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.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Wind Direction(wind_dir_max)
• Relative humidity minimum(relh_min)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Maximum Wind Speed(wind_spd_max)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Temperature maximum(temp_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Dummy altitude for Zeb(alt)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Minimum Wind Direction(wind_dir_min)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Relative humidity maximum(relh_max)
• GPS raw data filename(filename)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Mean Wind Speed(wind_spd_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• NWS code(present_weather_sensor_NWS_code)
• lon(lon)
• Ten Minute PW code \\(WMO SYNOP code\\)(ten_minute_PW_code)
• One Minute PW code \\(WMO SYNOP code\\)(one_minute_PW_code)
• Time offset of tweaks from base_time(time_offset)
• Ten Minute PW code out of range error(ten_min_pw_code_out_of_range_error)
• One Hour PW code \\(WMO SYNOP code\\)(one_hour_PW_code)
• one Minute Visibility(one_minute_visibility)
• Precipitation rate(precip_rate)
• Ten Minute Visibility(ten_minute_visibility)
• Cumulative Snow out of range error(cumul_snow_out_of_range_error)
• PWS Precipitation Rate out of range error(precip_rate_out_of_range_error)
• One Minute PW code out of range error(one_min_pw_code_out_of_range_error)
• One Minute Visibility out of range error(one_minute_vis_out_of_range_error)
• base time(base_time)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Present Weather Sensor Serial Error(pws_serial_error)
• Dummy altitude for Zeb(alt)
• Liquid Water Equivalent out of range error(cumul_liq_water_equiv_out_of_range_err)
• Present Weather Sensor Read Timeout Error(pws_read_timeout_error)
• GPS raw data filename(filename)
• Ten Minute Visibility out of range error(ten_minute_vis_out_of_range_error)
• Cumulative Snow(cumulative_snow)
• One Hour PW code out of range error(one_hour_pw_code_out_of_range_error)
• lat(lat)

• ORG Serial Error(precip_serial_error)
• Time offset of tweaks from base_time(time_offset)
• Daily Accumulation(precip_daily_accum)
• base time(base_time)
• ORG No Data Error(precip_no_data_error)
• NWS code(precip_NWS_code)
• GPS raw data filename(filename)
• Dummy altitude for Zeb(alt)
• ORG Read Timeout Error(precip_read_timeout_error)
• Daily Accumulation out of range error(precip_out_of_range_error)
• Precipitation rate(precip_rate)
• lat(lat)
• lon(lon)

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.

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

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

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.

• Number of timeouts reading the met tower data by height(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.

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

• Mean Wind Speed(wind_spd_mean)
• Maximum Wind Speed(wind_spd_max)
• Std Dev of Wind Speed(wind_spd_sd)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• Wind Speed out of range error(wind_spd_out_of_range_error)

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 Speed out of range error(win_spd_out_of_range_error)
• Std Dev of Wind Direction(wind_dir_sd)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Direction(wind_dir_max)

• Wind Direction out of range error(wind_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Maximum Wind Direction(wind_dir_max)
• Std Dev of Wind Direction(wind_dir_sd)
• 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.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Maximum Wind Speed(wind_spd_max)
• Std Dev of Wind Speed(wind_spd_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Temperature maximum(temp_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Serial Port Error(serial_port_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Minimum Wind Speed(wind_spd_min)
• Minimum Wind Direction(wind_dir_min)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Relative humidity maximum(relh_max)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Maximum Wind Direction(wind_dir_max)
• Relative humidity minimum(relh_min)
• Std Dev of Air Temperature(temp_sd)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Air Temperature Hardware Error(temp_hardware_error)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Mean Wind Speed(wind_spd_mean)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• One Minute PW code out of range error(one_min_pw_code_out_of_range_error)
• Ten Minute PW code out of range error(ten_min_pw_code_out_of_range_error)
• One Minute PW code \\(WMO SYNOP code\\)(one_minute_PW_code)
• NWS code(present_weather_sensor_NWS_code)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Liquid Water Equivalent out of range error(cumul_liq_water_equiv_out_of_range_err)
• Cumulative Snow(cumulative_snow)
• PWS Precipitation Rate out of range error(precip_rate_out_of_range_error)
• Present Weather Sensor Read Timeout Error(pws_read_timeout_error)
• Ten Minute Visibility out of range error(ten_minute_vis_out_of_range_error)
• One Hour PW code out of range error(one_hour_pw_code_out_of_range_error)
• One Minute Visibility out of range error(one_minute_vis_out_of_range_error)
• Present Weather Sensor Serial Error(pws_serial_error)
• Precipitation rate(precip_rate)
• one Minute Visibility(one_minute_visibility)
• Ten Minute PW code \\(WMO SYNOP code\\)(ten_minute_PW_code)
• One Hour PW code \\(WMO SYNOP code\\)(one_hour_PW_code)
• Ten Minute Visibility(ten_minute_visibility)
• Cumulative Snow out of range error(cumul_snow_out_of_range_error)

• NWS code(precip_NWS_code)
• Daily Accumulation(precip_daily_accum)
• Precipitation rate(precip_rate)
• Daily Accumulation out of range error(precip_out_of_range_error)
• ORG Read Timeout Error(precip_read_timeout_error)
• ORG Serial Error(precip_serial_error)
• ORG No Data Error(precip_no_data_error)

• Internal Voltage out of range error(internal_voltage_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Air Temperature(temp_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Mean Vapor Pressure(vap_pres_mean)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Wind Speed out of range error(wind_spd_out_of_range_error)
• Temperature maximum(temp_max)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Std Dev of Wind Speed(wind_spd_sd)
• Mean Wind Speed(wind_spd_mean)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Barometric Pressure(atmos_pressure)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Air Temperature Hardware Error(temp_hardware_error)
• Minimum Wind Direction(wind_dir_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Air Temperature out of range error(temp_out_of_range_error)
• Wind Direction out of range error(wind_dir_out_of_range_error)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Maximum Wind Direction(wind_dir_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Maximum Wind Speed(wind_spd_max)
• Minimum Vapor Pressure(vap_pres_min)
• Temperature minimum(temp_min)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Relative humidity minimum(relh_min)

