Data Quality Reports for Session: 143374 User: qian1chen Completed: 06/27/2012

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D110616.1SGP/AOS/C1 - Invalid flagsgpaosccn100C1.a1
D120608.1SGP/AOS/C1 - CPC leaksgpaosC1.a0, sgpaoscpcC1.a1, sgpnoaaaosC1.b0, sgpnoaaaosC1.b1, sgpnoaaaosavgC1.b0,
sgpnoaaaosavgC1.b1


DQRID : D110616.1
Start DateStart TimeEnd DateEnd Time
05/21/2009000006/16/20110000
Subject:
SGP/AOS/C1 - Invalid flag
DataStreams:sgpaosccn100C1.a1
Description:
The temperature unstable flag or CCN_temp_unstable_flag(time) seems to be set to 1 even 
when the temperature is stable. This started after the instrument software was upgraded. To 
check for temperature stability use instead the CCN_dT_TEC3_TEC1_StdDev(time) variable 
which gives the standard deviation of the 1 second temperature differential between T3 and 
T1. When this variable is at or below 0.05 C then the temperature can be considered stable.
Measurements:sgpaosccn100C1.a1:
  • CCN_temp_unstable_flag

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DQRID : D120608.1
Start DateStart TimeEnd DateEnd Time
12/08/2010154004/18/20112010
Subject:
SGP/AOS/C1 - CPC leak
DataStreams:sgpaosC1.a0, sgpaoscpcC1.a1, sgpnoaaaosC1.b0, sgpnoaaaosC1.b1, sgpnoaaaosavgC1.b0,
sgpnoaaaosavgC1.b1
Description:
There was a slow internal leak in the CPC instrument and the data slowly decreased over 
time. The CN concentration is a lower limit and is likely 5 to 20% lower than the actual 
value with higher errors toward the end of the DQR period. The problem was fixed by 
replacing the CPC saturator block.
Measurements:sgpnoaaaosavgC1.b1:
  • N_CPC_1_std
  • N_CPC_1_N
  • N_OPC_1_N
sgpaosC1.a0:
  • Particle concentration from Condensation Particle Counter(CPCPartConc)
sgpnoaaaosavgC1.b0:
  • N_CPC_1_N
  • N_CPC_1_std
  • Condensation Nuclei Concentration Number(N_CPC_1)
sgpnoaaaosC1.b0:
  • Condensation Nuclei Concentration Number(N_CPC_1)
sgpaoscpcC1.a1:
  • nozzle_pressure
  • orifice_pressure
sgpnoaaaosC1.b1:
  • Condensation Nuclei Concentration Number(N_CPC_1)

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