Data Quality Reports for Session: 133927 User: joycook Completed: 03/18/2011


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020313.1SGP/THWAPS/C1 - THWAPS C1 miscalibratedsgpthwapsC1.a1, sgpthwapsC1.b1
D030325.2SGP/THWAPS/B6 - Loss of temperature and RH for 8 hourssgpthwapsB6.a1, sgpthwapsB6.b1
D030917.21SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problemssgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1,
sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1,
sgpthwapsC1.b1
D031205.1SGP/THWAPS/B5 - T/RH Sensor FailuresgpthwapsB5.b1
D031213.1SGP/THWAPS/B6 - Battery Voltage ProblemsgpthwapsB6.b1
D041123.1SGP/THWAPS/C1 - RH Sensor CalibrationsgpthwapsC1.b1
D050205.5SGP/THWAPS/B5 - Temperature Sensor failuresgpthwapsB5.b1
D050209.14SGP/THWAPS/B1 - Wind Data SuspectsgpthwapsB1.b1
D050209.15SGP/THWAPS/B4 - Wind Data SuspectsgpthwapsB4.b1
D050209.16SGP/THWAPS/B5 - Wind Data SuspectsgpthwapsB5.b1
D050209.17SGP/THWAPS/B6 - Wind Data SuspectsgpthwapsB6.b1
D050812.1SGP/THWAPS/B4 - Minor biases in humidity and saturation vapor pressuresgpthwapsB4.b1
D050812.10SGP/THWAPS/C1 - Minor bias in humiditysgpthwapsC1.a1, sgpthwapsC1.b1
D050812.12SGP/THWAPS/C1 - Minor bias in saturation vapor pressuresgpthwapsC1.b1
D050812.4SGP/THWAPS/B5 - Minor biases in humidity and saturation vapor pressuresgpthwapsB5.b1
D050812.7SGP/THWAPS/B6 - Minor biases in humidity and saturation vapor pressuresgpthwapsB6.b1
D050813.1SGP/THWAPS/B1 - Minor bias in humiditysgpthwapsB1.a1, sgpthwapsB1.b1
D050813.2SGP/THWAPS/B1 - Minor bias in saturation vapor pressuresgpthwapsB1.b1
D050913.1SGP/THWAPS/B4 - RH values exceeding 105%sgpthwapsB4.b1
D051027.2SGP/THWAPS/B4 - Time uncertaintysgpthwapsB4.b1
D060307.2SGP/THWAPS/B6 - Wind Speed values near zerosgpthwapsB6.b1
D060717.1SGP/THWAPS/B4 - Temp and RH data incorrectsgpthwapsB4.b1
D060830.1SGP/THWAPS/B4 - Reprocess: RH% values 9% HighsgpthwapsB4.b1
D070221.2SGP/THWAPS/B6 - Wind Speed Data Artificially LowsgpthwapsB6.b1
D070221.3SGP/THWAPS/B5 - Wind Speed and Direction Data IncorrectsgpthwapsB5.b1
D071010.2SGP/THWAPS/B5 - Reprocess: RH values 10% Above ActualsgpthwapsB5.b1
D080116.19SGP/THWAPS/B1 - Wind Data Incorrect Due to IcingsgpthwapsB1.b1
D080116.20SGP/THWAPS/B1 - T/RH Data IncorrectsgpthwapsB1.b1
D080116.21SGP/THWAPS/B5 - Wind Data Incorrect Due to IcingsgpthwapsB5.b1
D080116.22SGP/THWAPS/B6 - Wind Data Incorrect Due to IcingsgpthwapsB6.b1
D080116.23SGP/THWAPS/B4 - Wind Data Incorrect Due to IcingsgpthwapsB4.b1
D080116.24SGP/THWAPS/C1 - RH Data IncorrectsgpthwapsC1.b1
D080326.1SGP/THWAPS/B4 - Temp and RH values incorrect during hours of no sunlightsgpthwapsB4.b1
D080806.1SGP/THWAPS/B6 - Wind Speed Values IncorrectsgpthwapsB6.b1
D090114.5SGP/THWAPS/B4 - RH sensor failuresgpthwapsB4.b1
D090211.2SGP/THWAPS/C1 - Barometer intermittentsgpthwapsC1.b1
D090306.1SGP/THWAPS/C1 - Time stamp of data record incorrectsgpthwapsC1.b1
D090824.2SGP/THWAPS/C1 - Wind speed incorrectsgpthwapsC1.b1
D991001.1SGP/THWAPS - Broken anemometer at B5 THWAPSsgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, DsgpthwapsB5.00, DsgpthwapsB5.a1,
DsgpthwapsB5.b1
D991008.1SGP/THWAPS - RH values low by factor of 1.1sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1, DsgpthwapsC1.a1, DsgpthwapsC1.b1
D991008.2SGP/THWAPS - RH low by factor of 1.1sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1


