Data Quality Reports for Session: 183146 User: shepherdt1 Completed: 02/01/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D020313.1SGP/THWAPS/C1 - THWAPS C1 miscalibratedsgpthwapsC1.b1Incorrect
D030325.2SGP/THWAPS/B6 - Loss of temperature and RH for 8 hourssgpthwapsB6.b1Incorrect
D030917.21SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problemssgpthwapsB5.b1, sgpthwapsB1.b1, sgpthwapsC1.b1, sgpthwapsB6.b1Missing
D031205.1SGP/THWAPS/B5 - T/RH Sensor FailuresgpthwapsB5.b1Incorrect
D031213.1SGP/THWAPS/B6 - Battery Voltage ProblemsgpthwapsB6.b1Suspect
D041123.1SGP/THWAPS/C1 - RH Sensor CalibrationsgpthwapsC1.b1Incorrect
D050205.5SGP/THWAPS/B5 - Temperature Sensor failuresgpthwapsB5.b1Incorrect
D050209.14SGP/THWAPS/B1 - Wind Data SuspectsgpthwapsB1.b1Suspect
D050209.15SGP/THWAPS/B4 - Wind Data SuspectsgpthwapsB4.b1Suspect
D050209.16SGP/THWAPS/B5 - Wind Data SuspectsgpthwapsB5.b1Suspect
D050209.17SGP/THWAPS/B6 - Wind Data SuspectsgpthwapsB6.b1Suspect
D050812.1SGP/THWAPS/B4 - Minor biases in humidity and saturation vapor pressuresgpthwapsB4.b1Does not affect quality
D050812.12SGP/THWAPS/C1 - Minor bias in saturation vapor pressuresgpthwapsC1.b1Does not affect quality
D050812.4SGP/THWAPS/B5 - Minor biases in humidity and saturation vapor pressuresgpthwapsB5.b1Does not affect quality
D050812.7SGP/THWAPS/B6 - Minor biases in humidity and saturation vapor pressuresgpthwapsB6.b1Does not affect quality
D050813.2SGP/THWAPS/B1 - Minor bias in saturation vapor pressuresgpthwapsB1.b1Does not affect quality
D050913.1SGP/THWAPS/B4 - RH values exceeding 105%sgpthwapsB4.b1Suspect
D051027.2SGP/THWAPS/B4 - Time uncertaintysgpthwapsB4.b1Suspect
D060307.2SGP/THWAPS/B6 - Wind Speed values near zerosgpthwapsB6.b1Incorrect
D060717.1SGP/THWAPS/B4 - Temp and RH data incorrectsgpthwapsB4.b1Incorrect
D060830.1SGP/THWAPS/B4 - Reprocessing Notice (RID 320)sgpthwapsB4.b1Does not affect quality
D070221.2SGP/THWAPS/B6 - Wind Speed Data Artificially LowsgpthwapsB6.b1Incorrect
D070221.3SGP/THWAPS/B5 - Wind Speed and Direction Data IncorrectsgpthwapsB5.b1Incorrect
D071010.2SGP/THWAPS/B5 - Reprocessing Notice (RID 444)sgpthwapsB5.b1Does not affect quality
D080116.19SGP/THWAPS/B1 - Wind Data Incorrect Due to IcingsgpthwapsB1.b1Incorrect
D080116.20SGP/THWAPS/B1 - T/RH Data IncorrectsgpthwapsB1.b1Incorrect
D080116.21SGP/THWAPS/B5 - Wind Data Incorrect Due to IcingsgpthwapsB5.b1Incorrect
D080116.22SGP/THWAPS/B6 - Wind Data Incorrect Due to IcingsgpthwapsB6.b1Incorrect
D080116.23SGP/THWAPS/B4 - Wind Data Incorrect Due to IcingsgpthwapsB4.b1Incorrect
D080116.24SGP/THWAPS/C1 - RH Data IncorrectsgpthwapsC1.b1Incorrect
D080326.1SGP/THWAPS/B4 - Temp and RH values incorrect during hours of no sunlightsgpthwapsB4.b1Suspect
D080806.1SGP/THWAPS/B6 - Wind Speed Values IncorrectsgpthwapsB6.b1Incorrect
D090114.5SGP/THWAPS/B4 - RH sensor failuresgpthwapsB4.b1Incorrect
D090211.2SGP/THWAPS/C1 - Barometer intermittentsgpthwapsC1.b1Suspect
D090306.1SGP/THWAPS/C1 - Time stamp of data record incorrectsgpthwapsC1.b1Incorrect
D090824.2SGP/THWAPS/C1 - Wind speed incorrectsgpthwapsC1.b1Incorrect


