_R_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, Ref. Humidograph nephelometer blue
  channel, 1 um particl(Bs_B_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, Ref. Humidograph
  nephelometer red channe(Bbs_R_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer green channel,(Bbs_G_Wet_1um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer red channel, 1(Bbs_R_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer red
  channel, 1 um particle diam(Bs_R_Wet_1um_Neph3W_2)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_B_Dry_1um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
• Aerosol total light scattering coefficient, Ref. Humidograph nephelometer green
  channel, 1 um partic(Bs_G_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, Humidograph nephelometer green
  channel, 1 um particle di(Bs_G_Wet_1um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Ref. Humidograph
  nephelometer green chan(Bbs_G_Dry_1um_Neph3W_1)

HFE/AOS/M1 - Humidifier failure

The humidifier either wasn't scanning or the wet nephelometer was flooded with water.

• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer green channel,(Bbs_G_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer green
  channel, 10 um particle d(Bs_G_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer green channel,(Bbs_G_Wet_1um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer blue channel, 1(Bbs_B_Wet_1um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer red channel, 1(Bbs_R_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer blue
  channel, 10 um particle di(Bs_B_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer blue channel, 1(Bbs_B_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, Humidograph
  nephelometer red channel, 10(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer blue
  channel, 1 um particle dia(Bs_B_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer red
  channel, 1 um particle diam(Bs_R_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer red
  channel, 10 um particle dia(Bs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, Humidograph nephelometer green
  channel, 1 um particle di(Bs_G_Wet_1um_Neph3W_2)

HFE/AOS/M1 - CPC data missing

The CPC wasn't installed until July 22nd when the mentor visited the site.

• Condensation Nuclei Concentration Number(N_CPC_1)

HFE/AOS/M1 - CCN missing

A power regulator on the CCN circuit board failed. The mentor replaced it and it was up 
and working on 7/25/2008.

• CCN_laser_current
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• CCN_FirstStageMonitorVoltage
• CCN_ss_calc
• CCN_T_sample
• CCN_T_TEC1
• CCN_T_TEC3
• CCN_T_TEC2
• CCN_Q_sheath
• CCN_T_nafion
• Cloud condensation nuclei number density(N_CCN)
• CCN_P_sample
• CCN_dT_TEC3_TEC1_StdDev
• CCN_T_inlet
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• CCN_ProportionalValveVoltage
• CCN_temp_unstable_flag
• CCN_Q_sample
• CCN_Temperature_Gradient
• AOS CCN number concentration by bin(N_CCN_dN)
• CCN_T_OPC
• CCN_ss_set

HFE/AOS/M1 - PSAP data missing

The PSAP was disconnected during this time period.

• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_B_Dry_10um_PSAP3W_1)
• Absorption coefficient, red wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_R_Dry_10um_PSAP3W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_G_Dry_10um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_G_Dry_1um_PSAP3W_1)

HFE/MPL/M1 - Frosting/Condensation

On various days during the China deployment, condensation accumulated on the view port 
window of the MPL and compromised its capability to detect clouds.  This problem most often 
occurred during nighttime hours from May through early September.  

During the listed times, cloud retrievals and aerosol profiles should be considered 
doubtful or in error.

