Data Quality Reports for Session: 140772 User: yanhrong04 Completed: 02/23/2012

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
D050812.10SGP/THWAPS/C1 - Minor bias in humiditysgpthwapsC1.a1, sgpthwapsC1.b1
D050812.12SGP/THWAPS/C1 - Minor bias in saturation vapor pressuresgpthwapsC1.b1
D991008.1SGP/THWAPS - RH values low by factor of 1.1sgpthwapsC1.a1, sgpthwapsC1.b1, sgpthwapsC1.00, DsgpthwapsC1.a1, DsgpthwapsC1.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
  • Humidity, relative, 30-min intervals, standard deviation(sd_rh)
  • base_time
  • 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_pres
  • sd_wdir
  • 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 : D050812.10
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 : 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.a1, sgpthwapsC1.b1, sgpthwapsC1.00, 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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