• ORG Serial Error(precip_serial_error)
• Daily Accumulation(precip_daily_accum)
• NWS code(precip_NWS_code)
• ORG No Data Error(precip_no_data_error)
• Daily Accumulation out of range error(precip_out_of_range_error)
• Precipitation rate(precip_rate)
• ORG Read Timeout Error(precip_read_timeout_error)

• Ten Minute Visibility out of range error(ten_minute_vis_out_of_range_error)
• Present Weather Sensor Read Timeout Error(pws_read_timeout_error)
• One Minute PW code \\(WMO SYNOP code\\)(one_minute_PW_code)
• Cumulative Snow(cumulative_snow)
• Precipitation rate(precip_rate)
• Present Weather Sensor Serial Error(pws_serial_error)
• Cumulative Snow out of range error(cumul_snow_out_of_range_error)
• NWS code(present_weather_sensor_NWS_code)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• One Minute PW code out of range error(one_min_pw_code_out_of_range_error)
• Ten Minute Visibility(ten_minute_visibility)
• One Hour PW code \\(WMO SYNOP code\\)(one_hour_PW_code)
• One Minute Visibility out of range error(one_minute_vis_out_of_range_error)
• Ten Minute PW code out of range error(ten_min_pw_code_out_of_range_error)
• Liquid Water Equivalent out of range error(cumul_liq_water_equiv_out_of_range_err)
• Ten Minute PW code \\(WMO SYNOP code\\)(ten_minute_PW_code)
• PWS Precipitation Rate out of range error(precip_rate_out_of_range_error)
• one Minute Visibility(one_minute_visibility)
• One Hour PW code out of range error(one_hour_pw_code_out_of_range_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.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Maximum Wind Speed(wind_spd_max)
• Std Dev of Wind Speed(wind_spd_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Temperature maximum(temp_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Serial Port Error(serial_port_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Minimum Wind Speed(wind_spd_min)
• Minimum Wind Direction(wind_dir_min)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Relative humidity maximum(relh_max)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Maximum Wind Direction(wind_dir_max)
• Relative humidity minimum(relh_min)
• Std Dev of Air Temperature(temp_sd)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Air Temperature Hardware Error(temp_hardware_error)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Mean Wind Speed(wind_spd_mean)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• One Minute PW code out of range error(one_min_pw_code_out_of_range_error)
• Ten Minute PW code out of range error(ten_min_pw_code_out_of_range_error)
• One Minute PW code \\(WMO SYNOP code\\)(one_minute_PW_code)
• NWS code(present_weather_sensor_NWS_code)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• Liquid Water Equivalent out of range error(cumul_liq_water_equiv_out_of_range_err)
• Cumulative Snow(cumulative_snow)
• PWS Precipitation Rate out of range error(precip_rate_out_of_range_error)
• Present Weather Sensor Read Timeout Error(pws_read_timeout_error)
• Ten Minute Visibility out of range error(ten_minute_vis_out_of_range_error)
• One Hour PW code out of range error(one_hour_pw_code_out_of_range_error)
• One Minute Visibility out of range error(one_minute_vis_out_of_range_error)
• Present Weather Sensor Serial Error(pws_serial_error)
• Precipitation rate(precip_rate)
• one Minute Visibility(one_minute_visibility)
• Ten Minute PW code \\(WMO SYNOP code\\)(ten_minute_PW_code)
• One Hour PW code \\(WMO SYNOP code\\)(one_hour_PW_code)
• Ten Minute Visibility(ten_minute_visibility)
• Cumulative Snow out of range error(cumul_snow_out_of_range_error)

• NWS code(precip_NWS_code)
• Daily Accumulation(precip_daily_accum)
• Precipitation rate(precip_rate)
• Daily Accumulation out of range error(precip_out_of_range_error)
• ORG Read Timeout Error(precip_read_timeout_error)
• ORG Serial Error(precip_serial_error)
• ORG No Data Error(precip_no_data_error)

• Internal Voltage out of range error(internal_voltage_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Air Temperature(temp_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Mean Vapor Pressure(vap_pres_mean)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Wind Speed out of range error(wind_spd_out_of_range_error)
• Temperature maximum(temp_max)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Std Dev of Wind Speed(wind_spd_sd)
• Mean Wind Speed(wind_spd_mean)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Barometric Pressure(atmos_pressure)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Air Temperature Hardware Error(temp_hardware_error)
• Minimum Wind Direction(wind_dir_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Air Temperature out of range error(temp_out_of_range_error)
• Wind Direction out of range error(wind_dir_out_of_range_error)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Maximum Wind Direction(wind_dir_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Maximum Wind Speed(wind_spd_max)
• Minimum Vapor Pressure(vap_pres_min)
• Temperature minimum(temp_min)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Relative humidity minimum(relh_min)

• ORG Serial Error(precip_serial_error)
• Daily Accumulation(precip_daily_accum)
• NWS code(precip_NWS_code)
• ORG No Data Error(precip_no_data_error)
• Daily Accumulation out of range error(precip_out_of_range_error)
• Precipitation rate(precip_rate)
• ORG Read Timeout Error(precip_read_timeout_error)

