Data Quality Reports for Session: 137131 User: vghate Completed: 08/30/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020313.1SGP/THWAPS/C1 - THWAPS C1 miscalibratedsgpthwapsC1.a1, sgpthwapsC1.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
D041123.1SGP/THWAPS/C1 - RH Sensor CalibrationsgpthwapsC1.b1
D050812.12SGP/THWAPS/C1 - Minor bias in saturation vapor pressuresgpthwapsC1.b1
D080116.24SGP/THWAPS/C1 - RH Data IncorrectsgpthwapsC1.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


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 : 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 : 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 : 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 : 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 : 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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