DQRID : D111005.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/01/2010000006/02/20101800Incorrect
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Subject:
GRW/AOS/M1 - CCN signal decline
DataStreams:grwaosccnM1.a1
Description:
There was a slow decline in the CCN signal from January to June of 2010 at GRW. The reason 
for this decline is unknown as all the instrument operating parameters appear normal. 
The decline was likely from a change in the CCN column thermal properties or a clogging of 
the detector inlet.
Suggestions: 
Best not to use the data.
Measurements:grwaosccnM1.a1:
  • CCN_T_nafion
  • CCN_T_sample
  • CCN_ProportionalValveVoltage
  • CCN_FirstStageMonitorVoltage
  • CCN_Temperature_Gradient
  • CCN_Q_sheath
  • CCN_T_TEC1
  • CCN_T_TEC2
  • CCN_laser_current
  • CCN_temp_unstable_flag
  • CCN_UpperSizeLimit
  • CCN_T_TEC3
  • CCN_T_OPC
  • CCN_T_inlet
  • CCN_ss_calc
  • N_CCN
  • CCN_dT_TEC3_TEC1_StdDev
  • CCN_P_sample
  • CCN_Q_sample
  • CCN_ss_set
  • N_CCN_bin_number
  • N_CCN_dN
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