• Ten Minute Visibility out of range error(ten_minute_vis_out_of_range_error)
• Present Weather Sensor Read Timeout Error(pws_read_timeout_error)
• One Minute PW code \\(WMO SYNOP code\\)(one_minute_PW_code)
• Cumulative Snow(cumulative_snow)
• Precipitation rate(precip_rate)
• Present Weather Sensor Serial Error(pws_serial_error)
• Cumulative Snow out of range error(cumul_snow_out_of_range_error)
• NWS code(present_weather_sensor_NWS_code)
• Cumulative Liquid Water Equivalent(cumul_liq_water_equiv)
• One Minute PW code out of range error(one_min_pw_code_out_of_range_error)
• Ten Minute Visibility(ten_minute_visibility)
• One Hour PW code \\(WMO SYNOP code\\)(one_hour_PW_code)
• One Minute Visibility out of range error(one_minute_vis_out_of_range_error)
• Ten Minute PW code out of range error(ten_min_pw_code_out_of_range_error)
• Liquid Water Equivalent out of range error(cumul_liq_water_equiv_out_of_range_err)
• Ten Minute PW code \\(WMO SYNOP code\\)(ten_minute_PW_code)
• PWS Precipitation Rate out of range error(precip_rate_out_of_range_error)
• one Minute Visibility(one_minute_visibility)
• One Hour PW code out of range error(one_hour_pw_code_out_of_range_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.

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

• Mean Wind Speed(wind_spd_mean)
• Maximum Wind Speed(wind_spd_max)
• Std Dev of Wind Speed(wind_spd_sd)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Minimum Wind Speed(wind_spd_min)
• Wind Speed out of range error(wind_spd_out_of_range_error)

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.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Maximum Wind Direction(wind_dir_max)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Relative humidity minimum(relh_min)
• Maximum Wind Speed(wind_spd_max)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Temperature maximum(temp_max)
• Std Dev of Wind Direction(wind_dir_sd)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dummy altitude for Zeb(alt)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• Serial Port Error(serial_port_error)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Minimum Wind Direction(wind_dir_min)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Relative humidity maximum(relh_max)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Mean Wind Speed(wind_spd_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• Relative Humidity out of range error(relh_out_of_range_error)
• Mean Relative Humidity(relh_mean)
• Air Temperature Hardware Error(temp_hardware_error)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)
• Time offset of tweaks from base_time(time_offset)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Air Temperature out of range error(temp_out_of_range_error)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Minimum Wind Direction(wind_dir_min)
• Wind Direction out of range error(wind_dir_out_of_range_error)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Std Dev of Wind Direction(wind_dir_sd)
• Maximum Wind Direction(wind_dir_max)
• Maximum Wind Speed(wind_spd_max)
• Relative humidity maximum(relh_max)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Air Temperature(temp_sd)
• Temperature minimum(temp_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Mean Vapor Pressure(vap_pres_mean)
• base time(base_time)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Wind Speed out of range error(wind_spd_out_of_range_error)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature maximum(temp_max)
• Minimum Wind Speed(wind_spd_min)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Wind Speed(wind_spd_sd)
• Mean Wind Speed(wind_spd_mean)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Minimum Dew Point Temperature(dew_pt_temp_min)
• Barometric Pressure(atmos_pressure)
• lon(lon)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Relative humidity minimum(relh_min)
• lat(lat)
• Dummy altitude for Zeb(alt)
• Maximum Vapor Pressure(vap_pres_max)

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.

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

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

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

• Standard Deviation of 40m Temperature(T40M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 40m Average Temperature(T40M_AVG)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• 40m Average Relative Humidity(RH40M_AVG)
• 40m Average Calculated Dew Point(DP40M_AVG)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 40m Average QLI Reference Temperature(RefT40M_AVG)

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.

• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)

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.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

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.

• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• 20m Average Temperature(T20M_AVG)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 20m Average Relative Humidity(RH20M_AVG)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 20m Average Calculated Dew Point(DP20M_AVG)
• Standard Deviation of 20m Temperature(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.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(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.

• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 2m Average Temperature(T2M_AVG)
• Standard Deviation of 2m Temperature(T2M_STD)
• 2m Average Calculated Dew Point(DP2M_AVG)

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.

• 10m Average Calculated Dew Point(DP10M_AVG)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 10m Average Relative Humidity(RH10M_AVG)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)

NSA/METTWR/C1 - Instrument problem

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

• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 2m Vector Averaged Wind Direction(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.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

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

Data in error due to heavy snow during blizzard conditions.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(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.