DQRID : D020313.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/09/2002034004/23/20021418Incorrect
Subject:
SGP/THWAPS/C1 - THWAPS C1 miscalibrated
DataStreams:sgpthwapsC1.b1
Description:
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.
Measurements:sgpthwapsC1.b1:
  • 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)


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DQRID : D030325.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/18/2003143003/18/20032205Incorrect
Subject:
SGP/THWAPS/B6 - Loss of temperature and RH for 8 hours
DataStreams:sgpthwapsB6.b1
Description:
The UPS for this system failed resulting in loss of power to the HMP233 unit.  As a 
result, the temperature and RH values were read as zero by the data logger.  SiteOps replaced 
the UPS and all appears well now.
Measurements:sgpthwapsB6.b1:
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • sd_pres
  • sd_vap_pres
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)


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DQRID : D030917.21
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/09/2002205503/11/20022005Missing
03/13/2002175503/14/20021505Missing
Subject:
SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems
DataStreams:sgpthwapsB5.b1, sgpthwapsB1.b1, sgpthwapsC1.b1, sgpthwapsB6.b1
Description:
Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.
Measurements:sgpthwapsC1.b1:
  • Altitude above mean sea level(alt)
  • Wind speed, surface, 1-min avg(wspd)
  • sd_wdir
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • sd_pres
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • East longitude(lon)
  • vbat
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • base_time
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • time_offset
  • sd_vap_pres
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • North latitude(lat)

sgpthwapsB6.b1:
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • vbat
  • sd_wdir
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • East longitude(lon)
  • Wind speed, surface, 1-min avg(wspd)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • time_offset
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • base_time
  • sd_pres
  • Altitude above mean sea level(alt)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • sd_vap_pres
  • North latitude(lat)

sgpthwapsB1.b1:
  • time_offset
  • Wind speed, surface, 1-min avg(wspd)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • East longitude(lon)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • sd_vap_pres
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • North latitude(lat)
  • sd_wdir
  • vbat
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Altitude above mean sea level(alt)
  • base_time
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • sd_pres

sgpthwapsB5.b1:
  • North latitude(lat)
  • East longitude(lon)
  • sd_pres
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • vbat
  • sd_vap_pres
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • sd_wdir
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • base_time
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • time_offset
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Wind speed, surface, 1-min avg(wspd)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • Altitude above mean sea level(alt)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)


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DQRID : D031205.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/04/2003160512/23/20031940Incorrect
Subject:
SGP/THWAPS/B5 - T/RH Sensor Failure
DataStreams:sgpthwapsB5.b1
Description:
The T/H sensor cable was chewed in half by a rodent.  Cable was
replaced and reasonable data resumed after the transmitter was
adjusted 12/23.
Measurements:sgpthwapsB5.b1:
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • sd_vap_pres


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DQRID : D031213.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/06/2003034512/22/20032217Suspect
Subject:
SGP/THWAPS/B6 - Battery Voltage Problem
DataStreams:sgpthwapsB6.b1
Description:
Power supply failed and was replaced.  Data were intermittently 
incorrect and very spiky.
Measurements:sgpthwapsB6.b1:
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • vbat
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • Wind speed, surface, 1-min avg(wspd)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • sd_wdir
  • base_time
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • sd_pres
  • sd_vap_pres


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DQRID : D041123.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/16/2004213511/29/20041930Incorrect
Subject:
SGP/THWAPS/C1 - RH Sensor Calibration
DataStreams:sgpthwapsC1.b1
Description:
The analog output for the T/RH probe was incorrectly calibrated.  This
caused excessively high readings of RH.
Measurements:sgpthwapsC1.b1:
  • 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)


