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/E20 - Rain Gauge Cable Chewed by Rodents

The rain gauge cable was damaged by rodents.  At the beginning of the time period, the 
data was falsely indicating nearly constant precipitation. Later it was falsely reporting no 
precipitation during a large rain event.

Data are not recoverable.

• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total

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/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/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/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 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)

NSA/MERGESONDE/C1 - Reprocess: Suspect rh_scaled values

MERGESONDE sometimes uses bad or questionable precipitable water vapor data to scale the 
relative humidity profiles provided by the rh_scaled field. In addition, this bad input 
data is not properly indicated by the vapor_source or qc_rh_scaled fields. This problem 
appears to typically occur when there is moisture impacting the microwave radiometer causing 
large spikes in brightness temperatures. During these periods the rh_scaled values are 
often saturated at 101% for much of the profile.

• vapor_source
• rh_scaled

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 direction vector mean(wdir_vec_mean)
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• 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 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• logger_temp
• Vapor pressure mean, calculated(vapor_pressure_mean)
• 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_1hr
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• pwd_cumul_snow
• pwd_err_code
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• temp_std
• pwd_pw_code_15min
• tbrg_precip_total
• pwd_pw_code_inst
• Atmospheric pressure(atmos_pressure)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• rh_std
• logger_volt
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

• Wind speed vector mean(wspd_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• Atmospheric pressure(atmos_pressure)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Temperature mean(temp_mean)
• wdir_vec_std
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• tbrg_precip_total
• 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 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_cumul_rain
• 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
• Vapor pressure mean, calculated(vapor_pressure_mean)
• qc_pwd_pw_code_15min
• 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
• qc_time
• tbrg_precip_total
• 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)

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/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/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/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