• Elevation angle of Beam 4 for WINDS data(elevation4)
• Power offset(power)
• Average Interval(avgint)
• lon(lon)
• Number of Values Required for Consensus, Beam 4(nrcns4)
• Number of values that passed consensus, beam 2(ncns2)
• Azimuth of Beam 2(azimuth2)
• Elevation angle of Beam 0 for WINDS data(elevation0)
• Beam 1 radial wind speed(vel1)
• Sample Rate(sampr)
• Rx Bandwidth Switch Code(bswitch)
• Height Index(range_gate)
• Signal to Noise Ratio, Beam 4(snr4)
• Azimuth of Beam 4 for WINDS data(azimuth4)
• Number of Values Required for Consensus, Beam 0(nrcns0)
• Number of spectra/ave int, Beam 2(nrec2)
• Signal to Noise Ratio, Beam 0(snr0)
• Azimuth of Beam 0(azimuth0)
• Array of heights for each sample time(height_p)
• Number of Values Required for Consensus, Beam 1(nrcns1)
• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• Azimuth of Beam 1(azimuth1)
• Number of valid heights(nheight)
• Oblique FFT Bandwidth(oband)
• Elevation angle of Beam 1 for WINDS data(elevation1)
• Number of Individual Spectra/Average Spectrum(nspc)
• Beam 0 radial wind speed(vel0)
• Oblique Velocity Spectral Resolution(ovsr)
• Number of values that passed consensus, beam 1(ncns1)
• Beam 4 radial wind speed(vel4)
• copolar signal to noise ratio(snr1)
• Number of Coherent Samples/spectral point(ncoh)
• Number of spectra/ave int, Beam 1(nrec1)
• Horizontal wind speed(spd)
• Elevation angle of Beam 2 for WINDS data(elevation2)
• U-component(u_wind)
• Vertical Velocity Spectral Resolution(vvsr)
• lat(lat)
• Number of values that passed consensus, beam 0(ncns0)
• V-component(v_wind)
• Height of Center of First Range Gate(rgf)
• Number of Values Required for Consensus, Beam 2(nrcns2)
• Interpulse Period(ipp)
• Number of spectra/ave int, Beam 0(nrec0)
• Number of spectra/ave int, Beam 4(nrec4)
• Beam 3 radial wind speed(vel3)
• Number of Pulse Code Bits(pcbits)
• Number of values that passed consensus, beam 4(ncns4)
• Ave snr*10 level, Beam 2(snr2)
• Elevation angle of Beam 3 for WINDS data(elevation3)
• Range Gate Spacing(rgs)
• Individual Spectrum Integration Time(sitime)
• base time(base_time)
• Height of Center of Last Range Gate(rgl)
• Number of Values Required for Consensus, Beam 3(nrcns3)
• Delay Time to 1st Gate(dly)
• Time Domain Integration Time(tditime)
• Vertical FFT Bandwidth(vband)
• Pulse Repetition Frequency(prf)
• Horizontal wind direction(dir)
• Azimuth of Beam 3 for WINDS data(azimuth3)
• Ave Time per Average Spectra.(spcavetim)
• Number of values that passed consensus, beam 3(ncns3)
• Beam 2 radial wind speed(vel2)
• Pulse Length(plen)
• Signal to Noise Ratio, Beam 3(snr3)
• Number of spectra/ave int, Beam 3(nrec3)

• JPG data stream - documentation not supported(JPEG data stream - documentation not yet available)

• lat(lat)
• Dummy altitude for Zeb(alt)
• Number of Values Required for Consensus, Beam 0(nrcns)
• Number of Values that Passed Consensus, Beam 0 Virtual Temperature(ncns_virtual_temp)
• virtual_temp_corr(virtual_temp_corr)
• base time(base_time)
• lon(lon)
• Array of heights for the range gates(height)
• Signal to Noise Ratio, Corrected Beam 0 Virtual Temperature(snr_virtual_temp_corr)
• Beam 0 virtual temperature(virtual_temp)
• Number of Values that Passed Consensus, Corrected Beam 0 Virtual Temperature(ncns_virtual_temp_corr)
• Number of pulses/ave int, Beam 0(nrec)
• Sample Rate(sampr)
• Vertical wind velocity(vert_v)
• Signal to Noise Ratio, Vertical wind velocity(snr_vert_v)
• Time offset of tweaks from base_time(time_offset)
• Signal to Noise Ratio, Beam 0 Virtual Temperature(snr_virtual_temp)
• Average Interval(avgint)
• Range Gate Spacing(rgs)
• Number of Values that Passed Consensus, Vertical wind velocity(ncns_vert_v)

• Individual Spectrum Integration Time(sitime)
• Time Domain Integration Time(tditime)
• Oblique FFT Bandwidth(oband)
• Vertical FFT Bandwidth(vband)
• Signal to Noise Ratio of the RASS Signal(snr)
• Number of valid heights(nheight)
• Radial Velocity Spectral Resolution(vsr)
• Mean atmospheric vertical velocity(mdf)
• Height of Center of Last Range Gate(rgl)
• lat(lat)
• Number of Pulse Code Bits(pcbits)
• Beam Number(beam)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Number of Coherent Samples/spectral point(ncoh)
• base time(base_time)
• Number of Individual Spectra/Average Spectrum(nspc)
• elevation(elevation)
• Rx Bandwidth Switch Code(bswitch)
• Sample Rate(sampr)
• Delay Time to 1st Gate(dly)
• Range Gate Spacing(rgs)
• Array of heights for each sample time(height_t)
• 1000 * log10(noise signal level: vert vel)(noise)
• Pulse Repetition Frequency(prf)
• Spectral Width: vert velocity(specw)
• Height Index(range_gate)
• Pulse Length(plen)
• Dummy altitude for Zeb(alt)
• Ave Time per Average Spectra. Also known as dwell.(spcavetime)
• Height of Center of First Range Gate(rgf)
• Interpulse Period(ipp)

• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• base time(base_time)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Preliminary cloud base height(preliminary_cbh)
• Laser Temperature(laser_temp)
• time(time)
• lon(lon)
• Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
• Number of laser shots recorded(shots_summed)
• Background Signal(background_signal)
• value represents date of last configuration change as yyyymmdd(property)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Voltage level which operates the thermistor(voltage_10)
• Number of laser pulses summed during measurement interval(shots_sum)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Filter Temperature(filter_temp)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Voltage level which operates the A/D card and the detector(voltage_05)
• range(range)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Laser output energy per pulse(energy_monitor)
• Array of heights for the range gates(height)
• Voltage level which operates the energy monitor(voltage_15)
• Instrument Temperature(instrument_temp)
• Angle of inclination with respect to horizontal(transceiver_altitude_angle)
• required to correct raw counts for detector deadtime prior to all other
  corrections.(deadtime_correction)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Time offset of tweaks from base_time(time_offset)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• lat(lat)
• Aerosol backscatter coefficient at 355 nm(backscatter)

• Filter Temperature(filter_temp)
• time(time)
• Laser output energy per pulse(energy_monitor)
• Laser Temperature(laser_temp)
• range(range)
• Background Signal(background_signal)
• Array of heights for the range gates(height)
• Preliminary cloud base height(preliminary_cbh)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• base time(base_time)
• Instrument Temperature(instrument_temp)
• Voltage level which operates the A/D card and the detector(voltage_05)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Time offset of tweaks from base_time(time_offset)
• lon(lon)
• Voltage level which operates the energy monitor(voltage_15)
• Attenuated backscatter(detector_counts)
• Voltage level which operates the thermistor(voltage_10)
• lat(lat)
• Detector Temperature(detector_temp)
• Number of laser shots recorded(shots_summed)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Dummy altitude for Zeb(alt)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)

• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Flag indicating moisture sensor status(wetWindowFlag)
• Retrieved cloud liquid water content(liquidWaterContent)
• Dummy altitude for Zeb(alt)
• Cloud base height(cloudBaseHeight)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Surface absolute temperature at instrument(surfaceTemperature)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Lifting condensation level(liftingCondensationLevel)
• Interpolated dewpoint temperature(dewpointTemperature)
• Retrieved liquid water path(liquidWaterPath)
• Equilibrium level pressure(equilibriumLevelPres)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• lon(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• air temperature (NGM250 predicted)(temperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Retrieved water vapor density(waterVaporDensity)
• time(time)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Level of free convection pressure(levelFreeConvectionPres)
• Microwave brightness temperature(brightnessTemperature)
• Data quality flags(dataQualityFlags)
• Internal blackbody reference temperature(blackbodyTemperature)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Derived virtual temperature(virtualTemperature)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Frequency(frequency)
• base time(base_time)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• lat(lat)
• Convective Available Potential Energy(cape)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Level of free convection(levelFreeConvection)
• Surface pressure at instrument(surfacePressure)
• Array of heights for the range gates(height)
• Surface relative humidity at instrument(surfaceRelativeHumidity)
• elevation(elevation)
• Time offset of tweaks from base_time(time_offset)
• Derived relative humidity(relativeHumidity)
• azimuth(azimuth)
• Equilibrium level(equilibriumLevel)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

• Time offset of tweaks from base_time(time_offset)
• Spectral Data (signal strength/freq int)(spc_amp)
• Dummy altitude for Zeb(alt)
• lon(lon)
• base time(base_time)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Array of heights for the range gates(height)
• lat(lat)
• Particle radius at logarithmic center of bin(bins)

• Mean acoustic speed(smdf)
• Dummy altitude for Zeb(alt)
• lon(lon)
• base time(base_time)
• Beam 0 virtual temperature(virtual_temp)
• Signal to Noise Ratio: acoustic(ssnr)
• Spectral Width: vert velocity(specw)
• Mean atmospheric vertical velocity(mdf)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Signal to Noise Ratio of the RASS Signal(snr)
• Array of heights for the range gates(height)
• 1000 * log10(noise signal level: vert vel)(noise)
• lat(lat)
• Acoustic Spectral Width(sspecw)
• Time offset of tweaks from base_time(time_offset)

• 40m Average QLI Reference Temperature(RefT40M_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 15 minute Present Weather Code(PwCod15mi)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Temperature(CMHTemp)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• lon(lon)
• lat(lat)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 2m Average QLI Input Voltage(Volt2M_AVG)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 10m Average Relative Humidity(RH10M_AVG)
• Present Weather Sensor Alarm(PWSAlarm)
• Dummy altitude for Zeb(alt)
• 20m Average Relative Humidity(RH20M_AVG)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 1 minute Average Visibility(AvgVis1mi)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Instant Present Weather Code(InstPwCod)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)
• 40m Average Calculated Dew Point(DP40M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 1 hour Present Weather Code(PwCod1hr)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 10m Average Calculated Dew Point(DP10M_AVG)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)
• 2m Average Temperature(T2M_AVG)
• 2m Average Calculated Dew Point(DP2M_AVG)
• Cumulative Snow Sum(CumSnow)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• 20m Average Calculated Dew Point(DP20M_AVG)
• Average X Component of Sonic Wind Speed(SonicX_AVG)
• 20m Average QLI Reference Temperature(RefT20M_AVG)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Standard Deviation of 2m Temperature(T2M_STD)
• base time(base_time)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10 minute Average Visibility(AvgVis10m)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• 20m Average Temperature(T20M_AVG)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Cumulative Water Sum(CumH2O)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• 40m Average Relative Humidity(RH40M_AVG)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 40m Average Temperature(T40M_AVG)
• Precipitation Rate(PcpRate)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Standard Deviation of 40m Temperature(T40M_STD)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• Time offset of tweaks from base_time(time_offset)
• time(time)
• 2m Average QLI Reference Temperature(RefT2M_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• 20m Average QLI Input Voltage(Volt20M_AVG)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• Datalogger Battery Voltage(Batt_Volt)
• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• Chilled Mirror Dew Point(CMHDP)
• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Atmospheric Pressure(AtmPress)

• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Hot blackbody temperature - apex(HBBapexTemp)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Number of complete (forward+backward) interferogram scans in sample average(coadditionsCount)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Version number of Operational Software(systemReleaseNumber)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Duration of scene view(sceneViewDuration)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Number of views in a sequence(sceneMirPosCount)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Observation longitude(Longitude)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Detector temperature sensed via diode near detector(detectorTemp)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Observation date(dateYYMMDD)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Time (HHMMSS)(timeHHMMSS)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Signal conditioning electronics inside air temperature(SCEtemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Scene mirror motor case temperature(mirrorMotorTemp)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Spare temperature sensor (location TBD)(spareTemp)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• lat(lat)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Observation Altitude(Altitude)
• Blackbody cavity geometry factor(BBcavityFactor)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• AERI instrument data channel number(channelNumber)
• AERI instrument unit serial number(AERIunitNumber)
• time(time)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• lon(lon)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• xxx(dataAvailable)
• base time(base_time)
• Dummy altitude for Zeb(alt)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Number of terms used in finite field of view correction(numberOfTerms)
• Ambient blackbody temperature(ABBbottomTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Time offset of tweaks from base_time(time_offset)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Observation latitude(Latitude)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Stirling cycle cooler current(coolerCurrent)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• AERI ingest computer temperature measured at back panel of computer(computerTemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)

