SGP/THWAPS/C1 - THWAPS C1 miscalibrated

Power outages apparently led to the THWAPS HMP233 temperature and RH sensor
being replaced at C1.  The power went out at 0340 on 3/9 was restored at
0635 and went out again at 2025.

The new HMP233 appears to be incorrectly calibrated and all temperature
data since its installation are wrong.  If I am correct about the nature
of the calibration problem, the true average temperature can be recovered
from that recorded by a linear conversion, but I don't think its worth the
trouble.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
• Temperature, air, 60-m height, 30-min intervals(temp)

SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems

Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.

• Altitude above mean sea level(alt)
• time_offset
• Wind speed, surface, 1-min avg(wspd)
• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• sd_pres
• sd_vap_pres
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
• East longitude(lon)
• vbat
• sd_wdir
• base_time
• North latitude(lat)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Pressure, atmospheric, constant value of model level, RUC model output(pres)
• Temperature, air, 60-m height, 30-min intervals(temp)
• Wind direction, at 10-m height, 30-min intervals(wdir)

SGP/THWAPS/C1 - RH Sensor Calibration

The analog output for the T/RH probe was incorrectly calibrated.  This
caused excessively high readings of RH.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)

SGP/THWAPS/C1 - Minor bias in humidity

The THWAPS humidity sensor output was scaled so that the instrument output
voltage range (0-1VDC) represented 0-100 %RH. Comparisons with the
co-located chilled mirror sensor at the CF suggested that the THWAPS RH
sensor was reading artifically low at high humidities because of this 100
%RH maximum. 
   
The scaling of the system was changed so that 0-1 VDC now represents 0-110
%RH. This resulted in a slight loss of precision in the measurements, but
since the RH measurement is only accurate to 2-3 %RH at best, this isn't a
significant problem.

• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)

SGP/THWAPS/C1 - Minor bias in saturation vapor pressure

The saturation vapor correction when temps are below 0C contained an error
in the multiplier.  The incorrect multiplier only equates to an error of
0.01 kPa which is less than the stated uncertainty of the measurement (+/-
0.035 kPa).

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)

SGP/THWAPS/C1 - RH Data Incorrect

The RH data was incorrect during the times listed.  Reason unknown.  The sensor recovered 
on its own.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)

SGP/THWAPS/C1 - Barometer intermittent

Intermittent dropouts on the barometer data were occurring, with data reading low or 
missing.  Loose wiring was the probable culprit.

In most instances, only 1 minute of data was missing. Linear interpolation between the 
last known good point and the first good point following the dropout can be accomplished.

• Pressure, atmospheric, constant value of model level, RUC model output(pres)

SGP/THWAPS/C1 - Time stamp of data record incorrect

Due to problems with the collector system, the datalogger was being time synched 
inappropriately.  This problem was intermittent and did not affect every time stamp.  The worst 
case time adjustments were approximately +/- 7 minutes.  These were infrequent and most of 
the time adjustments were less than 7 minutes.

• time_offset
• base_time

SGP/THWAPS/C1 - Wind speed incorrect

The wind sensor was reporting 0 m/s winds for excessive periods of time and appeared to 
measure lower wind speeds than nearby co-located wind sensors.  Sensor was replaced.

• Wind speed, surface, 1-min avg(wspd)

SGP/MET/E9 - Wind Speed Data Incorrect

Wind speed sensor reference wire became detached.  This caused all wind sensor data to 
report near 0 m/s.

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

SGP/MET/E21 - Wind Sensor Inoperative Due to Ice

Due to an ice storm the wind sensor was inoperative.

• wdir_vec_std
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• qc_wspd_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_std

SGP/MET/E11 - Intermittent incorrect windspeed

Starting on 10/20 the wind speed values intermittently flatlined.  Site operations 
reseated cable on 11/1.

• qc_wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_mean
• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_wspd_vec_mean

SGP/MET/E13 - PWD data incorrect/missing

Data collection problems during the time period specified resulted in incorrect or missing 
PWD data.

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

SGP/MET/E13 - Missing PWD data

PWD data were missing due to an accidental reset on the instrument.

