DQRID : D120522.10
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/14/2008020008/18/20080545Suspect
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Subject:
TWP/QCRAD/C1 - LWdn ventilator failed
DataStreams:twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.c1, twpqcrad1longC1.s2
Description:
LWdn flux may be questionable during this time. Described in instrument DQR D080826.3:

During the time range specified the PIR2 output is questionable due to ventilator fan 
failure.
Although the PIR is temperature compensated, data review indicates that the PIR2 didn't
compare as well with PIR1. Typical differences during full sun are approximately 10 w/m2.
During this time period differences of 10-14 W/m2 were noted.
Suggestions: 
Use caution with LWdn during this time.
Measurements:twpqcrad1longC1.c1:
  • down_long_hemisp
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twpqcrad1longC1.s1:
  • down_long_hemisp
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twpqcrad1longC1.c2:
  • down_long_hemisp
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twpqcrad1longC1.s2:
  • down_long_hemisp
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