The dates/times of occurrence are:
16:00-23:59 GMT on 05/18
17:00-22:00 GMT on 05/23
20:00-22:00 GMT on 05/25
15:00-23:59 GMT on 06/07
17:00-23:59 GMT on 06/08
15:00-23:00 GMT on 06/09
14:00-18:00 GMT on 06/18
18:00-21:00 GMT on 06/21
14:00-16:00 GMT on 06/23
16:00-21:00 GMT on 06/27
17:00-20:00 GMT on 06/28
      22:00 GMT on 06/29
19:00-23:00 GMT on 06/30
13:30-22:30 GMT on 07/02
16:00-17:30 GMT on 07/03 
20:30-22:00 GMT on 07/03
21:30-22:30 GMT on 07/05
13:00-22:00 GMT on 07/06
17:00-18:00 GMT on 07/07
21:00-22:30 GMT on 07/07
16:00-23:59 GMT on 07/10
11:00-23:00 GMT on 07/11
18:00-23:00 GMT on 07/12
15:00-16:00 GMT on 07/13
18:00-23:59 GMT on 07/14
18:00-21:00 GMT on 07/15
17:30-23:00 GMT on 07/16
17:00-23:00 GMT on 07/17
13:00-23:30 GMT on 07/20
18:00-23:00 GMT on 07/24
21:00-23:00 GMT on 07/25
21:00-22:30 GMT on 07/27
12:00-23:59 GMT on 08/02
16:00-21:30 GMT on 08/03
16:00-23:00 GMT on 08/04
14:00-22:30 GMT on 08/05
19:00-23:00 GMT on 08/07
19:00-21:30 GMT on 08/08
15:00-23:30 GMT on 08/10
17:30-23:30 GMT on 08/12
14:00-15:00 GMT on 08/14
16:30-22:30 GMT on 08/14
21:30-22:30 GMT on 08/17
12:00-23:59 GMT on 08/18
12:00-13:30 GMT on 08/19
20:00-23:30 GMT on 08/19
15:00-23:59 GMT on 08/20
11:00-23:59 GMT on 08/22
11:00-23:30 GMT on 08/23
12:00-23:30 GMT on 08/25
13:00-23:30 GMT on 08/26
16:30-23:59 GMT on 08/27
17:00-23:00 GMT on 08/31
15:00-23:59 GMT on 09/01
15:00-20:00 GMT on 09/02
19:30-23:59 GMT on 09/05
16:30-22:30 GMT on 09/09
19:30-23:59 GMT on 09/12
20:30-23:59 GMT on 09/15
14:00-16:30 GMT on 09/16
19:00-23:59 GMT on 09/16
20:30-23:59 GMT on 10/29
22:00-23:59 GMT on 11/01
20:00-23:59 GMT on 11/23
00:00-02:00 GMT on 11/24

• range
• background_signal_std_cross_pol
• Attenuated backscatter, copol(signal_return_co_pol)
• Attenuated backscatter, cross pol(signal_return_cross_pol)
• range_offset
• range_bins
• energy_monitor
• aqc_signal_return_co_pol
• aqc_signal_return_cross_pol
• base_time
• background_signal_co_pol
• polarization_control_voltage_co_pol
• shots_per_sample
• lat
• max_altitude
• dead_time_corrected
• background_signal_cross_pol
• num_bins
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
• range_bin_width
• laser_temp
• nsamples_cross_pol_average
• scope_temp
• polarization_control_voltage_cross_pol
• detector_temp
• Pressure, associated geometric height, at altitude, NGM model output(height)
• time_offset
• nsamples_co_pol_average
• background_signal_std_co_pol
• lon
• time
• alt
• Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
• num_channels
• pulse_rep

• shots_per_sample
• num_channels
• dead_time_corrected
• range
• range_bin_width
• Attenuated backscatter, cross pol(signal_return_cross_pol)
• polarization_control_voltage_cross_pol
• detector_temp
• alt
• background_signal_cross_pol
• background_signal_std_co_pol
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Preliminary cloud base height above ground level, co-pol(preliminary_cbh_co_pol)
• lon
• aqc_signal_return_co_pol
• max_altitude
• lat
• polarization_control_voltage_co_pol
• scope_temp
• time_offset
• background_signal_std_cross_pol
• pulse_rep
• background_signal_co_pol
• aqc_signal_return_cross_pol
• nsamples_co_pol_average
• num_bins
• Preliminary cloud base height above ground level, cross-pol(preliminary_cbh_cross_pol)
• nsamples_cross_pol_average
• range_bins
• energy_monitor
• time
• base_time
• Attenuated backscatter, copol(signal_return_co_pol)
• laser_temp
• range_offset

• range
• num_channels
• polarization_control
• num_bins
• scope_temp
• lon
• detector_temp
• shots_per_avg
• polarization_control_voltage
• alt
• pulse_rep
• Pressure, associated geometric height, at altitude, NGM model output(height)
• background_signal_std
• lat
• base_time
• energy_monitor
• range_bins
• max_altitude
• laser_temp
• Preliminary cloud base height(preliminary_cbh)
• signal_return
• range_bin_width
• time
• time_offset
• range_offset
• background_signal
• range_bin_time
• dead_time_corrected

HFE/SKYRAD/M1 - IRT bias

The sky temperatures exhibited a positive bias compared to AERI, especially when < 230K. 
This is indicative of an incorrect emissivity setting (to compensate for the gold mirror) 
or a poor calibration. A similar problem with the same instrument occurred during the FKB 
deployment that was attributed to water vapor.

• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

HFE/MWRHF/M1 - Frosting/Condensation

The heater module was installed on 6/4/2008. Before this time there is condensation on the 
window during night time and early morning. On 8/18 the heater appears to have failed 
and nighttime condensation re-occurred on the radome during conditions of high humidity.

Users can identify the segments affected by observing a smooth steady increase in the 
brightness temperature (BT). BT values can increase to more than 250 K and then smoothly 
decrease. The RH during these events is usually above 70%. Users should disregard data 
affected by condensation.

• Sky brightness temperature (90 GHz)(tbsky90)
• Sky brightness temperature (150 GHz)(tbsky150)

HFE/MWRHF/M1 - Calibration updates

The MWRHF calibration algorithm updates the calibration parameters every time a new 
successful tip curve is acquired. 

This results in small jumps (1-2 K) in the brightness temperatures each time calibration 
is updated. During times of frequent calibrations the data appear discontinuous with short 
data segments interrupted by small jumps.

• Sky brightness temperature (90 GHz)(tbsky90)
• Sky brightness temperature (150 GHz)(tbsky150)

HFE/MWRHF/M1 - Rain sensor failure

The rain sensor failed and the rain flag was always on.  When the rain flag is on the 
radiometer does not perform tip curves. The rain sensor was replaced 8/4.

• Rain flag(rain_flag)

HFE/MET/M1 - Intermittent barometer failure

Intermittent barometer failure occurred throughout the deployment.  We were unable to 
pinpoint the cause of the failure.  Typically one or two minutes of missing data occurred 
every few days.

Since pressure data is typically invariant over 1 minute, linear interpolation should be 
fine to fill in missing data.

• Barometric Pressure(atmos_pressure)

HFE/MET/M1 - Intermittent PWD data

The Present Weather Detector had intermittent missing values throughout this deployment.  
Missing values occurred almost everyday, usually just one or two minutes per day.

• pwd_cumul_rain
• pwd_pw_code_15min
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• pwd_err_code
• pwd_precip_rate_mean_1min
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_pw_code_inst
• pwd_pw_code_1hr

HFE/MET/M1 - ORG measuring ice crystals or fog

The ORG was measuring consistent values for long periods of time.  Typically this is 
indicative of fog, ice crystals in the air or poor performance of the lens heaters.

• ORG precipitation rate mean(org_precip_rate_mean)

HFE/MET/M1 - Induced voltage on wind speed sensor cable

The cable for the wind monitor is not a twisted pair shielded cable.  This caused an 
induced voltage on the wind sensor wires from the wind direction measurement excitation 
voltage.  A small offset is added into the wind speeds.  This value varies.  Most frequently 
the values of 0.49, 0.588 and 0.686 m/s were added into the wind speed.  On 11/27/2008 the 
value jumped to 0.98 m/s for most of the day.

• Wind speed vector mean(wspd_vec_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)

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.

• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Liquid water path, from brightness temperatures using statistical retrieval(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
• 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, nominal wavelength is 415 nm*(hemisp_narrowband_filter1)
• direct_diffuse_ratio_filter6
• Ratio of direct_normal_narrowband_filter5 to diffuse_hemisp_narrowband_filter5(direct_diffuse_ratio_filter5)
• airmass
• offset_filter6
• offset_filter5
• offset_filter4
• offset_filter3
• offset_filter2
• offset_filter1
• direct_diffuse_ratio_broadband
• alt
• cosine_correction_we_broadband
• cosine_correction_we_filter6
• time_offset
• cosine_correction_we_filter3
• cosine_correction_we_filter2
• cosine_correction_we_filter5
• cosine_correction_we_filter4
• cosine_correction_we_filter1
• direct_horizontal_broadband
• alltime_hemisp_broadband
• lon
• wavelength_filter5
• Direct Normal Broadband Irradiance, broadband scale applied(direct_normal_broadband)
• wavelength_filter4
• wavelength_filter6
• wavelength_filter1
• wavelength_filter2
• wavelength_filter3
• base_time
• cosine_correction_sn_broadband
• logger_volt
• diffuse_correction_filter1
• diffuse_correction_filter3
• diffuse_correction_filter2
• diffuse_correction_filter5
• lat
• diffuse_correction_filter4
• diffuse_correction_filter6
• computed_cosine_correction_broadband
• normalized_transmittance_filter6
• normalized_transmittance_filter4
• normalized_transmittance_filter5
• normalized_transmittance_filter2
• normalized_transmittance_filter3
• normalized_transmittance_filter1
• head_temp2
• bench_angle
• Narrowband hemispheric irradiance, filter 3, nominal wavelength is 608 nm*(hemisp_narrowband_filter3)
• computed_cosine_correction_filter1
• Narrowband hemispheric irradiance, filter 2, nominal wavelength is 500 nm*(hemisp_narrowband_filter2)
• computed_cosine_correction_filter2
• Narrowband hemispheric irradiance, filter 5, nominal wavelength is 860 nm*(hemisp_narrowband_filter5)
• Hemispheric broadband irradiance*(hemisp_broadband)
• computed_cosine_correction_filter3
• Narrowband hemispheric irradiance, filter 4, nominal wavelength is 660 nm*(hemisp_narrowband_filter4)
• computed_cosine_correction_filter4
• computed_cosine_correction_filter5
• Narrowband hemispheric irradiance, filter 6, nominal wavelength is 935 nm*(hemisp_narrowband_filter6)
• computed_cosine_correction_filter6
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• 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_hemisp_broadband
• direct_horizontal_narrowband_filter6
• logger_temp
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• direct_horizontal_narrowband_filter3
• offset_broadband
• direct_horizontal_narrowband_filter4
• direct_horizontal_narrowband_filter5
• 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, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• 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, 615 nm wavelength(diffuse_hemisp_narrowband_filter3)
• cosine_correction_sn_filter4
• cosine_correction_sn_filter3
• cosine_correction_sn_filter2
• cosine_correction_sn_filter1
• cosine_solar_zenith_angle
• alltime_hemisp_narrowband_filter3
• nominal_calibration_factor_broadband
• alltime_hemisp_narrowband_filter4
• alltime_hemisp_narrowband_filter5
• alltime_hemisp_narrowband_filter6
• elevation_angle
• cosine_correction_sn_filter6
• cosine_correction_sn_filter5
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter1
• nominal_calibration_factor_filter5
• nominal_calibration_factor_filter4
• nominal_calibration_factor_filter6
• head_temp
• time
• nominal_calibration_factor_filter1
• nominal_calibration_factor_filter3
• azimuth_angle
• nominal_calibration_factor_filter2

• logger_temp
• hemisp_narrowband_filter1_raw
• head_temp2
• lat
• time
• diffuse_hemisp_narrowband_filter2_raw
• lon
• 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, 673 nm wavelength(diffuse_hemisp_narrowband_filter4)
• Radiation, shortwave, diffuse hemispheric irradiance, 870 nm wavelength(diffuse_hemisp_narrowband_filter5)
• Radiation, shortwave, diffuse hemispheric irradiance, 940 nm wavelength(diffuse_hemisp_narrowband_filter6)
• direct_horizontal_narrowband_filter1
• direct_horizontal_narrowband_filter2
• alt
• direct_horizontal_narrowband_filter3
• direct_horizontal_narrowband_filter4
• alltime_hemisp_broadband
• direct_horizontal_narrowband_filter5
• direct_horizontal_narrowband_filter6
• hemisp_narrowband_filter3_raw
• hemisp_narrowband_filter2_raw
• hemisp_narrowband_filter6_raw
• offset_broadband
• base_time
• offset_filter4
• offset_filter5
• offset_filter6
• diffuse_hemisp_narrowband_filter4_raw
• offset_filter1
• offset_filter2
• offset_filter3
• diffuse_hemisp_broadband_raw
• hemisp_narrowband_filter5_raw
• hemisp_broadband_raw
• diffuse_hemisp_broadband
• logger_volt
• diffuse_hemisp_narrowband_filter3_raw
• diffuse_hemisp_narrowband_filter6_raw
• Narrowband hemispheric irradiance, filter 2, nominal wavelength is 500 nm*(hemisp_narrowband_filter2)
• Narrowband hemispheric irradiance, filter 3, nominal wavelength is 608 nm*(hemisp_narrowband_filter3)
• Narrowband hemispheric irradiance, filter 4, nominal wavelength is 660 nm*(hemisp_narrowband_filter4)
• Narrowband hemispheric irradiance, filter 5, nominal wavelength is 860 nm*(hemisp_narrowband_filter5)
• Narrowband hemispheric irradiance, filter 6, nominal wavelength is 935 nm*(hemisp_narrowband_filter6)
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter1
• Hemispheric broadband irradiance*(hemisp_broadband)
• alltime_hemisp_narrowband_filter5
• alltime_hemisp_narrowband_filter6
• alltime_hemisp_narrowband_filter3
• diffuse_hemisp_narrowband_filter1_raw
• alltime_hemisp_narrowband_filter4
• time_offset
• direct_horizontal_broadband
• head_temp
• diffuse_hemisp_narrowband_filter5_raw
• hemisp_narrowband_filter4_raw
• Narrowband hemispheric irradiance, filter 1, nominal wavelength is 415 nm*(hemisp_narrowband_filter1)