• lat(lat)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Julian Day including day and fraction of day(JulianDay)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• lon(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Observation latitude(Latitude)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Version number of Operational Software(systemReleaseNumber)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset of tweaks from base_time(time_offset)
• base time(base_time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Wave number(wnum)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time (HHMMSS)(timeHHMMSS)
• Dummy altitude for Zeb(alt)
• BB Support Structure Temperature(BBsupportStructureTemp)
• time(time)
• Mean of radiance spectra ensemble(mean_rad)
• Duration of scene view(sceneViewDuration)
• Observation longitude(Longitude)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Observation date(dateYYMMDD)

• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Time (HHMMSS)(timeHHMMSS)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Wave number in reciprocal centimeters(wnumsum3)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Time offset of tweaks from base_time(time_offset)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• lat(lat)
• Wave number in reciprocal centimeters(wnumsum7)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Wave number in reciprocal centimeters(wnumsum6)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Wave number in reciprocal centimeters(wnumsum13)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Observation longitude(Longitude)
• xxx(dataAvailable)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Wave number in reciprocal centimeters(wnumsum2)
• Observation latitude(Latitude)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Wave number in reciprocal centimeters(wnumsum12)
• time(time)
• Wave number in reciprocal centimeters(wnumsum1)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• AERI instrument data channel number(channelNumber)
• Wave number in reciprocal centimeters(wnumsum9)
• Ambient air temperature at hatch opening(outsideAirTemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• base time(base_time)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Wave number in reciprocal centimeters(wnumsum5)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• AERI instrument unit serial number(AERIunitNumber)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Observation date(dateYYMMDD)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Version number of Operational Software(systemReleaseNumber)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Wave number in reciprocal centimeters(wnumsum11)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• lon(lon)
• Observation Altitude(Altitude)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Wave number in reciprocal centimeters(wnumsum4)
• Duration of scene view(sceneViewDuration)
• Wave number in reciprocal centimeters(wnumsum8)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• Dummy altitude for Zeb(alt)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Wave number in reciprocal centimeters(wnumsum14)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Wave number in reciprocal centimeters(wnumsum10)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Character string containing instrument name(instrumentUnitNumber)

• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz Blackbody signal(bb23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• (tknd)
• Actual Azimuth(actaz)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Blackbody kinetic temperature(tkbb)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Temperature correction coefficient at 31.4 GHz(tc31)
• base time(base_time)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz blackbody(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• lon(lon)
• Dummy altitude for Zeb(alt)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blac2body+noise injection signal(bbn31)
• Actual elevation angle(actel)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• 23.8 GHz sky signal(tipsky23)
• Ambient temperature(tkair)
• lat(lat)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Time offset of tweaks from base_time(time_offset)

• Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
• Third cloud base height(third_cbh)
• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• Flag indicating aeri retrieval status(status_flag)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Millivolts at internal ADC input (0 to 2500)(background_light)
• range(range)
• Vertical visibility(vertical_visibility)
• lon(lon)
• Degrees from vertical (0 to +90)(tilt_angle)
• Altitude of highest signal(alt_highest_signal)
• Lowest cloud base height detected.(first_cbh)
• Backscatter sum(sum_backscatter)
• lat(lat)
• Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
• Detection status. See details(detection_status)
• Warning and alarm status bits(status_string)
• 6 character string describing instrument measurement parameters(measurement_parameters)
• base time(base_time)
• Second lowest cloud base height(second_cbh)
• Laser temperature(laser_temperature)
• GPS raw data filename(filename)
• Millivolts at internal ADC input(window_contamination)

• Number of valid heights(nheight)
• Rx Bandwidth Switch Code(bswitch)
• Range Gate Spacing(rgs)
• Ave Time per Average Spectra.(spcavetim)
• Delay Time to 1st Gate(dly)
• elevation(elevation)
• Spectral Data (signal strength/freq int)(spc_amp)
• Interpulse Period(ipp)
• Radial Velocity Spectral Resolution(vsr)
• lon(lon)
• Height of Center of Last Range Gate(rgl)
• Time offset of tweaks from base_time(time_offset)
• Time Domain Integration Time(tditime)
• base time(base_time)
• Vertical FFT Bandwidth(vband)
• Sample Rate(sampr)
• Height of Center of First Range Gate(rgf)
• Dummy altitude for Zeb(alt)
• Pulse Repetition Frequency(prf)
• Array of heights for each sample time(height_t)
• Oblique FFT Bandwidth(oband)
• Number of Pulse Code Bits(pcbits)
• Number of Coherent Samples/spectral point(ncoh)
• Number of Individual Spectra/Average Spectrum(nspc)
• Individual Spectrum Integration Time(sitime)
• Particle radius at logarithmic center of bin(bins)
• Height Index(range_gate)
• lat(lat)
• Beam Number(beam)
• Pulse Length(plen)

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

• Wave number(wnum)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time offset of tweaks from base_time(time_offset)
• Version number of Operational Software(systemReleaseNumber)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• time(time)
• base time(base_time)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Dummy altitude for Zeb(alt)
• Time (HHMMSS)(timeHHMMSS)
• lon(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Observation longitude(Longitude)
• Character string containing instrument name(instrumentUnitNumber)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• AERI instrument unit serial number(AERIunitNumber)
• Julian Day including day and fraction of day(JulianDay)
• lat(lat)
• Mean of radiance spectra ensemble(mean_rad)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Observation date(dateYYMMDD)
• Duration of scene view(sceneViewDuration)
• Observation latitude(Latitude)