DQRID : D020313.1
Start DateStart TimeEnd DateEnd Time
03/09/2002034004/23/20021418
Subject:
SGP/THWAPS/C1 - THWAPS C1 miscalibrated
DataStreams:sgpthwapsC1.a1, 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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Temperature, air(temp)
  • Humidity, relative(rh)

sgpthwapsC1.a1:
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Temperature, air(temp)


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DQRID : D030325.2
Start DateStart TimeEnd DateEnd Time
03/18/2003143003/18/20032205
Subject:
SGP/THWAPS/B6 - Loss of temperature and RH for 8 hours
DataStreams:sgpthwapsB6.a1, 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.a1:
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Temperature, air(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)

sgpthwapsB6.b1:
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Temperature, air(temp)
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_pres
  • sd_vap_pres


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DQRID : D030917.21
Start DateStart TimeEnd DateEnd Time
03/09/2002205503/11/20022005
03/13/2002175503/14/20021505
Subject:
SGP/THWAPS/B1/B5/B6/C1 - Missing data due to Ice storm and clock problems
DataStreams:sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1, sgpthwapsB5.00, sgpthwapsB5.a1,
sgpthwapsB5.b1, sgpthwapsB6.00, sgpthwapsB6.a1, sgpthwapsB6.b1, sgpthwapsC1.00, sgpthwapsC1.a1,
sgpthwapsC1.b1
Description:
Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.
Measurements:sgpthwapsC1.b1:
  • alt
  • Mean Wind Speed(wspd)
  • lon
  • base_time
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Temperature, air(temp)
  • Unit Vector Wind Direction(wdir)
  • time_offset
  • sd_vap_pres
  • sd_wdir
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • sd_pres
  • Humidity, relative(rh)
  • vbat
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • lat

sgpthwapsB5.00:
  • Raw data stream - documentation not supported

sgpthwapsC1.a1:
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Temperature, air(temp)
  • sd_vap_pres
  • vbat
  • lon
  • alt
  • time_offset
  • Humidity, relative(rh)
  • base_time
  • sd_wdir
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_pres
  • Unit Vector Wind Direction(wdir)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • lat
  • Mean Wind Speed(wspd)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)

sgpthwapsB6.a1:
  • sd_wdir
  • sd_pres
  • Mean Wind Speed(wspd)
  • base_time
  • lon
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • vbat
  • Temperature, air(temp)
  • Unit Vector Wind Direction(wdir)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative(rh)
  • lat
  • time_offset
  • alt

sgpthwapsC1.00:
  • Raw data stream - documentation not supported

sgpthwapsB6.b1:
  • Humidity, relative(rh)
  • base_time
  • sd_pres
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • vbat
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • sd_wdir
  • Unit Vector Wind Direction(wdir)
  • lon
  • Mean Wind Speed(wspd)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Temperature, air(temp)
  • time_offset
  • alt
  • sd_vap_pres
  • lat