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DQRID : D050205.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/03/2005231502/16/20051850Incorrect
Subject:
SGP/THWAPS/B5 - Temperature Sensor failure
DataStreams:sgpthwapsB5.b1
Description:
Temperature readings exceed 50 deg C.  Temperature sensor failed and was replaced.
Measurements:sgpthwapsB5.b1:
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • sd_vap_pres


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DQRID : D050209.14
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/03/2005000001/09/20052359Suspect
Subject:
SGP/THWAPS/B1 - Wind Data Suspect
DataStreams:sgpthwapsB1.b1
Description:
Wind speed and direction data suspect during time period due to icing.
Measurements:sgpthwapsB1.b1:
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)
  • Wind direction, at 10-m height, 30-min intervals(wdir)


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DQRID : D050209.15
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/04/2005000001/17/20052359Suspect
Subject:
SGP/THWAPS/B4 - Wind Data Suspect
DataStreams:sgpthwapsB4.b1
Description:
Wind speed and direction data suspect during time period due to icing.
Measurements:sgpthwapsB4.b1:
  • sd_wdir
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D050209.16
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/03/2005000002/03/20052359Suspect
Subject:
SGP/THWAPS/B5 - Wind Data Suspect
DataStreams:sgpthwapsB5.b1
Description:
Wind speed and direction data intermittently low throughout time period due to icing on 
sensor.
Measurements:sgpthwapsB5.b1:
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)
  • Wind direction, at 10-m height, 30-min intervals(wdir)


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DQRID : D050209.17
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/04/2005000002/04/20052359Suspect
Subject:
SGP/THWAPS/B6 - Wind Data Suspect
DataStreams:sgpthwapsB6.b1
Description:
Wind speed and direction data intermittently low throughout time period due to icing on 
sensor.
Measurements:sgpthwapsB6.b1:
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D050812.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000007/30/20051722Does not affect quality
Subject:
SGP/THWAPS/B4 - Minor biases in humidity and saturation vapor pressure
DataStreams:sgpthwapsB4.b1
Description:
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.

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).
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)


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DQRID : D050812.12
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000008/10/20051445Does not affect quality
Subject:
SGP/THWAPS/C1 - Minor bias in saturation vapor pressure
DataStreams:sgpthwapsC1.b1
Description:
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).
Measurements:sgpthwapsC1.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)


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DQRID : D050812.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000007/31/20051714Does not affect quality
Subject:
SGP/THWAPS/B5 - Minor biases in humidity and saturation vapor pressure
DataStreams:sgpthwapsB5.b1
Description:
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.
   
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).
Measurements:sgpthwapsB5.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)


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DQRID : D050812.7
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000007/30/20052355Does not affect quality
Subject:
SGP/THWAPS/B6  - Minor biases in humidity and saturation vapor pressure
DataStreams:sgpthwapsB6.b1
Description:
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.
   
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).
Measurements:sgpthwapsB6.b1:
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)


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DQRID : D050813.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/21/1999000008/01/20052034Does not affect quality
Subject:
SGP/THWAPS/B1 - Minor bias in saturation vapor pressure
DataStreams:sgpthwapsB1.b1
Description:
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).
Measurements:sgpthwapsB1.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)


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DQRID : D050913.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/06/2005000010/03/20051730Suspect
Subject:
SGP/THWAPS/B4 - RH values exceeding 105%
DataStreams:sgpthwapsB4.b1
Description:
RH measurements were reaching the max value of 105% on a consistent basis.  Spider web 
internal to the sensor housing was found and removed.
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)


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DQRID : D051027.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/20/2005180010/21/20051500Suspect
Subject:
SGP/THWAPS/B4 - Time uncertainty
DataStreams:sgpthwapsB4.b1
Description:
The clock on the site collection system was incorrect when it was deployed on 10/20.  The 
clock was corrected on 10/21 at approximately 15:02.  The data collected in the interim 
received grossly wrong time stamps.  These time stamps have been manually corrected, but 
there is some uncertainty in the time stamps still.