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

SGP/MET/E21 - TimeCheck Error

Starting on 2010-06-07 the E21 system clock started drifting until the problem was 
corrected on 2010-06-29.  The maximum daily offset reported in the collection logs were:

Jun 7 offset:	  -5.04
Jun 8  Offset:	  -267.449039
Jun 9  Offset:	  -541.038624
Jun 10 Offset:	  -814.469141
Jun 11 Offset:	  -1076.862114
Jun 12 Offset:	  -1350.330223
Jun 13 Offset:	  -1623.639335
Jun 14 Offset:	  -1897.047754
Jun 15 Offset:	  -2170.552312
Jun 16 Offset:	  -2422.130746
Jun 17 Offset:	  -2684.607495
Jun 18 - Jun 22 (unknown)
Jun 23 Offset:	  -4204.730579

If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect 
time. The met data will be correct but the corresponding time stamp cannot be accurately 
known or simply corrected.

• wdir_vec_std
• qc_wdir_vec_mean
• Wind speed vector mean(wspd_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• qc_wspd_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_atmos_pressure
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Atmospheric pressure(atmos_pressure)
• tbrg_precip_total
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_std
• qc_temp_mean
• time
• base_time
• qc_rh_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• time_offset
• qc_vapor_pressure_mean
• Temperature mean(temp_mean)
• qc_tbrg_precip_total
• qc_time
• qc_tbrg_precip_total_corr
• qc_wspd_arith_mean

SGP/MET/E9 - Time-stamp uncertainty

Between 20100503 and 20100507 the sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks 
were drifting outside the allowable +/-3 seconds.  During the specified period, the 
swings ranged from -326 to +637 seconds.

• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_wdir_vec_mean
• qc_temp_mean
• Wind speed vector mean(wspd_vec_mean)
• qc_wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• qc_wspd_vec_mean
• qc_rh_mean
• time
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• qc_tbrg_precip_total
• qc_vapor_pressure_mean
• qc_tbrg_precip_total_corr
• Temperature mean(temp_mean)
• wdir_vec_std
• Vapor pressure mean, calculated(vapor_pressure_mean)
• base_time
• tbrg_precip_total
• time_offset
• qc_wspd_arith_mean
• qc_time
• qc_atmos_pressure
• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/MET/E11 - Wind speed incorrect

Starting on 05/14 the wind speed values at E11 intermittently flat-lined.  The connections 
were reseated 5/18.

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

SGP/MET/E7 - T/RH values incorrect

The temperature, RH, and vapor pressure data were incorrect due to a loose connection.

• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)

SGP/MET/E9 - RH probe failure

The T/RH probe failed. The resulting problem led to very unreasonable values of RH (~160%) 
which caused the vapor pressure values to also be incorrect.

• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)

SGP/MET/E13 - Low logger voltage

Low logger voltage was reported. Low voltage may result in data spikes or dropouts.

• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• Vapor pressure mean, calculated(vapor_pressure_mean)
• logger_temp
• temp_std
• vapor_pressure_std
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• pwd_pw_code_15min
• tbrg_precip_total
• pwd_pw_code_1hr
• pwd_pw_code_inst
• Atmospheric pressure(atmos_pressure)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• pwd_cumul_snow
• Wind direction vector mean(wdir_vec_mean)
• rh_std
• logger_volt
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• pwd_err_code

SGP/THWAPS/C1 - T/RH sensor failure

Storm damage caused failure of the temperature/humidity sensor.  Sensor replaced.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
• Temperature, air, 60-m height, 30-min intervals(temp)

SGP/THWAPS/C1 - RH too high

The T/RH sensor was reporting much higher humidity than the sonde station and nearby 
sensors for some sonde launches.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)

SGP/THWAPS/C1 - Incorrect T/RH data

There was a power issue with the T/RH sensor.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Temperature, air, 30-min intervals, standard deviation(sd_temp)
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
• Temperature, air, 60-m height, 30-min intervals(temp)

SGP/MET/E13 - Ice on wind sensor

Wind speed and direction are flat-lined due to ice accumulation on the sensor.