sgpthwapsB1.00:
  • Raw data stream - documentation not supported

sgpthwapsB1.b1:
  • Mean Wind Speed(wspd)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • sd_vap_pres
  • lat
  • Humidity, relative(rh)
  • Unit Vector Wind Direction(wdir)
  • Temperature, air(temp)
  • time_offset
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • lon
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_wdir
  • vbat
  • alt
  • base_time
  • sd_pres

sgpthwapsB1.a1:
  • sd_wdir
  • lat
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • base_time
  • Humidity, relative(rh)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • time_offset
  • Temperature, air(temp)
  • sd_pres
  • lon
  • vbat
  • sd_vap_pres
  • Unit Vector Wind Direction(wdir)
  • alt
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Mean Wind Speed(wspd)

sgpthwapsB6.00:
  • Raw data stream - documentation not supported

sgpthwapsB5.a1:
  • lon
  • Mean Wind Speed(wspd)
  • lat
  • Unit Vector Wind Direction(wdir)
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • base_time
  • sd_pres
  • vbat
  • time_offset
  • alt
  • sd_vap_pres
  • Temperature, air(temp)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_wdir
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)

sgpthwapsB5.b1:
  • lon
  • sd_pres
  • vbat
  • sd_vap_pres
  • Humidity, relative(rh)
  • Unit Vector Wind Direction(wdir)
  • time_offset
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • alt
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • lat
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Temperature, air(temp)
  • sd_wdir
  • base_time
  • Mean Wind Speed(wspd)


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DQRID : D031205.1
Start DateStart TimeEnd DateEnd Time
12/04/2003160512/23/20031940
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(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)
  • sd_vap_pres


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DQRID : D031213.1
Start DateStart TimeEnd DateEnd Time
12/06/2003034512/22/20032217
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:
  • vbat
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Unit Vector Wind Direction(wdir)
  • Mean Wind Speed(wspd)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Temperature, air(temp)
  • Humidity, relative(rh)
  • sd_wdir
  • base_time
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_pres
  • sd_vap_pres


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DQRID : D041123.1
Start DateStart TimeEnd DateEnd Time
11/16/2004213511/29/20041930
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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_vap_pres
  • Humidity, relative(rh)


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DQRID : D050205.5
Start DateStart TimeEnd DateEnd Time
02/03/2005231502/16/20051850
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(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres


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DQRID : D050209.14
Start DateStart TimeEnd DateEnd Time
01/03/2005000001/09/20052359
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
  • Mean Wind Speed(wspd)
  • Unit Vector Wind Direction(wdir)


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DQRID : D050209.15
Start DateStart TimeEnd DateEnd Time
01/04/2005000001/17/20052359
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
  • Unit Vector Wind Direction(wdir)
  • Mean Wind Speed(wspd)


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DQRID : D050209.16
Start DateStart TimeEnd DateEnd Time
02/03/2005000002/03/20052359
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
  • Mean Wind Speed(wspd)
  • Unit Vector Wind Direction(wdir)


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DQRID : D050209.17
Start DateStart TimeEnd DateEnd Time
02/04/2005000002/04/20052359
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:
  • Unit Vector Wind Direction(wdir)
  • sd_wdir
  • Mean Wind Speed(wspd)


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DQRID : D050812.1
Start DateStart TimeEnd DateEnd Time
09/21/1999000007/30/20051722
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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative(rh)


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DQRID : D050812.10
Start DateStart TimeEnd DateEnd Time
09/21/1999000012/07/19991100
Subject:
SGP/THWAPS/C1 - Minor bias in humidity
DataStreams:sgpthwapsC1.a1, sgpthwapsC1.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.
Measurements:sgpthwapsC1.b1:
  • Humidity, relative(rh)

sgpthwapsC1.a1:
  • Humidity, relative(rh)


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DQRID : D050812.12
Start DateStart TimeEnd DateEnd Time
09/21/1999000008/10/20051445
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, 60-m height, 30-min intervals(vap_pres)


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DQRID : D050812.4
Start DateStart TimeEnd DateEnd Time
09/21/1999000007/31/20051714
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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative(rh)


