DQRID : D031226.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/20/2001000001/23/20020000Suspect
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Subject:
NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too large
DataStreams:nsaskyrad60sC1.b1, nsaskyradC1.00, nsaskyrad60sC1.a1
Description:
This problem only became apparent as NSA C1 nights became long enough for full darkness. 
The shaded global diffuse instrument (Eppley 8-48) showed a negative nighttime offset 
larger than the expected 0 to -4 W/m2. Typically -5 to -8 W/m2. This size of offset is not 
uncommon with Eppley PSPs but not observed with Eppley 8-48s.  The problem was corrected 
with replacement of mounting screws which were creating a ground loop.
Suggestions: 
Data to be used at users discretion.
Measurements:nsaskyradC1.00:
  • Raw data stream - documentation not supported
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nsaskyrad60sC1.a1:
  • down_short_diffuse_hemisp_min
  • down_short_diffuse_hemisp_std
  • psps_mean
  • down_short_diffuse_hemisp_max
  • down_short_diffuse_hemisp
  • psps_min
  • psps_sd
  • psps_max
more
nsaskyrad60sC1.b1:
  • down_short_diffuse_hemisp_std
  • down_short_diffuse_hemisp_max
  • psps_mean
  • down_short_diffuse_hemisp
  • down_short_diffuse_hemisp_min
  • psps_min
  • psps_sd
  • psps_max
more

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