• Delay to First Range Gate(StartGateDelay)
• Time offset of tweaks from base_time(time_offset)
• Receiver Cal Time Stamp(RxCalTimeStamp)
• Number of Coherent Integrations(NumCoherentIntegrations)
• Max. height of clutter removal(ClutterHeight)
• Circular Depolarization Ratio(CircularDepolarizationRatio)
• DC Filtering ON-OFF Status(DCFilterONOFF)
• Average Noise Level (S/N<0)(AvgNoiseLevel)
• Pulse Width(PulseWidth)
• Current Receiver Number(ReceiverNumber)
• Receiver Gain(RxGain)
• RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
• Windowing ON-OFF Status(WindowingONOFF)
• MMCR Spectral Width(SpectralWidth)
• Gate Spacing(GateSpacing)
• Mean Noise Level(NoiseLevel)
• Receiver 290K Level(Rx290KLevel)
• Number of Receiver(NumReceivers)
• Minimum detectable reflectivity(MinimumDetectableReflectivity)
• TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
• MMCR Reflectivity(Reflectivity)
• Receiver Cal Check Level(CalCheckLevel)
• Receiver Cal Check Time Stamp(CalCheckTime)
• Number of Code Bits(NumCodeBits)
• lon(lon)
• Inter-Pulse Period(InterPulsePeriod)
• Range Corrected Calibrated Power(RangeCorrectedPower)
• Dummy altitude for Zeb(alt)
• Receiver Sky Noise(SkyNoiseLevel)
• Time associated with hourly averaged values(TimeAvg)
• Data Quality Status(DataQualityStatus)
• lat(lat)
• Operating Set for this Record(ModeNum)
• Radar Constant(RadarConstant)
• radar mode char identifier(ModeDescription)
• Power (uncalibrated)(Power)
• Receiver Mode(ReceiverMode)
• Number of Spectral Averages(NumSpectralAverages)
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• base time(base_time)
• Number of Gate Heights(NumHeights)
• Number of Points in FFT(NumFFT)
• Array of heights for each power(heights)
• Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
• time(time)
• Signal to Noise Ratio(SignalToNoiseRatio)

NSA/METTWR/C1 - CMH data intermittently poor

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

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)

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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Standard Deviation of 40m Temperature(T40M_STD)
• 15 minute Present Weather Code(PwCod15mi)
• 20m Average Temperature(T20M_AVG)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• 20m Average Relative Humidity(RH20M_AVG)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• 2m Average Temperature(T2M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)
• 2m Average Calculated Dew Point(DP2M_AVG)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Cumulative Water Sum(CumH2O)
• 40m Average QLI Reference Temperature(RefT40M_AVG)
• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• 1 minute Average Visibility(AvgVis1mi)
• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• 2m Average Relative Humidity(RH2M_AVG)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 10m Average Relative Humidity(RH10M_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• Standard Deviation of 2m Temperature(T2M_STD)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• 10m Average Temperature(T10M_AVG)
• 1 hour Present Weather Code(PwCod1hr)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Cumulative Snow Sum(CumSnow)
• 40m Average Relative Humidity(RH40M_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Present Weather Sensor Alarm(PWSAlarm)
• 20m Average QLI Input Voltage(Volt20M_AVG)
• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• Instant Present Weather Code(InstPwCod)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• 2m Average QLI Input Voltage(Volt2M_AVG)
• 20m Average Calculated Dew Point(DP20M_AVG)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 40m Average Temperature(T40M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• Precipitation Rate(PcpRate)
• Standard Deviation of 10m Temperature(T10M_STD)
• Average X Component of Sonic Wind Speed(SonicX_AVG)
• 10m Average Calculated Dew Point(DP10M_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• 2m Average QLI Reference Temperature(RefT2M_AVG)
• 20m Average QLI Reference Temperature(RefT20M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)
• 10 minute Average Visibility(AvgVis10m)
• 40m Average Calculated Dew Point(DP40M_AVG)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)

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.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Chilled Mirror Dew Point(CMHDP)
• Instant Present Weather Code(InstPwCod)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Chilled Mirror Temperature(CMHTemp)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)

NSA/METTWR/C1 - CMH Data Missing

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

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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

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

• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 2m Arithmetic Mean Wind Speed(WS2M_S_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.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Chilled Mirror Dew Point(CMHDP)
• Instant Present Weather Code(InstPwCod)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Chilled Mirror Temperature(CMHTemp)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)
• Atmospheric Pressure(AtmPress)

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.

• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• 10m Vector Averaged Wind Direction(WD10M_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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(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.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Instant Present Weather Code(InstPwCod)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Precipitation Rate(PcpRate)
• Present Weather Sensor Alarm(PWSAlarm)

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.

• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 2m Arithmetic Mean Wind Speed(WS2M_S_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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - 10m Wind Speed Low

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

• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_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.

• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_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.

• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)

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

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

• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)

NSA/METTWR/C1 - CMH Data Missing

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

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(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.

• Atmospheric Pressure(AtmPress)

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.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Instant Present Weather Code(InstPwCod)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)

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.

• 10m Average Calculated Dew Point(DP10M_AVG)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 10m Average Relative Humidity(RH10M_AVG)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)

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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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

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

• 10m Average Calculated Dew Point(DP10M_AVG)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 10m Average Relative Humidity(RH10M_AVG)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)

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.

• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 2m Average Temperature(T2M_AVG)
• Standard Deviation of 2m Temperature(T2M_STD)
• 2m Average Calculated Dew Point(DP2M_AVG)

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.

• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 40m Vector Averaged Wind Direction(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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)

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.

• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 40m Vector Averaged Wind Direction(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.

• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 40m Vector Averaged Wind Direction(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.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Instant Present Weather Code(InstPwCod)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)

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.

• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 20m Average Relative Humidity(RH20M_AVG)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 20m Average Calculated Dew Point(DP20M_AVG)

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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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.

• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 2m Vector Averaged Wind Direction(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.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/TOWER - Mislabeled tower sensors

The NSA tower data displayed on the local computer screen had the height 
mislabeled. Data written to files were correct.  When the data acquisition 
program was fixed on 22 OCT 1998, only the computer display was changed.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Wind Direction(wind_dir_max)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Relative humidity minimum(relh_min)
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Speed(wind_spd_max)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Relative humidity maximum(relh_max)
• GPS raw data filename(filename)
• Mean Relative Humidity(relh_mean)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Temperature maximum(temp_max)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Wind Speed(wind_spd_mean)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dummy altitude for Zeb(alt)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• null(Raw data stream - documentation not supported)

NSA/METTOWER - Questionable NSA Met-tower wind data

The data analysis software for the NSA Met_tower system was upgraded at 2200 GMT
on 8 SEP 1999.  The upgrade included replacement of missing data with -99.99's
when the routine that polled the Met-tower sensors timed out.  This 
resulted in large negative spikes in the 1-min averages.  These spikes 
almost always occurred during the first several 1-min periods of a 
half-hour data processing routine.
On 25 OCT 1999 at 2300 the routine that replaced missing data was changed to 
insert the previous 1-min averaged data instead of -99.99.  Since at the most
only one or two values are missing in ay averaging period, this change 
results in a reasonable estimate of the true mean values

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Wind Direction(wind_dir_max)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Relative humidity minimum(relh_min)
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Speed(wind_spd_max)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Relative humidity maximum(relh_max)
• GPS raw data filename(filename)
• Mean Relative Humidity(relh_mean)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Temperature maximum(temp_max)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Wind Speed(wind_spd_mean)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dummy altitude for Zeb(alt)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• null(Raw data stream - documentation not supported)

NSA/METTOWER - Questionable NSA Met-tower wind data

The data analysis software for the NSA Met-tower system was upgraded at 2200 GMT
on 8 SEP 1999.  The upgrade included insertion of  -99.99's for the wind vectors 
when the wind speed or direction were either missing or equal to 0.  This 
resulted in incorrect vector averaged wind speed, wind direction, and 
standard deviation of wind direction.  When this occurred, the 
vector-averaged wind speed and standard deviation of wind direction 
were often abnormally high and the vector-averaged wind direction
 was often approximately 225 deg.  Starting at 2300 GMT on 25 OCT 99
missing wind data were replaced by the previous 1-min average and 
starting at 2200 GMT on 15 NOV 1999 the computed wind vectors were 
used whenever wind speeds or wind directions were 0.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Wind Direction(wind_dir_max)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Relative humidity minimum(relh_min)
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Speed(wind_spd_max)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Relative humidity maximum(relh_max)
• GPS raw data filename(filename)
• Mean Relative Humidity(relh_mean)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Temperature maximum(temp_max)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Wind Speed(wind_spd_mean)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dummy altitude for Zeb(alt)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• null(Raw data stream - documentation not supported)

NSA/METOWER - Reprocess: Incorrect NSA wind direction minima and maxima

From the time of installation of the NSA C1 Met-tower system on 24 MAR 1998
until 29 NOV 1999 all wind direction minima and maxima were reported as raw
(unrotated) data.  In order to obtain correct minima and maxima 30 deg must
be subtracted from the value.  All mean wind directions were computed from
rotated (corrected) data.

• Minimum Dew Point Temperature(dew_pt_temp_min)
• Wind Speed out of range error(win_spd_out_of_range_error)
• Mean Dew Point Temperature(dew_pt_temp_mean)
• Wind Direction out of range error(win_dir_out_of_range_error)
• Vector-averaged Wind Direction(wind_dir_vec_avg)
• base time(base_time)
• Dew Point Temperature out of range error(dew_pt_temp_out_of_range_error)
• Number of timeouts reading the met tower data by height(read_timeout_count)
• Maximum Wind Direction(wind_dir_max)
• Air Temperature Hardware Error(temp_hardware_error)
• Time offset of tweaks from base_time(time_offset)
• PTB Serial Error(atmos_pressure_PTB_serial_error)
• Barometric Pressure(atmos_pressure)
• Read Timeout Error(atmos_pressure_read_timeout_error)
• Air Temperature out of range error(temp_out_of_range_error)
• Minimum Wind Speed(wind_spd_min)
• Std Dev of Dew Point Temperature(dew_pt_temp_sd)
• Relative humidity minimum(relh_min)
• Minimum Wind Direction(wind_dir_min)
• Maximum Wind Speed(wind_spd_max)
• Vapor Pressure out of range error(vap_pres_out_of_range_error)
• lon(lon)
• lat(lat)
• Std Dev of Wind Speed(wind_spd_sd)
• Std Dev of Air Temperature(temp_sd)
• Minimum Vapor Pressure(vap_pres_min)
• Std Dev of Vapor Pressure(vap_pres_sd)
• Internal Temperature out of range error(internal_temp_out_of_range_error)
• Relative humidity maximum(relh_max)
• GPS raw data filename(filename)
• Mean Relative Humidity(relh_mean)
• Maximum Vapor Pressure(vap_pres_max)
• Relative Humidity out of range error(relh_out_of_range_error)
• Temperature maximum(temp_max)
• Mean Vapor Pressure(vap_pres_mean)
• Vector-averaged Wind Speed(wind_spd_vec_avg)
• Temperature minimum(temp_min)
• Std Dev of Wind Direction(wind_dir_sd)
• Mean Wind Speed(wind_spd_mean)
• Maximum Dew Point Temperature(dew_pt_temp_max)
• Dummy altitude for Zeb(alt)
• Dew Point Temperature Hardware Error(dew_pt_hardware_error)
• Mean Air Temperature or Hardware Error(temp_mean)
• Out of Range Error(atmos_pressure_out_of_range_error)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Internal Voltage out of range error(internal_voltage_out_of_range_error)

• null(Raw data stream - documentation not supported)