Back To Table of Contents

DQRID : D050812.7
Start DateStart TimeEnd DateEnd Time
09/21/1999000007/30/20052355
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(rh)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)


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DQRID : D050813.1
Start DateStart TimeEnd DateEnd Time
09/21/1999000012/07/19991800
Subject:
SGP/THWAPS/B1 - Minor bias in humidity
DataStreams:sgpthwapsB1.a1, sgpthwapsB1.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.
Measurements:sgpthwapsB1.b1:
  • Humidity, relative(rh)

sgpthwapsB1.a1:
  • Humidity, relative(rh)


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DQRID : D050813.2
Start DateStart TimeEnd DateEnd Time
09/21/1999000008/01/20052034
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, 60-m height, 30-min intervals(vap_pres)


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DQRID : D050913.1
Start DateStart TimeEnd DateEnd Time
08/06/2005000010/03/20051730
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, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)


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DQRID : D051027.2
Start DateStart TimeEnd DateEnd Time
10/20/2005180010/21/20051500
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, 60-m height, 30-min intervals(vap_pres)
  • Temperature, air(temp)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • Unit Vector Wind Direction(wdir)
  • Humidity, relative(rh)
  • base_time
  • Mean Wind Speed(wspd)


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DQRID : D060307.2
Start DateStart TimeEnd DateEnd Time
02/12/2006215503/14/20062320
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:
  • Mean Wind Speed(wspd)


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DQRID : D060717.1
Start DateStart TimeEnd DateEnd Time
07/05/2006180007/18/20061647
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, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Temperature, air(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)


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DQRID : D060830.1
Start DateStart TimeEnd DateEnd Time
07/05/2006182509/26/20060000
Subject:
SGP/THWAPS/B4 - Reprocess: RH% values 9% High
DataStreams:sgpthwapsB4.b1
Description:
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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative(rh)


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DQRID : D070221.2
Start DateStart TimeEnd DateEnd Time
01/12/2007150001/17/20070910
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:
  • Mean Wind Speed(wspd)


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DQRID : D070221.3
Start DateStart TimeEnd DateEnd Time
01/14/2007000001/18/20071010
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
  • Mean Wind Speed(wspd)
  • Unit Vector Wind Direction(wdir)


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DQRID : D071010.2
Start DateStart TimeEnd DateEnd Time
09/17/2007192010/11/20071620
Subject:
SGP/THWAPS/B5 - Reprocess: RH values 10% Above Actual
DataStreams:sgpthwapsB5.b1
Description:
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, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)


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DQRID : D080116.19
Start DateStart TimeEnd DateEnd Time
12/10/2007205012/11/20072213
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
  • Mean Wind Speed(wspd)
  • Unit Vector Wind Direction(wdir)


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DQRID : D080116.20
Start DateStart TimeEnd DateEnd Time
12/16/2007230612/20/20071806
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, 30-min intervals, standard deviation(sd_rh)
  • Temperature, air(temp)
  • Humidity, relative(rh)
  • Pressure, vapor, 60-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
12/09/2007234012/11/20071150
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
  • Mean Wind Speed(wspd)
  • Unit Vector Wind Direction(wdir)


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DQRID : D080116.22
Start DateStart TimeEnd DateEnd Time
12/10/2007103512/11/20071025
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:
  • Unit Vector Wind Direction(wdir)
  • sd_wdir
  • Mean Wind Speed(wspd)


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DQRID : D080116.23
Start DateStart TimeEnd DateEnd Time
12/10/2007211012/11/20071645
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
  • Unit Vector Wind Direction(wdir)
  • Mean Wind Speed(wspd)


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DQRID : D080116.24
Start DateStart TimeEnd DateEnd Time
12/22/2007175012/22/20072130
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, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_vap_pres
  • Humidity, relative(rh)


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DQRID : D080326.1
Start DateStart TimeEnd DateEnd Time
03/15/2008000011/05/20081745
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, 60-m height, 30-min intervals(vap_pres)
  • sd_pres
  • sd_vap_pres
  • Temperature, air(temp)
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)


