NSA/C1 data loss due to cut fiber optic cable

The fiber optic line connecting the MET TWR to the data collection
facility was accidentally cut during snow removal.  Data are 
unrecoverable.

• Precipitation rate(precip_rate)
• One Minute Visibility(one_minute_visibility)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• ten_min_pw_code_out_of_range_error
• one_minute_PW_code
• one_min_pw_code_out_of_range_error
• pws_read_timeout_error
• lon
• alt
• one_hour_PW_code
• pws_serial_error
• one_hour_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• Ten Minute Visibility(ten_minute_visibility)
• ten_minute_PW_code
• ten_minute_vis_out_of_range_error
• Cumulative Snow(cumulative_snow)
• filename
• time_offset
• cumul_liq_water_equiv_out_of_range_err
• lat
• one_minute_vis_out_of_range_error
• present_weather_sensor_NWS_code
• precip_rate_out_of_range_error
• base_time

• Atmospheric pressure(atmos_pressure)
• Maximum Wind Direction(wind_dir_max)
• Mean Vapor Pressure(vap_pres_mean)
• alt
• wind_spd_sd
• Maximum Vapor Pressure(vap_pres_max)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• base_time
• relh_sd
• dew_pt_temp_sd
• lon
• win_spd_out_of_range_error
• temp_out_of_range_error
• dew_pt_temp_out_of_range_error
• temp_hardware_error
• filename
• vap_pres_out_of_range_error
• Temperature minimum(temp_min)
• Temperature maximum(temp_max)
• Relative humidity maximum(relh_max)
• time_offset
• Maximum Dew Point Temperature(dew_pt_temp_max)
• win_dir_out_of_range_error
• vap_pres_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Relative humidity minimum(relh_min)
• internal_temp_out_of_range_error
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• atmos_pressure_out_of_range_error
• Minimum Wind Speed(wind_spd_min)
• wind_dir_sd
• Mean Wind Speed(wind_spd_mean)
• temp_sd
• Minimum Wind Direction(wind_dir_min)
• relh_out_of_range_error
• atmos_pressure_read_timeout_error
• atmos_pressure_PTB_serial_error
• read_timeout_count
• Temperature mean(temp_mean)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Minimum Vapor Pressure(vap_pres_min)
• Relative humidity mean(relh_mean)
• Maximum Wind Speed(wind_spd_max)
• lat
• internal_voltage_out_of_range_error
• dew_pt_hardware_error

• precip_no_data_error
• base_time
• precip_read_timeout_error
• precip_NWS_code
• lat
• precip_out_of_range_error
• Precipitation rate(precip_rate)
• alt
• precip_daily_accum
• precip_serial_error
• lon
• time_offset
• filename

NSA/PWS/C1 - Present Weather Sensor Calibration/Checks

During the listed period the Barrow Present Weather Sensor was being
checked and calibrated and the data was incorrect.  The calibration was off more than 3% 
previous to the re-calibration.

• ten_min_pw_code_out_of_range_error
• Precipitation rate(precip_rate)
• one_minute_vis_out_of_range_error
• one_min_pw_code_out_of_range_error
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• one_hour_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• Ten Minute Visibility(ten_minute_visibility)
• cumul_liq_water_equiv_out_of_range_err
• One Minute Visibility(one_minute_visibility)
• Cumulative Snow(cumulative_snow)
• precip_rate_out_of_range_error
• ten_minute_vis_out_of_range_error

• Ten Minute Visibility(ten_minute_visibility)
• One Minute Visibility(one_minute_visibility)
• cumul_snow_out_of_range_error
• ten_minute_vis_out_of_range_error
• Cumulative Snow(cumulative_snow)
• one_min_pw_code_out_of_range_error
• cumul_liq_water_equiv_out_of_range_err
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Precipitation rate(precip_rate)
• ten_min_pw_code_out_of_range_error
• precip_rate_out_of_range_error

NSA/METTWR/C1 - Met Tower Data Incorrect During Calibrations/Changeouts

Met Tower Data was incorrect during this period while sensor changeouts and calibrations 
were accomplished.

• Maximum Wind Direction(wind_dir_max)
• Mean Vapor Pressure(vap_pres_mean)
• wind_spd_sd
• Maximum Vapor Pressure(vap_pres_max)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• relh_sd
• dew_pt_temp_sd
• win_spd_out_of_range_error
• temp_out_of_range_error
• dew_pt_temp_out_of_range_error
• temp_hardware_error
• vap_pres_out_of_range_error
• Temperature minimum(temp_min)
• Relative humidity maximum(relh_max)
• Temperature maximum(temp_max)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• win_dir_out_of_range_error
• vap_pres_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_sd
• Mean Wind Speed(wind_spd_mean)
• temp_sd
• Minimum Wind Direction(wind_dir_min)
• relh_out_of_range_error
• Temperature mean(temp_mean)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Minimum Vapor Pressure(vap_pres_min)
• Relative humidity mean(relh_mean)
• Maximum Wind Speed(wind_spd_max)
• dew_pt_hardware_error

• Maximum Wind Speed(wind_spd_max)
• Mean Wind Speed(wind_spd_mean)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• temp_hardware_error
• dew_pt_temp_out_of_range_error
• Temperature maximum(temp_max)
• dew_pt_temp_sd
• vap_pres_sd
• Temperature mean(temp_mean)
• Relative humidity mean(relh_mean)
• Minimum Vapor Pressure(vap_pres_min)
• relh_sd
• Temperature minimum(temp_min)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• wind_spd_sd
• temp_out_of_range_error
• Maximum Vapor Pressure(vap_pres_max)
• Maximum Wind Direction(wind_dir_max)
• Minimum Wind Direction(wind_dir_min)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_out_of_range_error
• relh_out_of_range_error
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• dew_pt_hardware_error
• wind_spd_out_of_range_error
• temp_sd
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• wind_dir_sd
• vap_pres_out_of_range_error
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Maximum Dew Point Temperature(dew_pt_temp_max)

NSA/PWS/C1 - Calibration drift

The calibration of the sensor drifted downwards slightly more than 3% during the more than 
two years in between calibrations.  The drift had no significant impact on the data 
produced.  Note: the period of this DQR extends back prior to 20000503 when the datastream 
was named nsapwsC1.a0.

• Cumulative Snow(cumulative_snow)
• Ten Minute Visibility(ten_minute_visibility)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Precipitation rate(precip_rate)
• One Minute Visibility(one_minute_visibility)

NSA/METTWR/C1 - C1 SPURIOUS INFORMATION IN DATA HEADER

There is an attribute for read_timeout_count that should not be included.  
The affected prtion of the header is: read_timeout_count:details = '0 = no error, 1 = 
error'  
User should disregard this attribute information in the header.

• read_timeout_count

NSA/METTWR/C1 - C1 WIND SPEED DATA QUESTIONABLE

The anemometers located at all 4 levels (2m, 10m, 20m, and 40m) are heated anemometers.  
The thermistors controlling the amount of power applied to the cups of the anemometers 
failed.  This caused too much power to be sent to the heating elements.  The cups bubbled 
and, in some cases, completely melted through.

• Minimum Wind Speed(wind_spd_min)
• wind_spd_sd
• Mean Wind Speed(wind_spd_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Maximum Wind Speed(wind_spd_max)

• Maximum Wind Speed(wind_spd_max)
• wind_spd_out_of_range_error
• Mean Wind Speed(wind_spd_mean)
• wind_spd_sd
• Minimum Wind Speed(wind_spd_min)
• Vector-averaged Wind Speed(wind_spd_vec_avg)

NSA/METTWR/C1 - C1 WIND DIRECTION DATA SUSPECT

The wind direction sensor at the 10m level and 20m level became frozen.  The senor at the 
10m level became frozen on July 25 2001.  The date that the 20m level became frozen is 
unknown but occurred after the 10m level became frozen.  Both sensors froze in such a way 
as to consistently report wind direction values out of the south.

• wind_dir_sd
• win_spd_out_of_range_error
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Direction(wind_dir_max)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• win_dir_out_of_range_error

• wind_dir_out_of_range_error
• wind_dir_sd
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Maximum Wind Direction(wind_dir_max)
• Minimum Wind Direction(wind_dir_min)

NSA/METTWRC1 - METTWRCQ DATA REPORTED AS -9999

Due to local power outages caused by winter storms, the Bridgeview collection program 
became corrupted.  All tower data and associated instruments on the tower reported as -9999.

• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Ten Minute Visibility(ten_minute_visibility)
• present_weather_sensor_NWS_code
• Precipitation rate(precip_rate)
• one_min_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• one_minute_PW_code
• One Minute Visibility(one_minute_visibility)
• ten_minute_vis_out_of_range_error
• one_hour_PW_code
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• ten_minute_PW_code
• cumul_liq_water_equiv_out_of_range_err
• precip_rate_out_of_range_error
• ten_min_pw_code_out_of_range_error
• pws_read_timeout_error
• pws_serial_error
• Cumulative Snow(cumulative_snow)

• Maximum Vapor Pressure(vap_pres_max)
• relh_sd
• dew_pt_temp_sd
• win_spd_out_of_range_error
• temp_out_of_range_error
• dew_pt_temp_out_of_range_error
• temp_hardware_error
• vap_pres_out_of_range_error
• win_dir_out_of_range_error
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_sd
• temp_sd
• relh_out_of_range_error
• atmos_pressure_read_timeout_error
• atmos_pressure_PTB_serial_error
• Temperature mean(temp_mean)
• serial_port_error
• Maximum Wind Speed(wind_spd_max)
• dew_pt_hardware_error
• Atmospheric pressure(atmos_pressure)
• Maximum Wind Direction(wind_dir_max)
• Mean Vapor Pressure(vap_pres_mean)
• wind_spd_sd
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Temperature minimum(temp_min)
• Temperature maximum(temp_max)
• Relative humidity maximum(relh_max)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• vap_pres_sd
• internal_temp_out_of_range_error
• atmos_pressure_out_of_range_error
• Mean Wind Speed(wind_spd_mean)
• Minimum Wind Direction(wind_dir_min)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Minimum Vapor Pressure(vap_pres_min)
• Relative humidity mean(relh_mean)
• internal_voltage_out_of_range_error

• Ten Minute Visibility(ten_minute_visibility)
• one_min_pw_code_out_of_range_error
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• pws_serial_error
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Precipitation rate(precip_rate)
• ten_minute_vis_out_of_range_error
• one_hour_PW_code
• precip_rate_out_of_range_error
• One Minute Visibility(one_minute_visibility)
• Cumulative Snow(cumulative_snow)
• cumul_liq_water_equiv_out_of_range_err
• ten_min_pw_code_out_of_range_error
• pws_read_timeout_error
• cumul_snow_out_of_range_error
• present_weather_sensor_NWS_code
• ten_minute_PW_code
• one_minute_PW_code

• Maximum Wind Speed(wind_spd_max)
• Mean Wind Speed(wind_spd_mean)
• temp_hardware_error
• dew_pt_temp_sd
• vap_pres_sd
• Temperature mean(temp_mean)
• Relative humidity mean(relh_mean)
• atmos_pressure_out_of_range_error
• relh_sd
• Minimum Dew Point Temperature(dew_pt_temp_min)
• wind_spd_sd
• temp_out_of_range_error
• Maximum Wind Direction(wind_dir_max)
• Maximum Vapor Pressure(vap_pres_max)
• Minimum Wind Direction(wind_dir_min)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_out_of_range_error
• internal_temp_out_of_range_error
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• wind_spd_out_of_range_error
• temp_sd
• Mean Vapor Pressure(vap_pres_mean)
• wind_dir_sd
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• internal_voltage_out_of_range_error
• Mean Dew Point Temperature(dew_pt_temp_mean)
• dew_pt_temp_out_of_range_error
• Temperature maximum(temp_max)
• atmos_pressure_PTB_serial_error
• Minimum Vapor Pressure(vap_pres_min)
• read_timeout_count
• Temperature minimum(temp_min)
• Atmospheric pressure(atmos_pressure)
• relh_out_of_range_error
• dew_pt_hardware_error
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• atmos_pressure_read_timeout_error
• vap_pres_out_of_range_error
• Maximum Dew Point Temperature(dew_pt_temp_max)

• precip_read_timeout_error
• Precipitation rate(precip_rate)
• precip_serial_error
• precip_no_data_error
• precip_NWS_code
• precip_out_of_range_error
• precip_daily_accum

• precip_out_of_range_error
• Precipitation rate(precip_rate)
• precip_NWS_code
• precip_daily_accum
• precip_no_data_error
• precip_serial_error
• precip_read_timeout_error

NSA/METTWRC1 - METTWRC1 NO DATA COLLECTED FROM TOWER

Power outage caused fatal errors in the Bridgeview collection program.  No data was 
ingested from the tower and sensors located on the tower.

• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Ten Minute Visibility(ten_minute_visibility)
• present_weather_sensor_NWS_code
• Precipitation rate(precip_rate)
• one_min_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• one_minute_PW_code
• One Minute Visibility(one_minute_visibility)
• ten_minute_vis_out_of_range_error
• one_hour_PW_code
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• ten_minute_PW_code
• cumul_liq_water_equiv_out_of_range_err
• precip_rate_out_of_range_error
• ten_min_pw_code_out_of_range_error
• pws_read_timeout_error
• pws_serial_error
• Cumulative Snow(cumulative_snow)

• Maximum Vapor Pressure(vap_pres_max)
• relh_sd
• dew_pt_temp_sd
• win_spd_out_of_range_error
• temp_out_of_range_error
• dew_pt_temp_out_of_range_error
• temp_hardware_error
• vap_pres_out_of_range_error
• win_dir_out_of_range_error
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_sd
• temp_sd
• relh_out_of_range_error
• atmos_pressure_read_timeout_error
• atmos_pressure_PTB_serial_error
• Temperature mean(temp_mean)
• serial_port_error
• Maximum Wind Speed(wind_spd_max)
• dew_pt_hardware_error
• Atmospheric pressure(atmos_pressure)
• Maximum Wind Direction(wind_dir_max)
• Mean Vapor Pressure(vap_pres_mean)
• wind_spd_sd
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Temperature minimum(temp_min)
• Temperature maximum(temp_max)
• Relative humidity maximum(relh_max)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• vap_pres_sd
• internal_temp_out_of_range_error
• atmos_pressure_out_of_range_error
• Mean Wind Speed(wind_spd_mean)
• Minimum Wind Direction(wind_dir_min)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Minimum Vapor Pressure(vap_pres_min)
• Relative humidity mean(relh_mean)
• internal_voltage_out_of_range_error

• Ten Minute Visibility(ten_minute_visibility)
• one_min_pw_code_out_of_range_error
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• pws_serial_error
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Precipitation rate(precip_rate)
• ten_minute_vis_out_of_range_error
• one_hour_PW_code
• precip_rate_out_of_range_error
• One Minute Visibility(one_minute_visibility)
• Cumulative Snow(cumulative_snow)
• cumul_liq_water_equiv_out_of_range_err
• ten_min_pw_code_out_of_range_error
• pws_read_timeout_error
• cumul_snow_out_of_range_error
• present_weather_sensor_NWS_code
• ten_minute_PW_code
• one_minute_PW_code

• Maximum Wind Speed(wind_spd_max)
• Mean Wind Speed(wind_spd_mean)
• temp_hardware_error
• dew_pt_temp_sd
• vap_pres_sd
• Temperature mean(temp_mean)
• Relative humidity mean(relh_mean)
• atmos_pressure_out_of_range_error
• relh_sd
• Minimum Dew Point Temperature(dew_pt_temp_min)
• wind_spd_sd
• temp_out_of_range_error
• Maximum Wind Direction(wind_dir_max)
• Maximum Vapor Pressure(vap_pres_max)
• Minimum Wind Direction(wind_dir_min)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_out_of_range_error
• internal_temp_out_of_range_error
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• wind_spd_out_of_range_error
• temp_sd
• Mean Vapor Pressure(vap_pres_mean)
• wind_dir_sd
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• internal_voltage_out_of_range_error
• Mean Dew Point Temperature(dew_pt_temp_mean)
• dew_pt_temp_out_of_range_error
• Temperature maximum(temp_max)
• atmos_pressure_PTB_serial_error
• Minimum Vapor Pressure(vap_pres_min)
• read_timeout_count
• Temperature minimum(temp_min)
• Atmospheric pressure(atmos_pressure)
• relh_out_of_range_error
• dew_pt_hardware_error
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• atmos_pressure_read_timeout_error
• vap_pres_out_of_range_error
• Maximum Dew Point Temperature(dew_pt_temp_max)

• precip_read_timeout_error
• Precipitation rate(precip_rate)
• precip_serial_error
• precip_no_data_error
• precip_NWS_code
• precip_out_of_range_error
• precip_daily_accum

• precip_out_of_range_error
• Precipitation rate(precip_rate)
• precip_NWS_code
• precip_daily_accum
• precip_no_data_error
• precip_serial_error
• precip_read_timeout_error

NSA/METTWR/C1 - Wind Speed data intermittently bad

Wind speed at 20m level icing up and wind speed values are intermittently
0 m/s, lower than other sensors and good at times.  Heater failure on sensor
that prevents icing.

• Minimum Wind Speed(wind_spd_min)
• wind_spd_sd
• Mean Wind Speed(wind_spd_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Maximum Wind Speed(wind_spd_max)

• Maximum Wind Speed(wind_spd_max)
• wind_spd_out_of_range_error
• Mean Wind Speed(wind_spd_mean)
• wind_spd_sd
• Minimum Wind Speed(wind_spd_min)
• Vector-averaged Wind Speed(wind_spd_vec_avg)

NSA/METTWR/C1 - Data missing due to Power Failure

From 020606.0150-0204, the met twr data (all levels) are all -9999
due to a power failure.  The collection program was shut down from
0205-1930, so no data were collected.  And from 1931-020607.1707, 
the data are all -9999 again due to the power failure.

• Atmospheric pressure(atmos_pressure)
• Maximum Wind Direction(wind_dir_max)
• Mean Vapor Pressure(vap_pres_mean)
• alt
• wind_spd_sd
• Maximum Vapor Pressure(vap_pres_max)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• base_time
• dew_pt_temp_sd
• relh_sd
• lon
• win_spd_out_of_range_error
• temp_out_of_range_error
• dew_pt_temp_out_of_range_error
• temp_hardware_error
• vap_pres_out_of_range_error
• Temperature minimum(temp_min)
• Temperature maximum(temp_max)
• Relative humidity maximum(relh_max)
• time_offset
• Maximum Dew Point Temperature(dew_pt_temp_max)
• win_dir_out_of_range_error
• vap_pres_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Relative humidity minimum(relh_min)
• internal_temp_out_of_range_error
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• atmos_pressure_out_of_range_error
• Minimum Wind Speed(wind_spd_min)
• wind_dir_sd
• Mean Wind Speed(wind_spd_mean)
• temp_sd
• Minimum Wind Direction(wind_dir_min)
• relh_out_of_range_error
• atmos_pressure_read_timeout_error
• atmos_pressure_PTB_serial_error
• Temperature mean(temp_mean)
• serial_port_error
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Minimum Vapor Pressure(vap_pres_min)
• Relative humidity mean(relh_mean)
• Maximum Wind Speed(wind_spd_max)
• lat
• internal_voltage_out_of_range_error
• dew_pt_hardware_error

• internal_voltage_out_of_range_error
• time_offset
• Maximum Wind Speed(wind_spd_max)
• base_time
• Mean Wind Speed(wind_spd_mean)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• temp_hardware_error
• dew_pt_temp_out_of_range_error
• Temperature maximum(temp_max)
• atmos_pressure_PTB_serial_error
• dew_pt_temp_sd
• vap_pres_sd
• Temperature mean(temp_mean)
• read_timeout_count
• Relative humidity mean(relh_mean)
• Minimum Vapor Pressure(vap_pres_min)
• atmos_pressure_out_of_range_error
• alt
• relh_sd
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Temperature minimum(temp_min)
• wind_spd_sd
• temp_out_of_range_error
• Maximum Vapor Pressure(vap_pres_max)
• Maximum Wind Direction(wind_dir_max)
• Minimum Wind Direction(wind_dir_min)
• Minimum Wind Speed(wind_spd_min)
• wind_dir_out_of_range_error
• internal_temp_out_of_range_error
• Atmospheric pressure(atmos_pressure)
• relh_out_of_range_error
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• dew_pt_hardware_error
• wind_spd_out_of_range_error
• temp_sd
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• wind_dir_sd
• lat
• atmos_pressure_read_timeout_error
• lon
• vap_pres_out_of_range_error
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Maximum Dew Point Temperature(dew_pt_temp_max)

NSA/METTIPTWR/C2 - Data missing due to Power Failure

No data were collected due to a power failure.

• Raw data stream - documentation not supported

• Mean Dew Point Temperature(dew_pt_temp_mean)
• Temperature maximum(temp_max)
• base_time
• lat
• Minimum Wind Direction(wind_dir_min)
• temp_sd_diff
• temp_hardware_error
• Maximum Wind Direction(wind_dir_max)
• temp_sd
• Minimum Dew Point Temperature(dew_pt_temp_min)
• wind_spd_sd
• temp_out_of_range_error
• read_timeout_count
• vap_pres_out_of_range_error
• relh_out_of_range_error
• internal_temp_out_of_range_error
• Relative humidity mean(relh_mean)
• temp_min_diff
• temp_mean_diff
• atmos_pressure_out_of_range_error
• Maximum Dew Point Temperature(dew_pt_temp_max)
• alt
• Temperature minimum(temp_min)
• atmos_pressure_read_timeout_error
• Mean Wind Speed(wind_spd_mean)
• Minimum Wind Speed(wind_spd_min)
• Maximum Wind Speed(wind_spd_max)
• dew_pt_temp_sd
• wind_dir_out_of_range_error
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• lon
• wind_dir_sd
• internal_voltage_out_of_range
• temp_max_diff
• atmos_pressure_PTB_serial_error
• Relative humidity maximum(relh_max)
• dew_pt_hardware_error
• time_offset
• Temperature mean(temp_mean)
• Atmospheric pressure(atmos_pressure)
• wind_spd_out_of_range_error
• relh_sd
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Vapor Pressure(vap_pres_min)
• dew_pt_temp_out_of_range_error
• Maximum Vapor Pressure(vap_pres_max)
• Mean Vapor Pressure(vap_pres_mean)
• vap_pres_sd

• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Mean Wind Speed(wind_spd_mean)
• alt
• time_offset
• vap_pres_sd
• Relative humidity mean(relh_mean)
• internal_voltage_out_of_range
• vap_pres_out_of_range_error
• temp_sd
• temp_out_of_range_error
• relh_sd
• temp_max_diff
• read_timeout_count
• wind_spd_out_of_range_error
• wind_spd_sd
• Atmospheric pressure(atmos_pressure)
• lon
• internal_temp_out_of_range_error
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Temperature maximum(temp_max)
• Temperature minimum(temp_min)
• wind_dir_out_of_range_error
• atmos_pressure_PTB_serial_error
• atmos_pressure_out_of_range_error
• temp_min_diff
• temp_mean_diff
• Temperature mean(temp_mean)
• temp_hardware_error
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Maximum Vapor Pressure(vap_pres_max)
• lat
• dew_pt_hardware_error
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Maximum Wind Direction(wind_dir_max)
• Minimum Wind Direction(wind_dir_min)
• Minimum Vapor Pressure(vap_pres_min)
• dew_pt_temp_out_of_range_error
• dew_pt_temp_sd
• base_time
• wind_dir_sd
• Maximum Dew Point Temperature(dew_pt_temp_max)
• temp_sd_diff
• Minimum Wind Speed(wind_spd_min)
• Maximum Wind Speed(wind_spd_max)
• atmos_pressure_read_timeout_error
• relh_out_of_range_error

NSA/BMET/C2 - NSA/METTIPTOWER/C2 - C2 MET DATA MISSING

Due to unknown wiring differences and pin changes by Vaisala to their Wind Speed and 
Direction sensors, a power feedback into the QLI data collector occurred.  This caused an 
overload which shut the QLI data collector down.  Once trouble shooting pinpointed the power 
feedback, wiring diagrams were created and the differences were found.  Wiring was 
changed to prevent and remove the power feedback.

• Mean Dew Point Temperature(dew_pt_temp_mean)
• Mean Wind Speed(wind_spd_mean)
• Minimum Wind Speed(wind_spd_min)
• Maximum Wind Speed(wind_spd_max)
• dew_pt_temp_sd
• wind_dir_out_of_range_error
• Temperature maximum(temp_max)
• Minimum Wind Direction(wind_dir_min)
• temp_hardware_error
• temp_sd_diff
• Maximum Wind Direction(wind_dir_max)
• temp_sd
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• wind_spd_sd
• internal_voltage_out_of_range
• wind_dir_sd
• temp_max_diff
• Relative humidity maximum(relh_max)
• temp_out_of_range_error
• dew_pt_hardware_error
• vap_pres_out_of_range_error
• read_timeout_count
• relh_out_of_range_error
• internal_temp_out_of_range_error
• Temperature mean(temp_mean)
• Relative humidity mean(relh_mean)
• temp_min_diff
• wind_spd_out_of_range_error
• relh_sd
• temp_mean_diff
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Vapor Pressure(vap_pres_min)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• dew_pt_temp_out_of_range_error
• Maximum Vapor Pressure(vap_pres_max)
• Mean Vapor Pressure(vap_pres_mean)
• vap_pres_sd
• Temperature minimum(temp_min)

• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Mean Wind Speed(wind_spd_mean)
• Relative humidity maximum(relh_max)
• Relative humidity minimum(relh_min)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Maximum Vapor Pressure(vap_pres_max)
• dew_pt_hardware_error
• Minimum Dew Point Temperature(dew_pt_temp_min)
• vap_pres_sd
• Relative humidity mean(relh_mean)
• internal_voltage_out_of_range
• vap_pres_out_of_range_error
• temp_sd
• temp_out_of_range_error
• Maximum Wind Direction(wind_dir_max)
• relh_sd
• read_timeout_count
• temp_max_diff
• Minimum Wind Direction(wind_dir_min)
• wind_spd_out_of_range_error
• Minimum Vapor Pressure(vap_pres_min)
• dew_pt_temp_out_of_range_error
• wind_spd_sd
• dew_pt_temp_sd
• internal_temp_out_of_range_error
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Temperature maximum(temp_max)
• Temperature minimum(temp_min)
• wind_dir_out_of_range_error
• wind_dir_sd
• Maximum Dew Point Temperature(dew_pt_temp_max)
• temp_sd_diff
• temp_min_diff
• Minimum Wind Speed(wind_spd_min)
• Maximum Wind Speed(wind_spd_max)
• temp_mean_diff
• Temperature mean(temp_mean)
• temp_hardware_error
• relh_out_of_range_error

NSA/C2 - Missing met, pws, snodep data due to comm error

An error in the communication sub-routine
of the Bridgeview collection software occurred
resulting in data loss from the Snow Depth
sensor, Present Weather Sensor and the 
Barometer.

• atmos_pressure_read_timeout_error
• atmos_pressure_PTB_serial_error
• Atmospheric pressure(atmos_pressure)
• atmos_pressure_out_of_range_error

• Atmospheric pressure(atmos_pressure)
• atmos_pressure_PTB_serial_error
• atmos_pressure_out_of_range_error
• atmos_pressure_read_timeout_error

• One Minute Visibility(one_minute_visibility)
• cumul_liq_water_equiv_out_of_range_err
• one_hour_pw_code_out_of_range_error
• ten_minute_vis_out_of_range_error
• one_min_pw_code_out_of_range_error
• ten_minute_PW_code
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• precip_rate_out_of_range_error
• one_minute_PW_code
• one_hour_PW_code
• Cumulative Snow(cumulative_snow)
• pws_read_timeout_error
• base_time
• ten_min_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• pws_serial_error
• Ten Minute Visibility(ten_minute_visibility)
• Precipitation rate(precip_rate)
• present_weather_sensor_NWS_code
• one_minute_vis_out_of_range_error

• snow_depth_internal_QC
• snow_depth_serial_error
• snow_depth_read_timeout_error
• Snow Depth(snow_depth)
• snow_depth_out_of_range_error

• ten_minute_PW_code
• Cumulative Snow(cumulative_snow)
• present_weather_sensor_NWS_code
• pws_serial_error
• one_min_pw_code_out_of_range_error
• One Minute Visibility(one_minute_visibility)
• pws_read_timeout_error
• Ten Minute Visibility(ten_minute_visibility)
• one_hour_pw_code_out_of_range_error
• one_minute_PW_code
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• cumul_snow_out_of_range_error
• ten_min_pw_code_out_of_range_error
• ten_minute_vis_out_of_range_error
• cumul_liq_water_equiv_out_of_range_err
• one_minute_vis_out_of_range_error
• Precipitation rate(precip_rate)
• one_hour_PW_code
• precip_rate_out_of_range_error

NSA/METTWR/C1  -  C1/METTWR PRESSURE DATA MISSING AND INCORRECT

Starting at 0501 UTC on 05/21, pressure readings frequently are out of tolerance.  The 
read timeout value had changed from 250 ms to 150 ms.  Changed the read time out back to 250 
ms.  Unknown as to how read timeout values changed.

• Atmospheric pressure(atmos_pressure)

• Atmospheric pressure(atmos_pressure)

NSA/PWS/C1 - C1/BARROW PWS WORKING INTERMITTENTLY

The PWS worked intermittently throughout entire period.  Extensive troubleshooting located 
a broken wire in the RS-232 connector.  Contact was made intermittently allowing some 
data to be recorded.

• ten_min_pw_code_out_of_range_error
• one_hour_PW_code
• Precipitation rate(precip_rate)
• pws_read_timeout_error
• one_min_pw_code_out_of_range_error
• one_minute_vis_out_of_range_error
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• one_hour_pw_code_out_of_range_error
• cumul_snow_out_of_range_error
• pws_serial_error
• Ten Minute Visibility(ten_minute_visibility)
• one_minute_PW_code
• present_weather_sensor_NWS_code
• ten_minute_PW_code
• cumul_liq_water_equiv_out_of_range_err
• One Minute Visibility(one_minute_visibility)
• Cumulative Snow(cumulative_snow)
• ten_minute_vis_out_of_range_error
• precip_rate_out_of_range_error

• Ten Minute Visibility(ten_minute_visibility)
• One Minute Visibility(one_minute_visibility)
• pws_read_timeout_error
• cumul_snow_out_of_range_error
• ten_minute_vis_out_of_range_error
• Cumulative Snow(cumulative_snow)
• one_min_pw_code_out_of_range_error
• present_weather_sensor_NWS_code
• cumul_liq_water_equiv_out_of_range_err
• one_minute_vis_out_of_range_error
• one_hour_pw_code_out_of_range_error
• pws_serial_error
• one_hour_PW_code
• ten_minute_PW_code
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• one_minute_PW_code
• ten_min_pw_code_out_of_range_error
• Precipitation rate(precip_rate)
• precip_rate_out_of_range_error

NSA/METTWR/C1 - power outage at 40m level

40m level lost power so no data was collected from this level.

• Wind speed, mean, at 40-m height(WS40M_S_WVT)
• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• Relative humidity, average, at 40-m height(RH40M_AVG)
• Volt40M_AVG
• Temperature, air, average, at 40-m height(T40M_AVG)
• RefT40M_AVG
• WD40M_SDU_WVT
• RH40M_STD
• Temperature, dew point, average, at 40-m height(DP40M_AVG)
• T40M_STD
• Wind speed, vector-averaged, at 40-m height(WS40M_U_WVT)
• VP40M_STD
• Pressure, vapor, at 40-m height(VP40M_AVG)
• DP40M_STD

NSA/METTWR/C1 - Chilled Mirror transmit logic board chipset unsuited for Arctic 
temperatures

Data missing due to problems with manufacturer's transmit logic board chipset.  They were 
generic chips not rated for Arctic temperatures.

• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C2 - Chilled Mirror grounding and timing issues

From beginning of data stream, the chilled mirror data was intermittent at best.  Problems 
with grounding and timing issues between logging instruments caused data to be incorrect 
and at times missing.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C1 - CMH Dew Point and RH data Incorrect

The Chilled Mirror Dew Point reported negative dew point values.  This caused the RH to be 
much lower than reality also.  Compared to the 2m level the RH and dew point from the 
CMH are incorrect.  Mirror was dirty, it was removed, cleaned and recalibrated.

• CMHDP
• CMHRH

NSA/METTWR/C1 - Instrument problem, Contamination, False signal

Heavy, wet and blowing snow and ice caused measurement problems with the sonic anemometer 
mounted at the 2m level.  Erroneous readings caused both the wind speed and direction 
values to be reported anomolously.  Once the heavy, wet snow and ice stopped the readings 
returned to normal.

• SonicWD_SDU_WVT
• SonicWS_U_WVT
• SonicWS_S_WVT
• SonicS_AVG
• SonicY_AVG
• SonicWD_DU_WVT
• SonicX_AVG

NSA/METTWR/C2 - Data Incorrect during Maintenance

The 10m tower was lowered for 2-year change-out of the met sensors.  Data during this time 
is not representative.

