Data Quality Reports for Session: 103112 User: nab_essc Completed: 12/08/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050811.6PYE/SONDE/M1 - Broken RH sensorpyesondewnpnM1.b1
D050902.2PYE/MWRP/M1 - Bias in Ground Relative Humidity MeasurementpyemwrpM1.00, pyemwrpM1.b1
D060630.43PYE/SKYRAD/M1 - Reprocess: Longwave Calibration errorpyeskyrad60sM1.b1
D060630.44PYE/GNDRAD/M1 - Reprocess: Longwave Calibration errorpyegndrad60sM1.b1


DQRID : D050811.6
Start DateStart TimeEnd DateEnd Time
08/02/2005112908/02/20051225
Subject:
PYE/SONDE/M1 - Broken RH sensor
DataStreams:pyesondewnpnM1.b1
Description:
One of the RH sensors on this radiosonde was bad.  The RH oscillates rapidly between near 
0 and ambient up to approximately 11 km.  The near-zero values are incorrect.
Measurements:pyesondewnpnM1.b1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)


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DQRID : D050902.2
Start DateStart TimeEnd DateEnd Time
06/17/2005000009/03/20050000
Subject:
PYE/MWRP/M1 - Bias in Ground Relative Humidity Measurement
DataStreams:pyemwrpM1.00, pyemwrpM1.b1
Description:
On June 17 2005, the MWRP was re-installed at PYE after the Super Blower was replaced by 
the old style dew blower. The relative humidity ground sensor in the dew blower is not as 
accurate. This resulted in a negative relative humidity bias of about 5.9 %. In other 
words the MWRP sensor was underestimating the relative humidity. The bias was determined by 
comparing MWRP measurements with SMET and radiosonde measurements. The MP.cfg file for 
the MWRP was changed to reflect this bias on 09/02/2005 and will take effect on 09/03/2005 
0000 GMT
Measurements:pyemwrpM1.b1:
  • Surface water vapor density at instrument(surfaceWaterVaporDensity)
  • Surface relative humidity at instrument(surfaceRelativeHumidity)

pyemwrpM1.00:
  • Raw data stream - documentation not supported(raw)


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DQRID : D060630.43
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/14/20050000
Subject:
PYE/SKYRAD/M1 - Reprocess: Longwave Calibration error
DataStreams:pyeskyrad60sM1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:pyeskyrad60sM1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)


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DQRID : D060630.44
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/14/20050000
Subject:
PYE/GNDRAD/M1 - Reprocess: Longwave Calibration error
DataStreams:pyegndrad60sM1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:pyegndrad60sM1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)


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