Data Quality Reports for Session: 113002 User: liuming Completed: 07/08/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080211.2TWP/SKYRAD/C1 - Failed PSP ventilator fantwpskyrad20sC1.a0, twpskyrad60sC1.b1


DQRID : D080211.2
Start DateStart TimeEnd DateEnd Time
01/31/2008000002/08/20080248
Subject:
TWP/SKYRAD/C1 - Failed PSP ventilator fan
DataStreams:twpskyrad20sC1.a0, twpskyrad60sC1.b1
Description:
On 1/31 the ventilator for the PSP measuring downwelling_shortwave_hemispheric irradiance 
failed.  The DQ effect of this failure on the measurement of down_short_hemisp is not 
possible to fully quantify but it has been noted that during these failures the PSP 
nighttime values can be several (1-3W/m2) smaller than usual.  Another effect is slower thermal 
response (1hr) of the PSP instrument due to daytime heating and cooling of the ventilator 
housing.
Measurements:twpskyrad20sC1.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
twpskyrad60sC1.b1:
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)

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