• RefTemp_AVG
• RH2m_STD
• Wind speed, vector-averaged(WinSpeed_U_WVT)
• DP5m_STD
• Relative humidity, average, at 2-m height(RH5m_AVG)
• QLIVolt_AVG
• WinDir_SDU_WVT
• VP5m_STD
• Temperature, air, average, at 2-m height(T2m_AVG)
• T2m_STD
• Wind speed, mean(WinSpeed_S_WVT)
• Temperature, dew point, average, at 5-m height(DP5m_AVG)
• VP2m_STD
• T5m_STD
• Pressure, vapor, at 2-m height(VP2m_AVG)
• RH5m_STD
• SatVPCMH
• Relative humidity, average, at 2-m height(RH2m_AVG)
• Pressure, vapor, at 5-m height(VP5m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• Wind direction, vector-averaged(WinDir_DU_WVT)
• Temperature, air, average, at 5-m height(T5m_AVG)

NSA/METTWR/C2 -  All Data Missing or Incorrect during Maintenance

All data incorrect or missing due to change of the Serial Data multiplexer and the Vaisala 
QLI data collector during these times.

• RefTemp_AVG
• RH2m_STD
• Relative humidity, average, at 2-m height(RH5m_AVG)
• QLIVolt_AVG
• PWcod15mi
• VP5m_STD
• Precipitation Rate(PCPRate)
• CMHTemp
• T5m_STD
• VPCMH
• CMHDP
• Pressure, vapor, at 5-m height(VP5m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• Wind direction, vector-averaged(WinDir_DU_WVT)
• PWCod1hr
• batt_volt
• CumSnow
• Wind speed, vector-averaged(WinSpeed_U_WVT)
• DP5m_STD
• CumH2O
• WinDir_SDU_WVT
• CMHRH
• Temperature, air, average, at 2-m height(T2m_AVG)
• T2m_STD
• Wind speed, mean(WinSpeed_S_WVT)
• Temperature, dew point, average, at 5-m height(DP5m_AVG)
• VP2m_STD
• Pressure, atmospheric(AtmPress)
• Pressure, vapor, at 2-m height(VP2m_AVG)
• PWSAlarm
• RH5m_STD
• SatVPCMH
• InstPWCod
• Relative humidity, average, at 2-m height(RH2m_AVG)
• Visibility, 1 minute average(AvgVis1mi)
• Temperature, air, average, at 5-m height(T5m_AVG)
• Visibility, 10 minute average(AvgVis10m)

NSA/METTWR/C2 - PWS Data Suspect

Data from the PWS is suspect during these times due to problems when the system was 
re-calibrated.  System was corrected.

• PWCod1hr
• CumSnow
• PWSAlarm
• CumH2O
• PWcod15mi
• InstPWCod
• Visibility, 1 minute average(AvgVis1mi)
• Precipitation Rate(PCPRate)
• Visibility, 10 minute average(AvgVis10m)

NSA/METTWR/C1 - 20m Temperature/RH Sensor Failing

The 20m temperature and RH sensor began reading high on 20040719.
Aspirator fan failure caused a portion of the high reading.  New fan
failed to correct for all errors.  Sensor replaced on 20040908 with
recently calibrated sensor.

• DP20M_STD
• Temperature, dew point, average, at 20-m height(DP20M_AVG)
• Pressure, vapor, at 20-m height(VP20M_AVG)
• Temperature, air, average, at 20-m height(T20M_AVG)
• RH20M_STD
• Relative humidity, average, at 20-m height(RH20M_AVG)
• VP20M_STD
• T20M_STD

NSA/METTWR/C1 - Sonic - Instrument problem, Contamination, False signal

Heavy, wet and blowing snow and ice caused measurement problems with the sonic anemometer 
mounted at the 2m level.  Erroneous readings caused both the wind speed and direction 
values to be reported anomolously.	Once the heavy, wet snow and ice stopped the readings 
returned to normal.

• SonicWD_SDU_WVT
• SonicWS_U_WVT
• SonicWS_S_WVT
• SonicS_AVG
• SonicY_AVG
• SonicWD_DU_WVT
• SonicX_AVG

NSA/METTWR/C1 - Instrument problem, Frosting/Condensation

The 2m T & RH values were not in very good agreement with the CMH data or the other tower 
levels.  A failed aspirator fan caused the readings to be incorrect.

• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• Temperature, air, average, at 2-m height(T2M_AVG)
• RH2M_STD
• Relative humidity, average, at 2-m height(RH2M_AVG)
• DP2M_STD
• T2M_STD
• VP2M_STD
• Pressure, vapor, at 2-m height(VP2M_AVG)

NSA/METTWR/C2 - Instrument problem

CMH and PWS stopped reporting.  Communication cable found to be broken.

• PWCod1hr
• CumSnow
• CumH2O
• PWcod15mi
• CMHRH
• Precipitation Rate(PCPRate)
• CMHTemp
• VPCMH
• CMHDP
• PWSAlarm
• SatVPCMH
• InstPWCod
• Visibility, 1 minute average(AvgVis1mi)
• Visibility, 10 minute average(AvgVis10m)

NSA/METTWR/C1 - All 10m level Data Missing

After prolonged power outage and many power spikes during the outage all data from the 10m 
level are missing.  Blown fuse on the power supply was replaced once the temperatures 
warmed enough to allow the lowering of the tower carriages.

• Pressure, vapor, at 10-m height(VP10M_AVG)
• RH10M_STD
• T10M_STD
• Wind speed, mean, at 10-m height(WS10M_S_WVT)
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• VP10M_STD
• DP10M_STD
• WD10M_SDU_WVT
• Temperature, dew point, average, at 10-m height(DP10M_AVG)
• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• RefT10m_AVG
• Relative humidity, average, at 10-m height(RH10M_AVG)
• Temperature, air, average, at 10-m height(T10M_AVG)
• Volt10M_AVG

NSA/METTWR/C1 - Instrument problem

2m wind direction reporting only 236 degrees.  Sensor failure.

• WD2M_SDU_WVT
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/METTWR/C1 - Reprocess: Incorrect windspeed units

Power fluctuations caused the Ultrasonic wind sensor to revert to default setting of 
reporting wind speed in mph.  Setting was changed back to m/s.

• SonicWS_U_WVT
• SonicWS_S_WVT
• SonicS_AVG
• SonicY_AVG
• SonicX_AVG

NSA/METTWR/C1 - Instrument problem, Contamination, False signal

Data in error due to heavy snow during blizzard conditions.

• SonicWD_SDU_WVT
• SonicWS_U_WVT
• SonicWS_S_WVT
• SonicS_AVG
• SonicY_AVG
• SonicWD_DU_WVT
• SonicX_AVG

NSA/C1 - Site-wide power failure

The Barrow facility experienced a site-wide power failure on 12/13.  Power was restored to 
most instruments between 2250 and 2330 GMT.

• Backscatter, doppler spectrum, 915 MHz RWP(spc_amp)
• alt
• plen
• ncoh
• tditime
• bswitch
• time_offset
• nspc
• sitime
• vband
• bins
• elevation
• dly
• lon
• nheight
• sampr
• base_time
• height_t
• range_gate
• prf
• rgs
• oband
• pcbits
• vsr
• spcavetim
• ipp
• beam
• lat
• rgl
• rgf

• Eastward Wind Component(u_wind)
• lon
• nspc
• power
• avgint
• rgs
• snr3
• snr4
• snr0
• snr1
• snr2
• dly
• vvsr
• Wind direction, horizontal, at altitude, 915 MHz RWP(dir)
• oband
• tditime
• rgl
• rgf
• range_gate
• ncoh
• time_offset
• lat
• prf
• base_time
• ovsr
• azimuth1
• azimuth0
• azimuth3
• azimuth2
• Beam 2 radial wind speed(vel2)
• Beam 1 radial wind speed(vel1)
• azimuth4
• Beam 4 radial wind speed(vel4)
• Beam 3 radial wind speed(vel3)
• sampr
• Beam 0 radial wind speed(vel0)
• ipp
• nrcns4
• nrcns3
• nrcns2
• nrcns1
• nrcns0
• ncns1
• ncns0
• ncns3
• ncns2
• ncns4
• sitime
• Wind speed, horizontal, at altitude, 915 MHz RWP(spd)
• plen
• spcavetim
• alt
• nheight
• nrec0
• nrec1
• nrec2
• nrec3
• nrec4
• elevation0
• Northward Wind Component(v_wind)
• elevation2
• elevation1
• elevation4
• elevation3
• height_p
• vband
• pcbits
• bswitch

• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• AERIunitNumber
• calibratedSceneID
• timeHHMMSS
• wnum2
• Time_UTC_hours
• systemReleaseNumber
• channelNumber
• time_offset
• base_time
• alt
• Longitude
• BBsupportStructureTemp
• atmosphericRelativeHumidity
• missingDataFlag
• calibrationCBBtemp
• instrumentUnitNumber
• Latitude
• sceneMirrorAngle
• dateYYMMDD
• calibrationAmbientTemp
• atmosphericPressure
• wnum
• outsideAirTemp
• calibrationHBBtemp
• lat
• hatchOpen
• JulianDay
• sceneViewDuration
• standard_dev_mean_rad
• time
• lon
• sceneMirPosEncoderMaxDrift
• Altitude

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

• sceneMirPosEncoderMaxDrift
• skyViewStdDevRadiance675_680
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• JulianDay
• SWskyNENacceptable
• channelNumber
• calibrationAmbientTemp
• LW_HBB_NEN
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• LWskyNEN
• Latitude
• lon
• systemReleaseNumber
• skyViewStdDevRadiance985_990
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• outsideAirTemp
• wnumsum7
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum2
• wnumsum1
• wnumsum9
• wnumsum8
• HBB2minNENestimateNo1Ch1
• HBB2minNENestimateNo1Ch2
• HBBstable
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• LWresponsivity
• maxSampleStdDev
• lat
• Altitude
• dataAvailable
• instrumentUnitNumber
• time_offset
• calibrationHBBtemp
• atmosphericPressure
• LWskyNENacceptable
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• time
• calibratedSceneID
• atmosphericRelativeHumidity
• sceneViewDuration
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• sceneMirPosEncoderDrift
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• ResponsivitySpectralAveragesCh1
• ResponsivitySpectralAveragesCh2
• SkyNENCh1
• SkyNENCh2
• hatchOpen
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• SW_HBB_NEN
• sceneMirrorAngle
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• HBB2minNENestimateNo2Ch2
• HBB2minNENestimateNo2Ch1
• skyViewStdDevRadiance2510_2515
• dateYYMMDD
• alt
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• base_time
• skyViewStdDevRadiance2282_2287
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• SWskyNEN
• wnumsum11
• wnumsum12
• wnumsum13
• wnumsum14
• wnumsum10
• skyViewStdDevRadiance700_705
• SWresponsivity
• Longitude
• HBBtempDrift
• sunSensorIntensity
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• missingDataFlag
• ABBmaxTempDiff
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• HBBmaxTempDiff
• timeHHMMSS
• AERIunitNumber
• skyViewStdDevRadiance2295_2300
• frontEndFanAirTempDiff
• calibrationCBBtemp
• Time_UTC_hours
• rainSensorIntensity
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)

• base_time
• rgs
• noise
• snr
• Pressure, associated geometric height, at altitude, NGM model output(height)
• Temperature, virtual, profile, merged from 50 and 915 MHz RASS(virtual_temp)
• mdf
• smdf
• lon
• time_offset
• sampr
• Spectral Width(specw)
• alt
• ssnr
• sspecw
• lat