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

SGP/MET/E11/E15/E21/E31/E33/E34/E35/E36/E37/E38/E9 - Ice on wind sensors

Wind data was affected by ice buildup on the sensors. Data during this period should be 
used with caution. Exact times of sensor thaw are unknown.

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

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

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

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

SGP/MET/E9 - Rain gauge clogged

The tipping bucket rain gauge was found to be clogged during bi-weekly maintenance. 
Precipitation data during this time may be suspect.

• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

SGP/MET/E11 - Data logger issue resulted in incorrect data

Data logger voltage dropped too low due to a battery problem. This caused incorrect 
temperature, relative humidity, vapor pressure, and atmospheric pressure data during this time.

• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Atmospheric pressure(atmos_pressure)

SGP/MET/E11 - Missing data due to hardware problem

No data available during this period due to a hardware/communication issue.

• qc_wdir_vec_std
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• time
• North latitude(lat)
• qc_vapor_pressure_mean
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• qc_temp_mean
• qc_wdir_vec_mean
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Altitude above mean sea level(alt)
• time_offset
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• tbrg_precip_total
• qc_atmos_pressure
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_tbrg_precip_total_corr
• qc_rh_mean
• qc_time
• East longitude(lon)
• qc_tbrg_precip_total
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)
• base_time
• qc_wspd_vec_mean

SGP/MET/E11 - Collection problem caused missing data

A data collection problem caused periods of missing data for the times indicated. Between 
3/16 and 3/23, there are short instances of active data, but these values should be used 
with discretion.

• qc_wdir_vec_std
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• time
• North latitude(lat)
• qc_vapor_pressure_mean
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• qc_temp_mean
• qc_wdir_vec_mean
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Altitude above mean sea level(alt)
• time_offset
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• tbrg_precip_total
• qc_atmos_pressure
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_tbrg_precip_total_corr
• qc_rh_mean
• qc_time
• East longitude(lon)
• qc_tbrg_precip_total
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)
• base_time
• qc_wspd_vec_mean

SGP ALL INSTRUMENTS - Icing Event

An icing event (winter storm Cara) passed slowly through the area during this time frame.  
Instruments at the SGP may have been affected by ice accumulation.

• Wind speed vector mean(wspd_vec_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction vector mean(wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)

• pwd_cumul_rain
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Temperature mean(temp_mean)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• temp_std
• pwd_pw_code_15min
• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• logger_temp
• Vapor pressure mean, calculated(vapor_pressure_mean)
• vapor_pressure_std
• pwd_pw_code_1hr
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• pwd_cumul_snow
• pwd_err_code
• tbrg_precip_total
• pwd_pw_code_inst
• Atmospheric pressure(atmos_pressure)
• wdir_vec_std
• rh_std
• logger_volt

• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• wdir_vec_std
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)
• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

• Vapor pressure mean, calculated(vapor_pressure_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• Atmospheric pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

• wdir_vec_std
• Temperature mean(temp_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Atmospheric pressure(atmos_pressure)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• tbrg_precip_total
• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)

SGP/MET/E13 - Data suspect due to system power issues

Issues with power supply to the system caused outages and suspect data during this time.

• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• Vapor pressure mean, calculated(vapor_pressure_mean)
• logger_temp
• temp_std
• vapor_pressure_std
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• pwd_pw_code_15min
• tbrg_precip_total
• pwd_pw_code_1hr
• pwd_pw_code_inst
• Atmospheric pressure(atmos_pressure)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• pwd_cumul_snow
• Wind direction vector mean(wdir_vec_mean)
• rh_std
• logger_volt
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• pwd_err_code

SGP Site Power Outage Due to Winter Storm

On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.