Data during the period specified should be considered to be within +/- 5 minutes of the 
timestamp indicated.
Measurements:sgpthwapsB4.b1:
  • time_offset
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • base_time
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D060307.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/12/2006215503/14/20062320Incorrect
Subject:
SGP/THWAPS/B6 - Wind Speed values near zero
DataStreams:sgpthwapsB6.b1
Description:
The wind sensor reported speeds near zero during period due to propeller falling off.  
Propeller was replaced.
Measurements:sgpthwapsB6.b1:
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D060717.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/05/2006180007/18/20061647Incorrect
Subject:
SGP/THWAPS/B4 - Temp and RH data incorrect
DataStreams:sgpthwapsB4.b1
Description:
After sensor replacement the temperature values are too low.  The range of the sensor was 
incorrectly set at -40 to 80 instead of -30 to 70.  RH values are also suspect.
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)


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DQRID : D060830.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/05/2006182509/26/20060000Does not affect quality
Subject:
SGP/THWAPS/B4 - Reprocessing Notice (RID 320)
DataStreams:sgpthwapsB4.b1
Description:
See below for details of reprocessing that was completed on 20140904.  Original DQR 
category: 3 (Yellow, Suspect).

-----------------------------------------------------------

After replacement of the THWAPS T/RH sensor the span was incorrectly set to 0-100 instead 
of 0-110.  This caused the RH values to be 9% higher than actual values.
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)


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DQRID : D070221.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/12/2007150001/17/20070910Incorrect
Subject:
SGP/THWAPS/B6 - Wind Speed Data Artificially Low
DataStreams:sgpthwapsB6.b1
Description:
The wind speed data is lower than surrounding sites during this time period.  Icing 
conditions were occurring leading to the lower wind speeds as the sensor was artificially 
slowed.
Measurements:sgpthwapsB6.b1:
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D070221.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/14/2007000001/18/20071010Incorrect
Subject:
SGP/THWAPS/B5 - Wind Speed and Direction Data Incorrect
DataStreams:sgpthwapsB5.b1
Description:
Wind speed and direction data were incorrect as the sensor was frozen.
Measurements:sgpthwapsB5.b1:
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)
  • Wind direction, at 10-m height, 30-min intervals(wdir)


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DQRID : D071010.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/17/2007192010/11/20071620Does not affect quality
Subject:
SGP/THWAPS/B5 - Reprocessing Notice (RID 444)
DataStreams:sgpthwapsB5.b1
Description:
See below for details of reprocessing that was completed on 20140904.  Original DQR 
category: 3 (Yellow, Suspect).

-----------------------------------------------------------

The T/RH probe was replaced with a recently calibrated sensor.  The newly installed probe 
did not have the correct span 0-110% RH for output.  This caused the readings to 
artificially high by 10%.
Measurements:sgpthwapsB5.b1:
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)


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DQRID : D080116.19
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/10/2007205012/11/20072213Incorrect
Subject:
SGP/THWAPS/B1 - Wind Data Incorrect Due to Icing
DataStreams:sgpthwapsB1.b1
Description:
An ice storm caused the wind data from the RM Young wind sensor to be
incorrect.  In many instances it was frozen and unmoving, at times it
measured values but those are extremely suspect.
Measurements:sgpthwapsB1.b1:
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)
  • Wind direction, at 10-m height, 30-min intervals(wdir)


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DQRID : D080116.20
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/16/2007230612/20/20071806Incorrect
Subject:
SGP/THWAPS/B1 - T/RH Data Incorrect
DataStreams:sgpthwapsB1.b1
Description:
The T/RH data was incorrect during the listed time period.  Reason unknown.  The sensor 
recovered on it's own.
Measurements:sgpthwapsB1.b1:
  • sd_vap_pres
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)


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DQRID : D080116.21
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/09/2007234012/11/20071150Incorrect
Subject:
SGP/THWAPS/B5 - Wind Data Incorrect Due to Icing
DataStreams:sgpthwapsB5.b1
Description:
An ice storm caused the wind data from the RM Young wind sensor to be
incorrect.  In many instances it was frozen and unmoving, at times it
measured values but those are extremely suspect.
Measurements:sgpthwapsB5.b1:
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)
  • Wind direction, at 10-m height, 30-min intervals(wdir)


