Data Quality Reports for Session: 101509 User: c_long Completed: 09/11/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040421.3NSA/SKYRAD/C1 - itermittant IRT biasnsaskyrad60sC1.b1
D060406.2NSA/METTWR/C2 - CMH Intake Fan Failurensamettwr2hC2.b1
D060426.2NSA/METTWR/C2 - CMH Data Suspectnsamettwr2hC2.b1
D060426.4NSA/METTWR/C2 - CMH Data Suspectnsamettwr2hC2.b1
D060426.6NSA/METTWR/C1 - CMH Data Suspectnsamettwr4hC1.b1
D060526.3NSA/METTWR/C1 - Wind direction measurements suspectnsamettwr4hC1.b1
D060724.1NSA/SKYRAD/C2 - Summer solstice shading of radiometersnsaskyrad60sC2.b1
D060724.2NSA/SKYRAD/C1 - Summer solstice shading of radiometersnsaskyrad60sC1.b1
D060817.4NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPansamettwr4hC1.b1
D060818.1NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPansamettwr2hC2.b1


DQRID : D040421.3
Start DateStart TimeEnd DateEnd Time
03/28/2003020006/21/20060215
Subject:
NSA/SKYRAD/C1 - itermittant IRT bias
DataStreams:nsaskyrad60sC1.b1
Description:
A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky 
temperature measurement then a sudden correction, as compared to AERI, appears to have been 
caused by a combination of a failing IR detector, a poor signal cable, a contaminated 
(with condensation or frost) mirror or lens, and low ambient temperatures. The positive 
bias was apparently not consistant in either frequency or duration but on days when the 
unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. 

The instrument was repaired and recalibrated and the signal cable replaced.
Measurements:nsaskyrad60sC1.b1:
  • Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
  • Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)

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DQRID : D060406.2
Start DateStart TimeEnd DateEnd Time
04/04/2006191404/06/20062025
Subject:
NSA/METTWR/C2 - CMH Intake Fan Failure
DataStreams:nsamettwr2hC2.b1
Description:
Intake fan failing causing poor readings from the CMH.
Measurements:nsamettwr2hC2.b1:
  • Chilled Mirror Temperature(CMHTemp)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Dew Point(CMHDP)

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DQRID : D060426.2
Start DateStart TimeEnd DateEnd Time
04/06/2006221204/11/20061812
Subject:
NSA/METTWR/C2 - CMH Data Suspect
DataStreams:nsamettwr2hC2.b1
Description:
CMH data was suspect due to incorrect intake fan installed.  Proper spares were not on 
hand.
Measurements:nsamettwr2hC2.b1:
  • Chilled Mirror Temperature(CMHTemp)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Dew Point(CMHDP)

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DQRID : D060426.4
Start DateStart TimeEnd DateEnd Time
04/20/2006153504/20/20062110
Subject:
NSA/METTWR/C2 - CMH Data Suspect
DataStreams:nsamettwr2hC2.b1
Description:
CMH data was suspect due to blockage of intake by snow.
Measurements:nsamettwr2hC2.b1:
  • Chilled Mirror Temperature(CMHTemp)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Dew Point(CMHDP)

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DQRID : D060426.6
Start DateStart TimeEnd DateEnd Time
03/25/2006003704/11/20061811
Subject:
NSA/METTWR/C1 - CMH Data Suspect
DataStreams:nsamettwr4hC1.b1
Description:
CMH data was suspect due to incorrect calibration caused by procedural errors.  The 
procedures were corrected and a new calibration completed.
Measurements:nsamettwr4hC1.b1:
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Dew Point(CMHDP)
  • Chilled Mirror Temperature(CMHTemp)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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DQRID : D060526.3
Start DateStart TimeEnd DateEnd Time
05/25/2006030006/01/20060000
Subject:
NSA/METTWR/C1 - Wind direction measurements suspect
DataStreams:nsamettwr4hC1.b1
Description:
20m wind direction standard deviation was 0 degrees for extended periods of time.  This 
suggests the wind vane was icing up.
Measurements:nsamettwr4hC1.b1:
  • 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
  • Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)