• Raw data stream - documentation not supported

HFE/NFOV/M1 - Over-ranging data

The instrument was incorrectly installed with an incorrect range setting in the logger 
program.  The program for lamp calibrating the instrument was used, and not the operational 
program. The scale ranges are different, and this resulted in over-ranging conditions 
when the signal exceeded the upper end of the measurement scale.  Affected times are 
centered around solar noon, nominally +/- one-hour around solar noon.  This lasted until 
mid-Aug, when the highest signals were no longer exceeding the logger range.

• raw_counts_673nm
• raw_counts_870nm
• Calibrated Zenith Radiance, 673nm(radiance_673nm)
• Calibrated Zenith Radiance, 870nm(radiance_870nm)

HFE/MWRHF/M1 - Elevated noise in 150 GHz data

The noise level of the 150 GHz channel was about 4 times higher than expected, likely due 
to failure of the noise diode.  Disregard the 150 GHz data.

• Sky brightness temperature (150 GHz)(tbsky150)

HFE/MWR/M1 - Missing data

Data are missing and unrecoverable.

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

• tipsky31
• bb23
• base_time
• tc31
• tnd31I
• lon
• time_offset
• bb31
• tipsky23
• tbsky23tip
• tc23
• tkair
• wet_window
• tbsky31tip
• r31
• tnd23
• tnd_nom23
• lat
• time
• tnd23I
• actaz
• bbn31
• alt
• r23
• tnd_nom31
• tkxc
• actel
• tknd
• tkbb
• tnd31
• liqtip
• vaptip
• bbn23

HFE/MET/S1 - Barometer missing

All spare barometers and the working barometer for this supplemental site were damaged 
during shipment.  They were sent in for repair and recalibration.

• Barometric Pressure(atmos_pressure)

HFE/MET/S1 - Optical Rain Gage Failed

All data collected by the ORG is of no use.  The ORG had failed and any data collected was 
not indicative of the current weather.

• precip_rate_max
• precip_rate_sd
• Rain, surface, 1-min avg(precip_rate_mean)
• org_carrier_mean
• precip_rate_min

HFE/MET/S1 - Wind Data Incorrect

The wind sensor became disconnected and no wind speed or direction data were collected.

• wind_dir_sd
• wind_spd_arith_min
• Wind speed, lower, 1-min avg(wind_spd_arith_avg)
• wind_spd_arith_max
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• wind_spd_arith_sd
• Vector-averaged Wind Direction(wind_dir_vec_avg)

HFE/ECOR/M1 - Flux Data Incorrect For Some Wind Directions

For some wind directions the horizontal fetch was not representative of the fields 
surrounding the AMF. Therefore, for the wind direction range 191-349 degrees, the fluxes are 
affected by insufficient fetch, and surfaces, buildings, and vegetation that are not similar 
to the local field conditions.

• Corrected sensible heat flux(h)
• friction velocity(ustar)
• CO2 flux(fc)
• Latent heat flux(lv_e)

HFE/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields

Attribute serial_number: In most cases, this field is not representative of the actual 
serial number of the instrument because the value did not change when an instrument changed 
locations or was replaced with a spare.
   
