DQRID : D170303.16
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/28/2016000003/03/20170308Suspect
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Subject:
SGP/CCN/C1 - Lowest size bin counting high
DataStreams:sgpaosccn100C1.a1, sgpaosccnC1.00, sgpaosccn1colC1.b1, sgpaosccnC1.a1
Description:
The lowest size bin of the CCN was counting high, indicating a problem with the OPC. We 
believe this only affected the smallest bin counts, but the other counts are OK. This 
problem resulted in CCN counts>CN counts meaning CCN counts were too high.
Suggestions: 
The processed data files don't include the smallest size bin CCN counts when 

calculating certain parameters so the processed files (avgerage and spectra) should be ok. If 
you are using unprocessed files then you should treat the total CCN counts as questionable 
and calculate total CCN counts without including the smallest size bin.
Measurements:sgpaosccnC1.a1:
  • N_CCN
  • N_CCN_dN
  • N_CCN_bin_number
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sgpaosccnC1.00:
  • Raw data stream - documentation not supported
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sgpaosccn1colC1.b1:
  • N_CCN_bin_number
  • N_CCN
  • N_CCN_dN
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sgpaosccn100C1.a1:
  • N_CCN_dN
  • N_CCN_bin_number
  • N_CCN
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