• lon
• Time_UTC_hours
• atmosphericPressure
• JulianDay
• sceneMirrorAngle
• hatchOpen
• outsideAirTemp
• Longitude
• dateYYMMDD
• time
• sceneViewDuration
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• sceneMirPosEncoderMaxDrift
• timeHHMMSS
• base_time
• calibrationCBBtemp
• Latitude
• calibrationHBBtemp
• missingDataFlag
• instrumentUnitNumber
• atmosphericRelativeHumidity
• systemReleaseNumber
• channelNumber
• wnum2
• lat
• BBsupportStructureTemp
• standard_dev_mean_rad
• Altitude
• wnum
• calibratedSceneID
• AERIunitNumber
• alt
• time_offset
• calibrationAmbientTemp

• range_bin_time
• background_signal
• time
• shots_summed
• lat
• voltage_15
• max_altitude
• voltage_05
• voltage_10
• pulse_rep
• instrument_temp
• detector_temp
• Pressure, associated geometric height, at altitude, NGM model output(height)
• laser_temp
• time_offset
• range_offset
• range
• filter_temp
• Preliminary cloud base height above ground level(preliminary_cbh)
• energy_monitor
• alt
• range_bins
• detector_counts
• base_time
• lon
• range_bin_width

• status_string
• Backscatter(backscatter)
• Lowest cloud base height detected.(first_cbh)
• tilt_angle
• base_time
• Second lowest cloud base height(second_cbh)
• detection_status
• alt_highest_signal
• window_contamination
• receiver_sensitivity
• Vertical visibility(vertical_visibility)
• laser_temperature
• alt
• time_offset
• filename
• lat
• laser_pulse_energy
• sum_backscatter
• status_flag
• lon
• background_light
• Third cloud base height(third_cbh)
• measurement_parameters
• range

• Pressure, associated geometric height, at altitude, NGM model output(height)
• sampr
• rgs
• lat
• lon
• base_time
• time_offset
• alt
• Backscatter, doppler spectrum, 915 MHz RWP(spc_amp)
• bins

• SNR Corrected Beam 0 Virtual Temperature(snr_virtual_temp_corr)
• ncns_virtual_temp
• SNR Beam 0 Virtual Temperature(snr_virtual_temp)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• rgs
• ncns_vert_v
• ncns_virtual_temp_corr
• time_offset
• Temperature, virtual, profile, merged from 50 and 915 MHz RASS(virtual_temp)
• Wind speed, vertical velocity, at altitude, 915 MHz RWP(vert_v)
• lat
• nrcns
• base_time
• SNR Vertical wind velocity(snr_vert_v)
• sampr
• lon
• Temperature, virtual, at altitude, 10-min cons. avg, corrected, 915 MHz RWP/RASS(virtual_temp_corr)
• avgint
• alt
• nrec

• BBcontroller2temp
• skyViewImaginaryRadiance2295_2300
• ABBtempOffset
• HBBmaxTempDiff
• skyViewImaginaryRadiance2510_2515
• detectorTemp
• coadditionsCount
• calibrationHBBtemp
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• HBBapexTemp
• skyViewStdDevRadiance985_990
• ABBviewStdDevRadiance2295_2300
• systemReleaseNumber
• skyViewStdDevRadiance2510_2515
• base_time
• ABBviewStdDevRadiance985_990
• timeHHMMSS
• sceneMirrorAngle
• LW_HBB_NEN
• spareTemp
• HBBstable
• Latitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• channelNumber
• HBBviewStdDevRadiance700_705
• outsideAirTemp
• HBBviewStdDevRadiance2510_2515
• rackAmbientTemp
• calibratedSceneID
• frontEndFanAirHeatedTemp
• HBBtempOffset
• instrumentUnitNumber
• ABBtopTemp
• skyViewImaginaryRadiance700_705
• fixed2500ohmResistor
• missingDataFlag
• time_offset
• fixed97KohmResistor
• LWskyNEN
• HBBapexTempWeight
• ABBbottomTempWeight
• expandedInterferogramSize
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• coolerCurrent
• ABBviewStdDevRadiance700_705
• HBBbottomTemp
• frontEndFanAirUnheatedTemp
• computerTemp
• lon
• LWresponsivity
• calibrationAmbientTemp
• interferometerSecondPortTemp
• skyViewStdDevRadiance700_705
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• interferometerEnclosureRelativeHumidity
• originalInterferogramSize
• HBBviewStdDevRadiance985_990
• maxSampleStdDev
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• motorDriverTemp
• SWskyNENlimit
• Longitude
• alt
• HBBviewStdDevRadiance675_680
• HBBviewStdDevRadiance2282_2287
• ABBapexTemp
• hatchOpen
• skyViewImaginaryRadiance2282_2287
• ABBbottomTemp
• AERIunitNumber
• Altitude
• LWskyNENacceptable
• sceneMirPosCount
• sceneMirrorMotorStep
• SWresponsivity
• lat
• originalLaserWavenumber
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• ABBviewStdDevRadiance675_680
• BBsupportStructureTemp
• HBBviewStdDevRadiance2295_2300
• sceneMirPosEncoder
• rainSensorIntensity
• twoMinuteNoiseEstimateFactor
• skyViewImaginaryRadiance985_990
• SCEtemp
• sceneViewDuration
• ABBviewStdDevRadiance2282_2287
• skyViewImaginaryRadiance675_680
• BBcontroller1temp
• dateYYMMDD
• HBBtopTempWeight
• airNearBBsTemp
• ABBmaxTempDiff
• HBBtempDriftLimit
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• BBcavityFactor
• coolerCompressorTemp
• sceneMirrorTemp
• coolerExpanderTemp
• coolerPowerSupplyTemp
• dataAvailable
• skyViewStdDevRadiance675_680
• Time_UTC_hours
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• HBBtempDrift
• sunSensorIntensity
• atmosphericRelativeHumidity
• sceneMirrorPosition
• ABBviewStdDevRadiance2510_2515
• atmosphericPressure
• HBBtopTemp
• skyViewStdDevRadiance2282_2287
• SWskyNENacceptable
• time
• JulianDay
• ABBapexTempWeight
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• SW_HBB_NEN
• ABBtopTempWeight
• LWskyNENlimit
• fixed12KohmResistor
• SWskyNEN
• airNearInterferometerTemp
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• mirrorMotorTemp
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• FFOVhalfAngle
• interferometerWindowTemp
• sceneMirPosEncoderDrift
• skyViewStdDevRadiance2295_2300
• HBBbottomTempWeight
• calibrationCBBtemp
• outputLaserWavenumber
• opticsCompartmentRelativeHumidity
• numberOfTerms
• frontEndFanAirTempDiff

• range_bin_time
• detector_temp
• total_counts
• scalar_sync_offset
• Pressure, associated geometric height, at altitude, NGM model output(height)
• transceiver_azimuth_angle
• time_offset
• laser_sync_offset
• Preliminary cloud base height above ground level(preliminary_cbh)
• voltage_10
• voltage_15
• voltage_05
• trigger_freq
• time
• instrument_temp
• shots_sum
• filter_temp
• Backscatter(backscatter)
• alt
• lon
• base_time
• pulse_rep
• background_signal
• deadtime_correction
• laser_scalar_sync_offset
• lat
• range
• max_altitude
• range_bin_width
• energy_monitor
• range_offset
• shots_summed
• property
• laser_temp
• transceiver_altitude_angle
• range_bins

• ReceiverNumber
• CalCheckTime
• RxCalTimeStamp
• TWTStatusCode
• DCFilterONOFF
• base_time
• NumCodeBits
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• WindowingONOFF
• NumFFT
• ReceiverMode
• GateSpacing
• NumHeights
• heights
• CalCheckLevel
• PulseWidth
• NumSpectralAverages
• SkyNoiseLevel
• Power
• DataQualityStatus
• SignalToNoiseRatio
• ClutterHeight
• ModeNum
• NumCoherentIntegrations
• MinimumDetectableReflectivity
• time_offset
• Cloud, reflectivity, at altitude(Reflectivity)
• Rx290KLevel
• lon
• NyquistVelocity
• ModeDescription
• PeakTransmittedPowerAvg
• TimeAvg
• StartGateDelay
• InterPulsePeriod
• lat
• alt
• RxGain
• time
• NumReceivers
• RangeCorrectedPower
• MMCR Spectral Width(SpectralWidth)
• AvgNoiseLevel
• NoiseLevel
• CircularDepolarizationRatio
• RadarConstant

• lat
• SonicWD_SDU_WVT
• RH10M_STD
• VP10M_STD
• Relative humidity, average, at 10-m height(RH10M_AVG)
• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• Pressure, vapor, at 2-m height(VP2M_AVG)
• Pressure, vapor, at 20-m height(VP20M_AVG)
• Temperature, dew point, average, at 10-m height(DP10M_AVG)
• CMHTemp
• VP20M_STD
• DP20M_STD
• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)
• RefT10m_AVG
• DP40M_STD
• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• Wind speed, mean, at 40-m height(WS40M_S_WVT)
• time
• RefT40M_AVG
• DP10M_STD
• PWSAlarm
• WD40M_SDU_WVT
• alt
• RefT2M_AVG
• Wind speed, vector-averaged, at 20-m height(WS20M_U_WVT)
• SatVPCMH
• PwCod1hr
• lon
• Temperature, air, average, at 10-m height(T10M_AVG)
• Temperature, dew point, average, at 20-m height(DP20M_AVG)
• SonicS_AVG
• T40M_STD
• VPCMH
• DP2M_STD
• RH40M_STD
• RefT20M_AVG
• VP40M_STD
• PcpRate
• base_time
• Pressure, atmospheric(AtmPress)
• SonicX_AVG
• Visibility, 1 minute average(AvgVis1mi)
• WD2M_SDU_WVT
• Wind direction, vector-averaged, at 20-m height(WD20M_DU_WVT)
• Visibility, 10 minute average(AvgVis10m)
• CMHDP
• Temperature, air, average, at 20-m height(T20M_AVG)
• T10M_STD
• CumH2O
• CumSnow
• PwCod15mi
• T20M_STD
• Volt10M_AVG
• SonicY_AVG
• Relative humidity, average, at 40-m height(RH40M_AVG)
• WD10M_SDU_WVT
• WD20M_SDU_WVT
• SonicWD_DU_WVT
• Temperature, air, average, at 40-m height(T40M_AVG)
• Wind speed, mean, at 10-m height(WS10M_S_WVT)
• Pressure, vapor, at 10-m height(VP10M_AVG)
• InstPwCod
• Volt40M_AVG
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• RH2M_STD
• Batt_Volt
• Relative humidity, average, at 2-m height(RH2M_AVG)
• Wind speed, vector-averaged, at 40-m height(WS40M_U_WVT)
• T2M_STD
• Temperature, air, average, at 2-m height(T2M_AVG)
• Temperature, dew point, average, at 40-m height(DP40M_AVG)
• VP2M_STD
• time_offset
• SonicWS_U_WVT
• RH20M_STD
• Pressure, vapor, at 40-m height(VP40M_AVG)
• Relative humidity, average, at 20-m height(RH20M_AVG)
• Wind speed, mean, at 20-m height(WS20M_S_WVT)
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)
• Volt20M_AVG
• Volt2M_AVG
• SonicWS_S_WVT
• CMHRH