Variable sum_backscatter: An out-of-range condition for the "sum of detected and 
normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 
0.0999 /srad.

• sum_backscatter

HFE/VCEIL/S1 - Incorrect serial_number and sum_backscatter fields

Attribute serial_number: In most cases, this field is not representative of the actual 
serial number of the instrument because the value did not change when an instrument changed 
locations or was replaced with a spare.
   
Variable sum_backscatter: An out-of-range condition for the "sum of detected and 
normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 
0.0999 /srad.

• sum_backscatter

HFE/WACR/M1 - Reprocessed: Reflectivity and Height Offsets

The instrument vendor informed us of a range (height) offset of 13 m and provided updated 
reflectivity calibration.  All values reported for 'Reflectivity' were approximately 3 dB 
too low.   In addition, the Reflectivity in the first and fourth range gates (starting 
from the surface) needed to be further corrected by an additional 2.7 and -0.9 dB, 
respectively. The 'height' field values were 13.33 m too low.  The data were reprocessed to 
correct these problems.

The hfewacrM1.b1 data were reprocessed and archived in October 2010.  The
hfewacrspeccmaskcopolM1.a0 and hfewacrspeccmaskxpolM1.a0 data were reprocessed and
archived in January and July 2012.

• heights
• Cloud, reflectivity, at altitude(Reflectivity)

• heights
• Cloud, reflectivity, at altitude(Reflectivity)

• heights
• Cloud, reflectivity, at altitude(Reflectivity)

HFE/AOS/M1 - Data processing problem

The AOS data was reprocessed for the AMF, SGP and NSA sites. There was an error in the 
processing of the corrections for the PSAP absorption signal such that a low pass filter was 
implemented for the scattering data used in these corrections.The difference between the 
corrected and previous data is < 0.05 Mm-1 (below the instrument detection limit) and 
should not have a significant effect on the previous data. Data will be reprocessed at a 
later time when more significant changes to the data processing are implemented.

• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
• Absorption coefficient, red wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_R_Dry_10um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_G_Dry_1um_PSAP3W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_G_Dry_10um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_B_Dry_10um_PSAP3W_1)

• Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_1um_PSAP3W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_G_Dry_10um_PSAP3W_1)
• Absorption coefficient, green wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_G_Dry_1um_PSAP3W_1)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_B_Dry_10um_PSAP3W_1)
• Absorption coefficient, red wavelength, 3 wavelength PSAP, low RH, 10 um size
  cut(Ba_R_Dry_10um_PSAP3W_1)
• Absorption coefficient, blue wavelength, 3 wavelength PSAP, low RH, 1 um size
  cut(Ba_B_Dry_1um_PSAP3W_1)
• Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)

• Aerosol light absorption coefficient, green channel, 1 um particle diameter(Ba_G_Dry_1um_PSAP1W_1)
• Aerosol light absorption coefficient, green channel, 10 um particle diameter(Ba_G_Dry_10um_PSAP1W_1)

HFE/AOS/M1 - CPC and CCN data questionable

The CPC slowly clogged and the signal declined until the instrument was cleaned at which 
point the signal would increase. The data is still a good relative measure of the daily 
changes in the CN concentration, but the absolute value may be too low.

The mentor was unable to monitor the flow rate and operation in the CCN during operation. 
The relative changes in CCN with %ss are likely fine, but the absolute values may be too 
low or too high. Dust was prevalent at the site and likely contributed to the CCN signal 
such that large dust particles appeared as droplets.

• Cloud condensation nuclei number density(N_CCN)
• Condensation Nuclei Concentration Number(N_CPC_1)

• CCN_Q_sheath
• Cloud condensation nuclei number density(N_CCN)
• CCN_Q_sample
• AOS CCN number concentration by bin(N_CCN_dN)

HFE/TSI/M1 - Data processing problem

Values of count_opaque and count_thin are reals but should be integers 
(units = pixels).

• count_opaque
• count_thin

HFE/WACR/M1 - WACR antenna diameter incorrect

The global attribute 'antenna_diameter' has an incorrect value.  The correct antenna 
diameter is 48" or 1.22 m.

• base_time

• base_time