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DQRID : D080806.1
Start DateStart TimeEnd DateEnd Time
07/31/2008203008/28/20081615
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:
  • Mean Wind Speed(wspd)


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DQRID : D090114.5
Start DateStart TimeEnd DateEnd Time
01/04/2009040002/04/20091815
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, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)


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DQRID : D090211.2
Start DateStart TimeEnd DateEnd Time
01/09/2009000002/13/20092359
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
12/09/2008000001/23/20092359
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
07/17/2009000011/27/20091745
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:
  • Mean Wind Speed(wspd)


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DQRID : D991001.1
Start DateStart TimeEnd DateEnd Time
09/08/1999023509/30/19991620
Subject:
SGP/THWAPS - Broken anemometer at B5 THWAPS
DataStreams:sgpthwapsB5.00, sgpthwapsB5.a1, sgpthwapsB5.b1, DsgpthwapsB5.00, DsgpthwapsB5.a1,
DsgpthwapsB5.b1
Description:
The R. M. Young anemometer lost a propellor vane and stopped.  This
problem was noted by Site Ops and repaired.  The wind velocity data during
the time the anemometer was broken were recorded as 0.007 m/s.
Measurements:sgpthwapsB5.00:
  • Raw data stream - documentation not supported

DsgpthwapsB5.00:
  • Development raw data stream - documentation not supported

DsgpthwapsB5.b1:
  • Development data stream - documentation not supported

sgpthwapsB5.a1:
  • lon
  • sd_pres
  • Mean Wind Speed(wspd)
  • lat
  • vbat
  • time_offset
  • Temperature, air(temp)
  • Unit Vector Wind Direction(wdir)
  • alt
  • Humidity, relative(rh)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • base_time
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_wdir
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)
  • sd_vap_pres

DsgpthwapsB5.a1:
  • Development data stream - documentation not supported

sgpthwapsB5.b1:
  • lat
  • lon
  • sd_pres
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Mean Wind Speed(wspd)
  • vbat
  • sd_vap_pres
  • Temperature, air(temp)
  • sd_wdir
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)
  • base_time
  • Unit Vector Wind Direction(wdir)
  • time_offset
  • Temperature, air, 30-min intervals, standard deviation(sd_temp)
  • alt
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)


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DQRID : D991008.1
Start DateStart TimeEnd DateEnd Time
09/27/1999144510/14/19992230
Subject:
SGP/THWAPS - RH values low by factor of 1.1
DataStreams:sgpthwapsC1.00, sgpthwapsC1.a1, sgpthwapsC1.b1, DsgpthwapsC1.a1, DsgpthwapsC1.b1
Description:
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.
Measurements:sgpthwapsC1.b1:
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • sd_vap_pres
  • Humidity, relative(rh)

sgpthwapsC1.a1:
  • sd_vap_pres
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)

sgpthwapsC1.00:
  • Raw data stream - documentation not supported

DsgpthwapsC1.a1:
  • Development data stream - documentation not supported

DsgpthwapsC1.b1:
  • Development data stream - documentation not supported


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DQRID : D991008.2
Start DateStart TimeEnd DateEnd Time
09/28/1999134510/14/19991440
Subject:
SGP/THWAPS - RH low by factor of 1.1
DataStreams:sgpthwapsB1.00, sgpthwapsB1.a1, sgpthwapsB1.b1
Description:
Because of instrument mentor stupidity, all B1 TWHAPS RH values collected
since the specified being date are low by a factor of 1.1.  This problem
also will affect the vapor pressure values in the file, but the scaling
will not be linear.  See companion DQR for THWAPS C1 for more detail.
Measurements:sgpthwapsB1.00:
  • Raw data stream - documentation not supported

sgpthwapsB1.b1:
  • sd_vap_pres
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Humidity, relative(rh)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)

sgpthwapsB1.a1:
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • Pressure, vapor, 60-m height, 30-min intervals(vap_pres)
  • sd_vap_pres
  • Humidity, relative(rh)


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