• azimuth
• Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
• alt
• frequency
• Temperature, air, at instrument height (1 or 2 m)(surfaceTemperature)
• elevation
• Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
• Humidity, relative, at instrument height (1 or 2 m)(surfaceRelativeHumidity)
• Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
• Pressure, lifting condensation level(liftingCondensationLevelPres)
• Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
• Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
• base_time
• totalPrecipitableWaterRmsError
• Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
• Density, water vapor, at instrument height (1 or 2 m)(surfaceWaterVaporDensity)
• liquidWaterContentRmsError
• blackbodyTemperature
• Height, level of free convection(levelFreeConvection)
• Retrieved dewpoint temperature(dewpointTemperature)
• lon
• time
• temperatureRmsError
• Retrieved water vapor mixing ratio(waterVaporMixingRatio)
• Air temperature(temperature)
• time_offset
• Microwave brightness temperature(brightnessTemperature)
• Height, lifting condensation level(liftingCondensationLevel)
• Height, cloud base, height where IR temp. matches retrieved temp. profile(cloudBaseHeight)
• Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
• Height, equilibrium level(equilibriumLevel)
• Barometric pressure(pressure)
• Pressure, barometric. at instrument height (1 or 2 m)(surfacePressure)
• Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
• Pressure, associated geometric height, at altitude, NGM model output(height)
• lat
• liquidWaterPathRmsError
• Pressure, equilibrium level(equilibriumLevelPres)
• totalPrecipitableWater2RmsError
• waterVaporDensityRmsError
• infraredTemperature
• dataQualityFlags
• Pressure, level of free convection(levelFreeConvectionPres)
• Energy, potential, convective, available, from RUC model(cape)
• liquidWaterPath2RmsError
• wetWindowFlag

• snr
• oband
• bswitch
• lon
• beam
• base_time
• vband
• spcavetime
• pcbits
• ipp
• mdf
• plen
• nheight
• alt
• dly
• time_offset
• vsr
• elevation
• nspc
• Spectral Width(specw)
• sitime
• ncoh
• tditime
• range_gate
• prf
• noise
• height_t
• lat
• sampr
• rgl
• rgs
• rgf

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

• JPEG data stream - documentation not yet available

NSA/METTWR/C1 - CMH data intermittently poor

CMH aspirator fan intermittently failed causing higher than actual 
             temperature and dew point readings.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C2 - Tower Lowered

The tower was lowered to install the GroundMFR.  Data from the T/RH probes and the wind 
speed and direction sensors are not representative during the time period.

• RH2m_STD
• Wind speed, vector-averaged(WinSpeed_U_WVT)
• DP5m_STD
• Relative humidity, average, at 2-m height(RH5m_AVG)
• WinDir_SDU_WVT
• VP5m_STD
• Temperature, air, average, at 2-m height(T2m_AVG)
• T2m_STD
• Wind speed, mean(WinSpeed_S_WVT)
• Temperature, dew point, average, at 5-m height(DP5m_AVG)
• VP2m_STD
• T5m_STD
• Pressure, vapor, at 2-m height(VP2m_AVG)
• RH5m_STD
• Relative humidity, average, at 2-m height(RH2m_AVG)
• Pressure, vapor, at 5-m height(VP5m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• Wind direction, vector-averaged(WinDir_DU_WVT)
• Temperature, air, average, at 5-m height(T5m_AVG)

NSA/METTWR/C1 - Incorrect Maximum for Precip Values

The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are 
incorrect.  In communication with the manufacturer it has been found that the manual was in 
error.  The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 
999.99 mm/hr.

• PcpRate
• CumH2O

NSA/METTWR/C2 - Incorrect Maximum for Precip Values

The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are 
incorrect.  In communication with the manufacturer it has been found that the manual was in 
error.  The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 
999.99 mm/hr.

• CumH2O
• Precipitation Rate(PCPRate)

NSA/METTWR/C2 - CMH Data Missing During Calibration

The CMH was removed for it's bi-annual cleaning and calibration.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C1 - CMH mirror dirty

The CMH mirror was in need of cleaning.  The data is suspect from 05/28/05 through 
07/04/05 as intermittently poor readings occurred.  After 07/04/05 the data was incorrect as the 
mirror was excessively dirty.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C2 - Tower Lowered, Data Not Representative

The tower was lowered to remove equipment.  The data from the wind sensors and T/RH probes 
were not representative.

• RH2m_STD
• Wind speed, vector-averaged(WinSpeed_U_WVT)
• DP5m_STD
• Relative humidity, average, at 2-m height(RH5m_AVG)
• WinDir_SDU_WVT
• VP5m_STD
• Temperature, air, average, at 2-m height(T2m_AVG)
• T2m_STD
• Wind speed, mean(WinSpeed_S_WVT)
• Temperature, dew point, average, at 5-m height(DP5m_AVG)
• VP2m_STD
• T5m_STD
• Pressure, vapor, at 2-m height(VP2m_AVG)
• RH5m_STD
• Relative humidity, average, at 2-m height(RH2m_AVG)
• Pressure, vapor, at 5-m height(VP5m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• Wind direction, vector-averaged(WinDir_DU_WVT)
• Temperature, air, average, at 5-m height(T5m_AVG)

NSA/METTWR/C1 - Tower Maintenance

The booms of the tower were lowered for sensor replacement, calibration, and tower 
maintenance.  During the maintenance and sensor replacement data are frequently missing.  Where 
data are available, they are not or may not be representative because the booms were at 
the base of the tower during the time period listed.

The chilled mirror measurements were not affected by the maintenance.

• Pressure, vapor, at 10-m height(VP10M_AVG)
• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• T2M_STD
• DP2M_STD
• Pressure, vapor, at 20-m height(VP20M_AVG)
• SonicWD_DU_WVT
• WD40M_SDU_WVT
• VP10M_STD
• Temperature, air, average, at 2-m height(T2M_AVG)
• RH40M_STD
• Temperature, dew point, average, at 40-m height(DP40M_AVG)
• Temperature, dew point, average, at 10-m height(DP10M_AVG)
• RefT20M_AVG
• Relative humidity, average, at 10-m height(RH10M_AVG)
• VP2M_STD
• VP40M_STD
• Visibility, 1 minute average(AvgVis1mi)
• Temperature, air, average, at 10-m height(T10M_AVG)
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)
• Wind speed, mean, at 40-m height(WS40M_S_WVT)
• SonicWS_U_WVT
• RefT40M_AVG
• Temperature, air, average, at 40-m height(T40M_AVG)
• RH20M_STD
• T20M_STD
• PwCod1hr
• DP10M_STD
• Volt20M_AVG
• InstPwCod
• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• PWSAlarm
• Volt10M_AVG
• PcpRate
• DP20M_STD
• WD2M_SDU_WVT
• Volt40M_AVG
• Wind speed, mean, at 10-m height(WS10M_S_WVT)
• Temperature, dew point, average, at 20-m height(DP20M_AVG)
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• Temperature, air, average, at 20-m height(T20M_AVG)
• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• RH2M_STD
• Wind direction, vector-averaged, at 20-m height(WD20M_DU_WVT)
• SonicS_AVG
• RefT2M_AVG
• SonicY_AVG
• Pressure, vapor, at 40-m height(VP40M_AVG)
• Relative humidity, average, at 20-m height(RH20M_AVG)
• Volt2M_AVG
• Pressure, vapor, at 2-m height(VP2M_AVG)
• SonicX_AVG
• SonicWD_SDU_WVT
• RH10M_STD
• T10M_STD
• Relative humidity, average, at 2-m height(RH2M_AVG)
• Relative humidity, average, at 40-m height(RH40M_AVG)
• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• Wind speed, vector-averaged, at 20-m height(WS20M_U_WVT)
• CumH2O
• WD10M_SDU_WVT
• T40M_STD
• WD20M_SDU_WVT
• CumSnow
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)
• SonicWS_S_WVT
• Wind speed, vector-averaged, at 40-m height(WS40M_U_WVT)
• RefT10m_AVG
• Visibility, 10 minute average(AvgVis10m)
• Wind speed, mean, at 20-m height(WS20M_S_WVT)
• PwCod15mi
• VP20M_STD
• DP40M_STD

NSA/METTWR/C1 - CMH and PWS data missing

The CMH and PWS data are missing and unrecoverable.  A GFCI was tripped causing a loss of 
power to these sensors.   The CMH came back online at 1916 GMT and the PWS came back 
online at 1918 GMT.

• VPCMH
• PcpRate
• SatVPCMH
• CMHDP
• CumH2O
• CMHTemp
• PwCod1hr
• InstPwCod
• CumSnow
• PWSAlarm
• Visibility, 10 minute average(AvgVis10m)
• Visibility, 1 minute average(AvgVis1mi)
• PwCod15mi
• CMHRH

NSA/METTWR/C1 - CMH Data Missing

Data from CMH was missing due to a corroded RS-232 9-Pin connector.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 2m wind Direction Sensor Failed

The 2m cup wind direction flat lined at 236 degrees.  Sensor failed.

• WD2M_SDU_WVT
• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/METTWR/C1 - Data 1-minute behind

Data from the Barometer, Chilled Mirror Hygrometer and the Present Weather Sensor were 
one-minute behind due to timing problems collecting data from the Serial Data Multiplexer 
that handled these sensors.

• VPCMH
• PcpRate
• SatVPCMH
• CMHDP
• CumH2O
• CMHTemp
• PwCod1hr
• InstPwCod
• CumSnow
• PWSAlarm
• Visibility, 10 minute average(AvgVis10m)
• Pressure, atmospheric(AtmPress)
• Visibility, 1 minute average(AvgVis1mi)
• PwCod15mi
• CMHRH

NSA/METTWR/C1 - Reprocess: Wind direction data incorrect

Wind direction data is off by 30 degrees for all wind sensors.  The 40-m tower was 
misaligned to true north.

• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• Wind direction, vector-averaged, at 20-m height(WD20M_DU_WVT)
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• SonicWD_DU_WVT
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/METTWR/C1 - CMH Data Not Representative

The intake of the CMH was blocked with hoar frost.  The temperatures measured by the 
chilled mirror and the temperature probe were not representative of the ambient conditions as 
a result.  The RH data calculated from these values is incorrect also.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - CMH Data missing

CMH dew point and temp data was missing. Since Dew Point and Temp data missing RH% value = 
100% during outage.  Corrosion on power plug was athe problem.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - Ultrasonic Wind Sensor Values Incorrect

The values collected from the ultrasonic wind sensor were intermittently incorrect.  Heavy 
wet snow during blizzard condition was interfering with the ultrasonic readings.

• SonicWD_SDU_WVT
• SonicWS_U_WVT
• SonicWS_S_WVT
• SonicS_AVG
• SonicY_AVG
• SonicWD_DU_WVT
• SonicX_AVG

NSA/METTWR/C1 - PWS data missing due to blizzard

PWS was offline and data was missing.  A blizzard consisting of heavy wet snow and strong 
winds caused snow impaction in the optics.  The PWS reported missing data as it was 
unable to measure anything meaningful.

• PcpRate
• InstPwCod
• CumSnow
• Visibility, 10 minute average(AvgVis10m)
• PWSAlarm
• Visibility, 1 minute average(AvgVis1mi)
• PwCod15mi
• PwCod1hr

NSA/METTWR/C2 - Wind speed values artificially low

Wind speed values were artificially low due to snow/ice accumulation on the anemometer 
cups during blizzard conditions.  The heaters on the cups were not able to keep up with 
conditions.

