Data Quality Reports for Session: 154764 User: biny1 Completed: 11/24/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D090211.6HFE/AOS/M1 - CCN missinghfeaosccnM1.a1
D111122.2HFE/AOS/M1 - CPC and CCN data questionablehfeaosccnM1.a1, hfenoaaaosM1.b1


DQRID : D090211.6
Start DateStart TimeEnd DateEnd Time
07/08/2008032007/25/20080429
Subject:
HFE/AOS/M1 - CCN missing
DataStreams:hfeaosccnM1.a1
Description:
A power regulator on the CCN circuit board failed. The mentor replaced it and it was up 
and working on 7/25/2008.
Measurements:hfeaosccnM1.a1:
  • CCN_laser_current
  • AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
  • CCN_FirstStageMonitorVoltage
  • CCN_ss_calc
  • CCN_T_sample
  • CCN_T_TEC1
  • CCN_T_TEC3
  • CCN_T_TEC2
  • CCN_Q_sheath
  • CCN_T_nafion
  • Cloud condensation nuclei number density(N_CCN)
  • CCN_P_sample
  • CCN_dT_TEC3_TEC1_StdDev
  • CCN_T_inlet
  • Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
  • CCN_ProportionalValveVoltage
  • CCN_temp_unstable_flag
  • CCN_Q_sample
  • CCN_Temperature_Gradient
  • AOS CCN number concentration by bin(N_CCN_dN)
  • CCN_T_OPC
  • CCN_ss_set

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DQRID : D111122.2
Start DateStart TimeEnd DateEnd Time
07/25/2008000012/28/20082300
Subject:
HFE/AOS/M1 - CPC and CCN data questionable
DataStreams:hfeaosccnM1.a1, hfenoaaaosM1.b1
Description:
The CPC slowly clogged and the signal declined until the instrument was cleaned at which 
point the signal would increase. The data is still a good relative measure of the daily 
changes in the CN concentration, but the absolute value may be too low.

The mentor was unable to monitor the flow rate and operation in the CCN during operation. 
The relative changes in CCN with %ss are likely fine, but the absolute values may be too 
low or too high. Dust was prevalent at the site and likely contributed to the CCN signal 
such that large dust particles appeared as droplets.
Measurements:hfenoaaaosM1.b1:
  • Cloud condensation nuclei number density(N_CCN)
  • Condensation Nuclei Concentration Number(N_CPC_1)
hfeaosccnM1.a1:
  • CCN_Q_sheath
  • Cloud condensation nuclei number density(N_CCN)
  • CCN_Q_sample
  • AOS CCN number concentration by bin(N_CCN_dN)

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