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DQRID : D060724.1
Start DateStart TimeEnd DateEnd Time
05/08/2000000008/05/20000000
05/08/2001000008/05/20010000
05/08/2002000008/05/20020000
05/08/2003000008/05/20030000
05/08/2004000008/05/20040000
05/08/2005000008/05/20050000
05/08/2006000008/05/20060000
Subject:
NSA/SKYRAD/C2 - Summer solstice shading of radiometers
DataStreams:nsaskyrad60sC2.b1
Description:
On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP 
(global hemispheic shortwave measurement) radiometers are shaded by other instruments or 
support structures. Shading azimuths have been determined for this site.  The radiometer 
mentor suggests not using the data from the NIP and PSP radiometers when the sun is within 
the following azimuth bounds (typically from May 8th to August 5th of each year):
Instr   Obstruction   AzStart   AzEnd
NIP     rad table     356       17
PSP     mfrsr         341       353

Note: There are a number of objects near the NW,N and NE horizon that may affect sunrise 
data near the summer soltice.
Measurements:nsaskyrad60sC2.b1:
  • PSP1 unshaded standard deviation(psp1_sd)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • PSP shaded standard deviation(psps_sd)
  • PSP shaded mean(psps_mean)
  • NIP maximum(nip_max)
  • NIP mean(nip_mean)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • PSP1 unshaded maximum(psp1_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • NIP minimum(nip_min)
  • NIP standard deviation(nip_sd)
  • PSP1 unshaded minimum(psp1_min)
  • PSP shaded minimum(psps_min)
  • PSP1 unshaded mean(psp1_mean)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • PSP shaded maximum(psps_max)

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DQRID : D060724.2
Start DateStart TimeEnd DateEnd Time
05/08/1999000008/05/19990000
05/08/2000000008/05/20000000
05/08/2001000008/05/20010000
05/08/2002000008/05/20020000
05/08/2003000008/05/20030000
05/08/2004000008/05/20040000
05/08/2005000008/05/20050000
05/08/2006000008/05/20060000
Subject:
NSA/SKYRAD/C1 - Summer solstice shading of radiometers
DataStreams:nsaskyrad60sC1.b1
Description:
On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP 
(global hemispheic shortwave measurement) radiometers are shaded by other instruments or 
support structures.  Shading azimuths have been determined for this site.  The radiometer 
mentor suggests not using the data from the NIP and PSP radiometers when the sun is 
within the following azimuth bounds (typically from May 8th to August 5th of each year):
Instrmt Obstruction     AzStart     AzEnd     
NIP     rad table       346         358
NIP     met tower       13          15
PSP     mfrsr           6           16
Measurements:nsaskyrad60sC1.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • NIP maximum(nip_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • NIP standard deviation(nip_sd)
  • NIP minimum(nip_min)
  • PSP1 unshaded minimum(psp1_min)
  • PSP shaded maximum(psps_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • NIP mean(nip_mean)
  • PSP shaded minimum(psps_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • PSP shaded mean(psps_mean)
  • PSP1 unshaded maximum(psp1_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP shaded standard deviation(psps_sd)
  • PSP1 unshaded mean(psp1_mean)

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DQRID : D060817.4
Start DateStart TimeEnd DateEnd Time
10/31/2003000007/12/20061608
Subject:
NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa
DataStreams:nsamettwr4hC1.b1
Description:
Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.
Measurements:nsamettwr4hC1.b1:
  • Atmospheric Pressure(AtmPress)

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DQRID : D060818.1
Start DateStart TimeEnd DateEnd Time
11/06/2003000007/12/20061853
Subject:
NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPa
DataStreams:nsamettwr2hC2.b1
Description:
Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.
Measurements:nsamettwr2hC2.b1:
  • Atmospheric Pressure(AtmPress)

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