• Wind speed, vector-averaged(WinSpeed_U_WVT)
• Wind speed, mean(WinSpeed_S_WVT)

NSA/METTWR/C2 - CMH Data incorrect

CMH data was incorrect due to blockage of intake by heavy, wet snow during blizzard 
conditions.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C2 - PWS data incorrect

The Present Weather Sensor measurement optics were blocked by heavy, wet snow during 
blizzard conditions.

• PWCod1hr
• CumSnow
• PWSAlarm
• CumH2O
• PWcod15mi
• InstPWCod
• Visibility, 1 minute average(AvgVis1mi)
• Precipitation Rate(PCPRate)
• Visibility, 10 minute average(AvgVis10m)

NSA/METTWR/C1 - 2m Wind Speed Artificially Low

The 2m wind speed values were artificially low due to snow impaction during a heavy 
blizzard.  The cup anemometer heaters could not keep up with the rapid deposition of snow.

• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)

NSA/METTWR/C1 - CMH temp inaccurate

The CMH Temperature was consistently 4-7 degrees warmer than the 2M, 40M, 20M, and 10M 
temp. Intake fan failure; fan was replaced.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 10m Wind Speed Low

The 10m wind speed values are too low due to ice accumulation on the cup anemometer.

• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• Wind speed, mean, at 10-m height(WS10M_S_WVT)

NSA/METTWR/C1 - 10m Wind Speed Intermittently Low

The 10m wind speeds are intermittently too low due to ice accumulation on the cup 
anemometer.

• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• Wind speed, mean, at 10-m height(WS10M_S_WVT)

NSA/METTWR/C1 - 40m Wind Speeds Intermittently Low

The 40m wind speed values were too low due to ice accumulation on the cup anemometer.

• Wind speed, mean, at 40-m height(WS40M_S_WVT)
• Wind speed, vector-averaged, at 40-m height(WS40M_U_WVT)

NSA/METTWR/C1 - 20m Wind Speeds Intermittently Low

The 20m wind speeds were artificially low due to ice accumulation on the cup anemometer.

• Wind speed, vector-averaged, at 20-m height(WS20M_U_WVT)
• Wind speed, mean, at 20-m height(WS20M_S_WVT)

NSA/METTWR/C2 - CMH Intake Fan Failure

Intake fan failing causing poor readings from the CMH.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C2 - CMH Data Suspect

CMH data was suspect due to incorrect intake fan installed.  Proper spares were not on 
hand.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C2 - CMH Data Suspect

CMH data was suspect due to blockage of intake by snow.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C1 - CMH Data Missing

CMH data was missing due to it being removed for maintenance.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - CMH Data Suspect

CMH data was suspect due to incorrect calibration caused by procedural errors.  The 
procedures were corrected and a new calibration completed.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - Wind direction measurements suspect

20m wind direction standard deviation was 0 degrees for extended periods of time.  This 
suggests the wind vane was icing up.

• Wind direction, vector-averaged, at 20-m height(WD20M_DU_WVT)
• WD20M_SDU_WVT

NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Pressure, atmospheric(AtmPress)

NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Pressure, atmospheric(AtmPress)

NSA/METTWR/C2 - CMH data missing and/or incorrect during maintenance.

CMH measured data was missing and the derived variables were incorrect due to routine 
maintenance.

• VPCMH
• CMHDP
• SatVPCMH
• CMHRH
• CMHTemp

NSA/METTWR/C2 - PWS data missing/incorrect due to maintenance.

Present Weather Sensor data was missing or incorrect due to maintenance activities 
repeated approximately daily as we were trying to correct another problem.

• PWCod1hr
• CumSnow
• PWSAlarm
• CumH2O
• PWcod15mi
• InstPWCod
• Visibility, 1 minute average(AvgVis1mi)
• Precipitation Rate(PCPRate)
• Visibility, 10 minute average(AvgVis10m)
• CMHTemp

NSA/METTWR/C2 - Met data incorrect due to tower being lowered for maintenance.

Data from the tower is not representative of local conditions due to the tower being 
lowered for radiometer change.  Sensors not attached to the tower such as the Present Weather 
Sensor, the Chilled Mirror Hygrometer and the Barometer were not affected.

• RH2m_STD
• Wind speed, vector-averaged(WinSpeed_U_WVT)
• DP5m_STD
• Relative humidity, average, at 2-m height(RH5m_AVG)
• WinDir_SDU_WVT
• VP5m_STD
• Temperature, air, average, at 2-m height(T2m_AVG)
• T2m_STD
• Wind speed, mean(WinSpeed_S_WVT)
• Temperature, dew point, average, at 5-m height(DP5m_AVG)
• VP2m_STD
• T5m_STD
• Pressure, vapor, at 2-m height(VP2m_AVG)
• RH5m_STD
• Relative humidity, average, at 2-m height(RH2m_AVG)
• Pressure, vapor, at 5-m height(VP5m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• Wind direction, vector-averaged(WinDir_DU_WVT)
• Temperature, air, average, at 5-m height(T5m_AVG)

NSA/METTWR/C1 - Present Weather Sensor data missing or incorrect due to calibration.

The Present Weather Sensor data was missing or incorrect due to calibration checks.

• PcpRate
• InstPwCod
• CumSnow
• Visibility, 10 minute average(AvgVis10m)
• PWSAlarm
• Visibility, 1 minute average(AvgVis1mi)
• PwCod15mi
• CumH2O
• PwCod1hr

NSA/METTWR/C1 - All data from 10m Level Missing

The winch that lowers the tower booms failed.  Manual testing of the motor and winch 
allowed the booms to be lowered briefly and then raised back into position.  A heavy freezing 
rain/icing event added extra weight to the booms.  This extra weight was suspected as the 
cause as to why the 10m boom became disconnected.  After a new motor was installed and 
all booms were lowered and re-raised the 10m level came back on line.

• Pressure, vapor, at 10-m height(VP10M_AVG)
• RH10M_STD
• T10M_STD
• Wind speed, mean, at 10-m height(WS10M_S_WVT)
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• VP10M_STD
• DP10M_STD
• WD10M_SDU_WVT
• Temperature, dew point, average, at 10-m height(DP10M_AVG)
• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• RefT10m_AVG
• Relative humidity, average, at 10-m height(RH10M_AVG)
• Temperature, air, average, at 10-m height(T10M_AVG)
• Volt10M_AVG

NSA/METTWR/C1 - Missing CMH data

CMH data are missing.  Corrosion in the serial data line connections caused a loss of 
communication with the CMH.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 10m level loss of power

The 10 meter instrument level lost power so all variables from this level are missing.

• Pressure, vapor, at 10-m height(VP10M_AVG)
• RH10M_STD
• T10M_STD
• Wind speed, mean, at 10-m height(WS10M_S_WVT)
• Wind direction, vector-averaged, at 10-m height(WD10M_DU_WVT)
• VP10M_STD
• DP10M_STD
• WD10M_SDU_WVT
• Temperature, dew point, average, at 10-m height(DP10M_AVG)
• Wind speed, vector-averaged, at 10-m height(WS10M_U_WVT)
• RefT10m_AVG
• Relative humidity, average, at 10-m height(RH10M_AVG)
• Temperature, air, average, at 10-m height(T10M_AVG)
• Volt10M_AVG

NSA/METTWR/C1 - 2m T/RH probe aspirator fan failed

The aspirator fan for the 2m level T/RH probe failed.  This caused higher than normal 
readings for temp and RH and artificially smoothed the data.

• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• Temperature, air, average, at 2-m height(T2M_AVG)
• RH2M_STD
• Relative humidity, average, at 2-m height(RH2M_AVG)
• DP2M_STD
• T2M_STD
• VP2M_STD
• Pressure, vapor, at 2-m height(VP2M_AVG)

NSA/METTWR/C2 - 2m Temp/RH sensor blocked with snow

The 2m RH, Dew Point and Vapor Pressure values are incorrect due to the intake of the 
aspirated shield being blocked with snow and ice.  The RH% values are artificially larger 
than the 5m and Chilled Mirror values.

• RH2m_STD
• Pressure, vapor, at 2-m height(VP2m_AVG)
• Relative humidity, average, at 2-m height(RH2m_AVG)
• DP2m_STD
• Temperature, dew point, average, at 2-m height(DP2m_AVG)
• VP2m_STD

NSA/METTWR/C1 - Wind direction sensor frozen

After a power outage the 40m wind direction sensor was frozen.  Data from this sensor was 
not representative of the true winds.

• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• WD40M_SDU_WVT

NSA/METTWR/C1 - CMH Sensor Calibrated Incorrectly

The CMH temp and DP were higher than the co-located T/RH probe at the 2m level.  An 
incorrect calibration along with a failing thermistor caused the readings to be incorrect for 
both measured values Temp and Dew Point.

• VPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 40m wind sensor heater failure

The 40m wind direction became frozen at times.  The values from the sensor were flat-lined 
(stdev = 0) much of the time and did not match sensors from other levels.

• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• WD40M_SDU_WVT

NSA/METTWR/C1 - 40m Wind Direction Data Suspect

The 40m wind direction data was suspect due to icing on the vane or a failing shafter 
heater or a combination of both.  The affected data can be easily seen on comparison plots 
with other levels data or by checking the standard deviation of the 40m wind direction.  
Any standard deviation of less than 0.10 degrees for the 40m level suggest a sluggish/ice 
affected sensor.

• Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT)
• WD40M_SDU_WVT

NSA/METTWR/C1 - PWS Data Questionable

There was a degradation in the PWS lenses.  New lenses were installed on 08/28/2007 but a 
proper calibration was not conducted until 10/10/2007.  Data  during the listed time 
period should be used with caution.

• PcpRate
• InstPwCod
• CumSnow
• Visibility, 10 minute average(AvgVis10m)
• PWSAlarm
• Visibility, 1 minute average(AvgVis1mi)
• PwCod15mi
• CumH2O
• PwCod1hr

NSA/METTWR/C1 - 20m RH Data Questionable

The 20m RH data was questionable at times.  When the data appeared to be poor was when the 
2m and 20m agreed better than the 20m and the 40m and/or 10m.

• DP20M_STD
• Temperature, dew point, average, at 20-m height(DP20M_AVG)
• Pressure, vapor, at 20-m height(VP20M_AVG)
• RH20M_STD
• Relative humidity, average, at 20-m height(RH20M_AVG)
• VP20M_STD

NSA/METTWR/C1 - Intermittent missing data

Intermittent failure of the CMH to communicate with the logging system occurred on a daily 
basis.  This problem occurred anywhere from 4 to 8 hrs.  Problem began after maintenance 
to replace failing aspirator fan on 03/13/2008.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 2m Wind Direction Sensor Freezing

The 2m wind direction was failing.  It began to exhibit instances of no movement 
suggesting it was frozen.  After some time it began to make erratic measurements compared to the 
co-located Ultrasonic and compared to the directions at the other levels.

• WD2M_SDU_WVT
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/METTWR/C1 - CMH Intake Fan Failure

The CMH intake fan failed causing the dew point and temp data to be incorrect.

If users need only T/RH and derived variables they can use the 2m data collected using the 
HMP-45D probes.  CMH data are unrecoverable.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 2m Datalogger Failed

The 2m temperature, wind speed, wind direction, and relative humidity were reporting the 
missing value (-9999).