• qc_vapor_pressure_mean
• qc_wdir_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• time_offset
• qc_wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)
• qc_temp_mean
• wdir_vec_std
• tbrg_precip_total
• qc_atmos_pressure
• qc_tbrg_precip_total_corr
• qc_rh_mean
• Temperature mean(temp_mean)
• base_time
• qc_wspd_vec_mean
• qc_wspd_arith_mean
• time
• Wind speed vector mean(wspd_vec_mean)
• qc_time
• East longitude(lon)
• qc_tbrg_precip_total
• North latitude(lat)
• Atmospheric pressure(atmos_pressure)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Altitude above mean sea level(alt)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)

• pwd_cumul_rain
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• Temperature mean(temp_mean)
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• temp_std
• qc_rh_mean
• pwd_pw_code_15min
• qc_tbrg_precip_total_corr
• qc_logger_temp
• Wind direction vector mean(wdir_vec_mean)
• qc_pwd_cumul_rain
• qc_pwd_pw_code_15min
• Vapor pressure mean, calculated(vapor_pressure_mean)
• vapor_pressure_std
• qc_pwd_pw_code_1hr
• qc_pwd_precip_rate_mean_1min
• Altitude above mean sea level(alt)
• pwd_cumul_snow
• North latitude(lat)
• qc_pwd_cumul_snow
• qc_tbrg_precip_total
• qc_vapor_pressure_mean
• tbrg_precip_total
• qc_time
• Atmospheric pressure(atmos_pressure)
• base_time
• qc_wspd_arith_mean
• qc_wdir_vec_std
• rh_std
• logger_volt
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_logger_volt
• qc_temp_mean
• qc_pwd_mean_vis_10min
• qc_pwd_mean_vis_1min
• Wind speed vector mean(wspd_vec_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• logger_temp
• qc_wdir_vec_mean
• pwd_pw_code_1hr
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_atmos_pressure
• qc_wspd_vec_mean
• time_offset
• pwd_err_code
• East longitude(lon)
• qc_pwd_pw_code_inst
• pwd_pw_code_inst
• wdir_vec_std
• time

• Vapor pressure mean, calculated(vapor_pressure_mean)
• qc_wspd_arith_mean
• wdir_vec_std
• qc_wdir_vec_mean
• base_time
• Altitude above mean sea level(alt)
• qc_vapor_pressure_mean
• qc_tbrg_precip_total_corr
• Atmospheric pressure(atmos_pressure)
• East longitude(lon)
• qc_rh_mean
• time_offset
• qc_tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• qc_wspd_vec_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• Wind direction vector mean(wdir_vec_mean)
• qc_wdir_vec_std
• qc_temp_mean
• Wind speed vector mean(wspd_vec_mean)
• time
• qc_time
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• qc_atmos_pressure
• tbrg_precip_total
• North latitude(lat)

• qc_wdir_vec_std
• qc_vapor_pressure_mean
• Altitude above mean sea level(alt)
• qc_wspd_arith_mean
• Temperature mean(temp_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• qc_time
• Atmospheric pressure(atmos_pressure)
• tbrg_precip_total
• Wind direction vector mean(wdir_vec_mean)
• qc_atmos_pressure
• qc_tbrg_precip_total_corr
• qc_tbrg_precip_total
• East longitude(lon)
• base_time
• wdir_vec_std
• time_offset
• qc_wdir_vec_mean
• qc_rh_mean
• Vapor pressure mean, calculated(vapor_pressure_mean)
• qc_wspd_vec_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• time
• Wind speed vector mean(wspd_vec_mean)
• North latitude(lat)
• qc_temp_mean

SGP/MET/E11 - Missing Data

The site computer went down following an ice storm that caused a power outage.  The met 
data was missing for an extended period.

• qc_wdir_vec_std
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• time
• North latitude(lat)
• qc_vapor_pressure_mean
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• qc_temp_mean
• qc_wdir_vec_mean
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Altitude above mean sea level(alt)
• time_offset
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• tbrg_precip_total
• qc_atmos_pressure
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_tbrg_precip_total_corr
• qc_rh_mean
• qc_time
• East longitude(lon)
• qc_tbrg_precip_total
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Temperature mean(temp_mean)
• base_time
• qc_wspd_vec_mean

SGP/MET/E9 - False tips in high winds

The TBRG's were mounted at a height that made them prone to vibrations caused by high 
winds which may have caused false tips.  The end date of this DQR indicates when the rain 
gauge was lowered to mitigate these effects.  

