DQRID : D040208.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/15/2004230905/27/20041500Suspect
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Subject:
NSA/GNDRAD/C2 - Upwelling PIR measurement - spikes in thermopile signal
DataStreams:nsagndradC2.00, nsagndrad20sC2.a1, nsagndrad60sC2.b1
Description:
ULH measurements have many spikes at this site.  On 2/03, the anomalous spikes become 
frequent and are very noticeable from 0027 - 0445 UTC.  Negative and positive spikes occur on 
seemingly random days until 5/27/2004.  Extensive troublshooting could not resolve 
problem, including a datalogger changout on 4/22.  Problem seems to have resolved itself with 
the last spikes occuring on 5/27/2004 approximately 1500GMT.  No problems with upwelling 
PIR noise are evident up until and after the conversion from Zeno to Campbell dataloggers 
on 11/22/2004.
Suggestions: 
review upwelling PIR (ULH) data before using.
Measurements:nsagndrad60sC2.b1:
  • up_long_hemisp_min
  • up_long_hemisp
  • pir1_min
  • up_long_hemisp_max
  • up_long_hemisp_std
  • pir1_sd
  • pir1_max
  • pir1_mean
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nsagndrad20sC2.a1:
  • pir1_voltage
  • inst_up_long_hemisp_tp
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nsagndradC2.00:
  • Raw data stream - documentation not supported
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