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/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/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.

• direct_diffuse_ratio_filter2
• direct_diffuse_ratio_filter1
• solar_zenith_angle
• direct_diffuse_ratio_filter4
• direct_diffuse_ratio_filter3
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)
• direct_diffuse_ratio_filter6
• 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
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• computed_cosine_correction_filter1
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• computed_cosine_correction_filter2
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• hemisp_broadband
• computed_cosine_correction_filter3
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• computed_cosine_correction_filter4
• computed_cosine_correction_filter5
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(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
• Radiation, shortwave, hemispheric irradiance, 500 nm wavelength(hemisp_narrowband_filter2)
• Radiation, shortwave, hemispheric irradiance, 615 nm wavelength(hemisp_narrowband_filter3)
• Radiation, shortwave, hemispheric irradiance, 673 nm wavelength(hemisp_narrowband_filter4)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter5)
• Radiation, shortwave, hemispheric irradiance, 870 nm wavelength(hemisp_narrowband_filter6)
• alltime_hemisp_narrowband_filter2
• alltime_hemisp_narrowband_filter1
• 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
• Radiation, shortwave, hemispheric irradiance, 415 nm wavelength(hemisp_narrowband_filter1)

• Raw data stream - documentation not supported

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)