• WD2M_SDU_WVT
• Relative humidity, average, at 2-m height(RH2M_AVG)
• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• T2M_STD
• DP2M_STD
• Temperature, air, average, at 2-m height(T2M_AVG)
• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• RH2M_STD
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)
• RefT2M_AVG
• VP2M_STD
• Volt2M_AVG
• Pressure, vapor, at 2-m height(VP2M_AVG)
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/METTWR/C1 - CMH required Calibration

The Chilled Mirror was showing some signs of being out of calibration.  Temperatures were 
at times higher than co-located temp probes and the dew point temperature values at times 
were not consistent with co-located RH sensors.

• VPCMH
• SatVPCMH
• CMHDP
• CMHTemp
• CMHRH

NSA/METTWR/C1 - 2m level data incorrect

The 2m data for temp, RH, dew point, wind speed wind direction & vapor pressure were 
incorrect.  The voltage values for the datalogger at that level were reporting as 60V with 
excursions to 100V.  These values should have damaged the logger at that level.  After an 
extended power outage on 08/04 the data all became reasonable. There is no explanation as 
to the cause of this failure.

• WD2M_SDU_WVT
• Relative humidity, average, at 2-m height(RH2M_AVG)
• Wind speed, mean, at 2-m height(WS2M_S_WVT)
• T2M_STD
• DP2M_STD
• Temperature, air, average, at 2-m height(T2M_AVG)
• Temperature, dew point, average, at 2-m height(DP2M_AVG)
• RH2M_STD
• Wind speed, vector-averaged, at 2-m height(WS2M_U_WVT)
• RefT2M_AVG
• VP2M_STD
• Volt2M_AVG
• Pressure, vapor, at 2-m height(VP2M_AVG)
• Wind direction, vector-averaged, at 2-m height(WD2M_DU_WVT)

NSA/MET/C1 - Temp/RH/wind data questionable

New wind sensors and new T/RH probes were being installed during this time period.  The 
tower booms were lowered and much of the data collected were not at listed heights nor were 
the data accurate due to configurations during install.

• qc_wspd_arith_mean
• qc_rh_mean
• qc_wspd_vec_mean
• vapor_pressure_std
• Wind speed vector mean(wspd_vec_mean)
• qc_temp_mean
• temp_std
• Relative humidity mean(rh_mean)
• dew_point_mean
• Wind speed arithmetic mean(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_mean
• Temperature mean(temp_mean)
• vapor_pressure_mean
• wdir_vec_std
• qc_vapor_pressure_mean
• qc_dew_point_mean
• trh_err_code
• dew_point_std
• rh_std

• wdir_vec_std
• qc_wspd_arith_mean
• qc_temp_mean
• trh_err_code
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wdir_vec_mean
• dew_point_mean
• Temperature mean(temp_mean)
• temp_std
• Wind speed vector mean(wspd_vec_mean)
• Relative humidity mean(rh_mean)
• dew_point_std
• rh_std
• qc_rh_mean
• Wind direction vector mean(wdir_vec_mean)
• vapor_pressure_mean
• vapor_pressure_std
• qc_wspd_vec_mean
• qc_dew_point_mean
• qc_vapor_pressure_mean

NSA/MET/C1 - PWS data missing due to snow impaction

Blizzard conditions caused the optics to become impacted with snow and ice rendering the 
Present Weather Detector inoperative.

• qc_pws_cumul_snow
• qc_pws_pw_code_15min
• qc_pws_precip_rate_mean_1min
• qc_pws_cumul_rain
• PWS 10 minute mean visibility(pws_vis_mean_10min)
• pws_err_code
• qc_pws_vis_mean_1min
• pws_cumul_rain
• pws_pw_code_1hr
• Rain, surface, 1-min avg(pws_precip_rate_mean_1min)
• pws_cumul_snow
• pws_pw_code_15min
• qc_pws_pw_code_inst
• pws_pw_code_inst
• qc_pws_pw_code_1hr
• qc_pws_err_code
• qc_pws_vis_mean_10min
• PWS 1 minute mean visibility(pws_vis_mean_1min)

NSA/MET/C1 - Wind data intermittent

There was a loose wire on the serial data multiplexer causing the wind data to become 
missing during high wind situations.  The high winds caused the enclosure to vibrate making 
the connection intermittent.

• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wspd_arith_mean
• qc_wspd_vec_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

• wdir_vec_std
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_wspd_vec_mean
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)

NSA/MET/C1 - CMH data missing

The data from the CMH was missing during these times due to a failing logic board.  The 
board was replaced.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - Met data incorrect during calibration

All met data from the tower booms (temp, RH, winds and derived variables) were incorrect 
due to the booms being lowered from their measurement heights.  Additionally, the 
scaffolding was located directly adjacent to the booms affecting the wind field and the Temp/RH 
data.

• qc_wspd_arith_mean
• qc_rh_mean
• qc_wspd_vec_mean
• vapor_pressure_std
• Wind speed vector mean(wspd_vec_mean)
• qc_temp_mean
• temp_std
• qc_time
• Relative humidity mean(rh_mean)
• dew_point_mean
• Wind speed arithmetic mean(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_mean
• Temperature mean(temp_mean)
• vapor_pressure_mean
• wdir_vec_std
• qc_vapor_pressure_mean
• qc_dew_point_mean
• trh_err_code
• dew_point_std
• rh_std

• wdir_vec_std
• qc_wspd_arith_mean
• qc_temp_mean
• trh_err_code
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wdir_vec_mean
• dew_point_mean
• Temperature mean(temp_mean)
• temp_std
• Wind speed vector mean(wspd_vec_mean)
• Relative humidity mean(rh_mean)
• dew_point_std
• rh_std
• qc_rh_mean
• Wind direction vector mean(wdir_vec_mean)
• vapor_pressure_mean
• vapor_pressure_std
• qc_wspd_vec_mean
• qc_dew_point_mean
• qc_vapor_pressure_mean

NSA/MET/C1 - PWS calibration

The PWS was undergoing calibration. Any data collected during this time is not 
representative of the atmospheric state.

• qc_pws_cumul_snow
• qc_pws_pw_code_15min
• qc_pws_precip_rate_mean_1min
• qc_pws_cumul_rain
• PWS 10 minute mean visibility(pws_vis_mean_10min)
• pws_err_code
• qc_pws_vis_mean_1min
• pws_cumul_rain
• pws_pw_code_1hr
• Rain, surface, 1-min avg(pws_precip_rate_mean_1min)
• pws_cumul_snow
• pws_pw_code_15min
• qc_pws_pw_code_inst
• pws_pw_code_inst
• qc_pws_pw_code_1hr
• qc_pws_err_code
• qc_pws_vis_mean_10min
• PWS 1 minute mean visibility(pws_vis_mean_1min)

NSA/MET/C1 - CMH calibration

CMH data missing due to removal of the sensor for annual calibration.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - 2m RH values incorrect

The new t/rh probe installed during annual calibrations and checks began to exhibit 
readings that were biased high compared to the Chilled Mirror Hygrometer.  In high RH 
conditions the sensor would consistently report RH values in excess of 105%.  Comparisons to the 
other tower levels also suggested that the 2m level RH data is suspect.

• Relative humidity mean(rh_mean)
• dew_point_mean
• qc_rh_mean
• vapor_pressure_std
• vapor_pressure_mean
• qc_dew_point_mean
• dew_point_std
• rh_std

• rh_std
• qc_rh_mean
• vapor_pressure_mean
• vapor_pressure_std
• dew_point_mean
• qc_dew_point_mean
• Relative humidity mean(rh_mean)
• dew_point_std
• qc_vapor_pressure_mean

NSA/TWR/C1 - 40m T/RH Sensor Failure

40m RH data were very noisy after tower maintenance.  Following system re-boot, RH data 
were too high. Sensor was replaced.

• dew_point_mean
• qc_dew_point_mean
• rh_std
• qc_rh_mean
• vapor_pressure_mean
• vapor_pressure_std
• dew_point_std
• Relative humidity mean(rh_mean)
• qc_vapor_pressure_mean

NSA/TWR/C1 - 40m and 20m Data Incorrect

A power distribution problem required us to shut down power to the 40m level.  All T/RH 
were missing and the 40m wind sensor did not have heat to remove any ice build up.  All 
wind data from the 40m level should be viewed critically before use.  The 20m T/RH sensor 
was power spike when the problem occurred causing this sensor to become erratic.  
See D100302.2 for the continuation of the 40m problem.

• wdir_vec_std
• rh_std
• qc_rh_mean
• qc_wspd_arith_mean
• qc_temp_mean
• Wind direction vector mean(wdir_vec_mean)
• vapor_pressure_mean
• vapor_pressure_std
• qc_wspd_vec_mean
• trh_err_code
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wdir_vec_mean
• dew_point_mean
• qc_dew_point_mean
• Temperature mean(temp_mean)
• temp_std
• Wind speed vector mean(wspd_vec_mean)
• Relative humidity mean(rh_mean)
• dew_point_std
• qc_vapor_pressure_mean

NSA/MET/C1 - CMH and 10m winds failure

At 0513GMT on 1/23 the atmos_pressure and CMH - temp, RH, DP & Sat. VP changed abruptly to 
unlikely values. The 10m winds failed at 1420GMT.

The CMH was repaired on 02/04/2010 at 2254GMT and the 10m winds sensor was replaced on 
02/05/2010 at 2100GMT.

• cmh_dew_point
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wspd_arith_mean
• qc_cmh_dew_point
• qc_wspd_vec_mean
• Wind direction vector mean(wdir_vec_mean)
• cmh_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• qc_cmh_rh
• cmh_temp
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• cmh_rh

NSA/TWR/C1 - Wind sensor data failures

The wind speed and direction values for 2m, 10m and 20m dropped to zero at 14:20 GMT. The 
cause was a power failure due to failed power line.  Power spikes caused the wind sensors 
to revert to default settings for communications and measurements. The following is a 
list of dates that the various sensors came back online:
  2m wind problem ending on 01/28/2010 @ 2330GMT
 20m wind problem ending on 02/04/2010 @ 2230GMT
 10m wind problem ending on 02/05/2010 @ 2100GMT
  
40m winds were already failing and documented in DQPR 2262 and PIF P091030.1.  

The MET system was also affected and documented in DQPR 2337.

• wdir_vec_std
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wdir_vec_mean
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• qc_wspd_vec_mean

NSA/MET/C1 - CMH Data Missing

The GFCI had tripped causing the CMH to lose power.  All CMH variables are missing except 
CMHRH which reports 100% for the entire time.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - CMH Sent to Vendor for Repair

CMH connector on the transmitter enclosure that goes to the head unit degraded and failed. 
 System was removed and sent to the manufacturer for repair.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - CMH offline

CMH removed for repair.

• cmh_dew_point
• qc_cmh_dew_point
• qc_cmh_rh
• cmh_temp
• cmh_vapor_pressure
• qc_cmh_vapor_pressure
• qc_cmh_sat_vapor_pressure
• qc_cmh_temp
• cmh_sat_vapor_pressure
• cmh_rh

NSA/MET/C1 - 10m wind sensor offline

The 10m wind sensor values were 0 m/s and 000 for wind direction. The sensor lost 
communications.

• qc_wdir_vec_mean
• Wind speed arithmetic mean(wspd_arith_mean)
• qc_wspd_arith_mean
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• qc_wspd_vec_mean
• Wind direction vector mean(wdir_vec_mean)

NSA/TOWER - Mislabeled tower sensors