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DQRID : D080116.22
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/10/2007103512/11/20071025Incorrect
Subject:
SGP/THWAPS/B6 - Wind Data Incorrect Due to Icing
DataStreams:sgpthwapsB6.b1
Description:
An ice storm caused the wind data from the RM Young wind sensor to be
incorrect.  In many instances it was frozen and unmoving, at times it
measured values but those are extremely suspect.
Measurements:sgpthwapsB6.b1:
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • sd_wdir
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D080116.23
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/10/2007211012/11/20071645Incorrect
Subject:
SGP/THWAPS/B4 - Wind Data Incorrect Due to Icing
DataStreams:sgpthwapsB4.b1
Description:
An ice storm caused the wind data from the RM Young wind sensor to be
incorrect.  In many instances it was frozen and unmoving, at times it
measured values but those are extremely suspect.
Measurements:sgpthwapsB4.b1:
  • sd_wdir
  • Wind direction, at 10-m height, 30-min intervals(wdir)
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D080116.24
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/22/2007175012/22/20072130Incorrect
Subject:
SGP/THWAPS/C1 - RH Data Incorrect
DataStreams:sgpthwapsC1.b1
Description:
The RH data was incorrect during the times listed.  Reason unknown.  The sensor recovered 
on its own.
Measurements:sgpthwapsC1.b1:
  • 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)


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DQRID : D080326.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/15/2008000011/05/20081745Suspect
Subject:
SGP/THWAPS/B4 - Temp and RH values incorrect during hours of no sunlight
DataStreams:sgpthwapsB4.b1
Description:
Unknown issues caused the temp and RH values to become lower during non-sunlight hours.  
The affects are best seen at sunrise and sunset when the data would adjust upward or 
downward abruptly.  Plots of the standard deviation show abrupt spikes at these times.  
Comparison plots to nearby mesonet sites suggest the nighttime values of both temp and RH are 
lower than nearby sites.  This problem was also very intermittent and was not occurring on 
a daily basis.  A complete move of the sensors and collection system to a separate 
building repaired the problem.
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • sd_pres
  • sd_vap_pres
  • Temperature, air, 60-m height, 30-min intervals(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)


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DQRID : D080806.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/31/2008203008/28/20081615Incorrect
Subject:
SGP/THWAPS/B6 - Wind Speed Values Incorrect
DataStreams:sgpthwapsB6.b1
Description:
The wind speed dropped to ~0 m/s (0.007 m/s) and maintained a flatline at this value.  The 
propeller retaining screw had loosened and the propeller fell off.  Propeller was 
replaced.
Measurements:sgpthwapsB6.b1:
  • Wind speed, surface, 1-min avg(wspd)


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DQRID : D090114.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/04/2009040002/04/20091815Incorrect
Subject:
SGP/THWAPS/B4 - RH sensor failure
DataStreams:sgpthwapsB4.b1
Description:
RH values dropped to ~20% below those recorded at nearby sites and occasionally flatlined 
at 0%.  RH sensor was replaced.
Measurements:sgpthwapsB4.b1:
  • Pressure, vapor, at 2-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Humidity, relative, on hybrid-b grid, derived from RUC model(rh)
  • Humidity, relative, at 2-m height, 30-min intervals, standard deviation(sd_rh)


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DQRID : D090211.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/09/2009000002/13/20092359Suspect
Subject:
SGP/THWAPS/C1 - Barometer intermittent
DataStreams:sgpthwapsC1.b1
Description:
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.
Measurements:sgpthwapsC1.b1:
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)


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DQRID : D090306.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/09/2008000001/23/20092359Incorrect
Subject:
SGP/THWAPS/C1 - Time stamp of data record incorrect
DataStreams:sgpthwapsC1.b1
Description:
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.
Measurements:sgpthwapsC1.b1:
  • time_offset
  • base_time


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DQRID : D090824.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/17/2009000011/27/20091745Incorrect
Subject:
SGP/THWAPS/C1 - Wind speed incorrect
DataStreams:sgpthwapsC1.b1
Description:
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.
Measurements:sgpthwapsC1.b1:
  • Wind speed, surface, 1-min avg(wspd)


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