Effects on the total precipitation amounts are assumed to be negligible.

• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

SGP/MET/E11 - False tips in high winds

The TBRG's were mounted at a height that made them prone to vibrations caused by high 
winds which may have caused false tips.  The end date of this DQR indicates when the rain 
gauge was lowered to mitigate these effects.  

Effects on the total precipitation amounts are assumed to be negligible.

• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

SGP/MET/E13 - False tips in high winds

The TBRG's were mounted at a height that made them prone to vibrations caused by high 
winds which may have caused false tips.  The end date of this DQR indicates when the rain 
gauge was lowered to mitigate these effects.  

Effects on the total precipitation amounts are assumed to be negligible.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

SGP/MET/E15 - False tips in high winds

The TBRG's were mounted at a height that made them prone to vibrations caused by high 
winds which may have caused false tips.  The end date of this DQR indicates when the rain 
gauge was lowered to mitigate these effects.  

Effects on the total precipitation amounts are assumed to be negligible.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

SGP/MET/E9 - Wind sensor malfunction

Loose wire contacts and possible bad bearings caused intermittent wind data dropouts 
during this time.

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

SGP/MET/E15 - Tipping bucket rain gauge clogged

During maintenance rounds, debris was found clogging the rain gauge funnel.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

SGP/MET/E11 - Tipping bucket rain gauge clogged

Debris was found obstructing the rain gauge funnel. Precipitation data are incorrect 
during this time.

• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

SGP/MET/E15 - No precipitation recorded

For an unknown reason, the tipping bucket rain gauge did not record precipitation events.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

SGP/MET/E11 - Missing data

Data are missing for an unknown reason.

• qc_wdir_vec_std
• qc_wspd_arith_mean
• Wind direction vector mean(wdir_vec_mean)
• qc_logger_volt
• time
• North latitude(lat)
• qc_vapor_pressure_mean
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• rh_std
• qc_temp_mean
• qc_wdir_vec_mean
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Altitude above mean sea level(alt)
• time_offset
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• logger_volt
• tbrg_precip_total
• qc_atmos_pressure
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_logger_temp
• qc_tbrg_precip_total_corr
• qc_rh_mean
• qc_time
• East longitude(lon)
• qc_tbrg_precip_total
• Temperature mean(temp_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• temp_std
• base_time
• logger_temp
• qc_wspd_vec_mean
• vapor_pressure_std

SGP/MET/E9 - Bad battery

A faulty battery caused periodic missing data.

• qc_temp_mean
• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• qc_tbrg_precip_total
• qc_vapor_pressure_mean
• qc_tbrg_precip_total_corr
• Temperature mean(temp_mean)
• temp_std
• qc_logger_volt
• tbrg_precip_total
• time_offset
• qc_time
• East longitude(lon)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Altitude above mean sea level(alt)
• qc_wdir_vec_mean
• qc_wdir_vec_std
• qc_wspd_vec_mean
• qc_rh_mean
• time
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• North latitude(lat)
• qc_logger_temp
• vapor_pressure_std
• logger_temp
• logger_volt
• rh_std
• wdir_vec_std
• Vapor pressure mean, calculated(vapor_pressure_mean)
• base_time
• qc_wspd_arith_mean
• qc_atmos_pressure

SGP/MET/E13 - Data Spikes

MET went down during some storms and produced some erroneous errors when brought back 
online.

• Temperature mean(temp_mean)
• temp_std

SGP/MET/E13 - Wind Values Incorrect

Wind speed is incorrect after coming back online

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

SGP/THWAPS - RH values low by factor of 1.1

Because of instrument mentor stupidity, all C1 THWAPS RH data collected
from the begin date of this DQR are low by a factor of 1.1.  This error
also will affect the vapor pressure data.  The problem is that the CSI
data logger is expecting the data to be scaled 0-100%RH on the range 0-1V,
but it is now being scaled 0-110%RH on the range 0-1V.

• Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
• Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
• sd_vap_pres
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)