Data Quality Reports for Session: 107787 User: chela Completed: 09/16/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060724.1NSA/SKYRAD/C2 - Summer solstice shading of radiometersnsaskyrad60sC2.b1


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, Pyrgeometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • PSP shaded standard deviation(psps_sd)
  • PSP shaded mean(psps_mean)
  • NIP maximum(nip_max)
  • NIP mean(nip_mean)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
  • PSP1 unshaded maximum(psp1_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, 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 Pyranometer, Maxima(down_short_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
  • PSP shaded maximum(psps_max)


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