Data Quality Reports for Session: 178754 User: manasi1mah Completed: 08/02/2016


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D141210.3PVC/CCN/S1 - Problem with time fieldspvcaosccn200S1.a1Suspect


DQRID : D141210.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/24/2013190002/08/20132300Suspect
06/24/2012200008/04/20122000Suspect
Subject:
PVC/CCN/S1 - Problem with time fields
DataStreams:pvcaosccn200S1.a1
Description:
The CCN instrument time during the PVC deployment was not synched with a time server.  I 
analyzed the data to determine how the CCN time was off by comparing spikes in the CCN 
data to the CPC and PSAP data.  A  document  with a list of peaks 
that were used to determine the time difference.  This rough analysis did not check 
every day or every possible peak, but gives a picture of the approximate time over the 
deployment period.

During the PVC deployment the CCN200 files were storing the local time instead of UTC.  
During the 1st time range the local time was EDT.  The CCN time was ~4 hours +/- 150sec. 
behind the CPC.  Due to the way the CCN scans it is hard to get an exact time difference.  
During the second time range the local time was EST and the CCN was ~5hours +/- 500 sec. 
behind the PSAP.
Measurements:pvcaosccn200S1.a1:
  • CCN_P_sample_2
  • CCN_P_sample_1
  • time_offset
  • CCN_temp_unstable_flag_2
  • Cloud droplet concentration number from summation of condensation nuclei counter
    size bins(N_CCN_1)
  • CCN_first_stage_monitor_voltage_2
  • CCN_first_stage_monitor_voltage_1
  • N_CCN_bin_number_1
  • CCN_temp_unstable_flag_1
  • AOS number concentration of CCN, second column(N_CCN_2)
  • N_CCN_bin_number_2
  • CCN_OPC_set_2
  • CCN_OPC_set_1
  • CCN_inlet_set_2
  • CCN_inlet_set_1
  • time
  • East longitude(lon)
  • CCN_baseline_monitor_2
  • CCN_baseline_monitor_1
  • CCN_Q_sheath_1
  • CCN_Q_sheath_2
  • Altitude above mean sea level(alt)
  • CCN_T_set_TEC2_2
  • CCN_T_set_TEC3_2
  • CCN_T_set_TEC3_1
  • CCN_T_set_TEC2_1
  • base_time
  • CCN_overflow_1
  • CCN_T_read_TEC2_2
  • CCN_overflow_2
  • Size of upper limit of each CCN bin(CCN_upper_size_limit)
  • CCN_T_set_TEC1_1
  • CCN_Q_sample_1
  • CCN_T_set_TEC1_2
  • CCN_T_read_TEC2_1
  • CCN_Q_sample_2
  • CCN_T_read_TEC1_2
  • CCN_T_read_TEC1_1
  • CCN_temperature_gradient_2
  • CCN_T_inlet_2
  • CCN_ss_set_1
  • CCN_T_inlet_1
  • CCN_ss_set_2
  • CCN_temperature_gradient_1
  • CCN_T_nafion_2
  • CCN_T_nafion_1
  • CCN_T_read_TEC3_2
  • CCN_T_read_TEC3_1
  • CCN_T_OPC_2
  • CCN_T_OPC_1
  • CCN_nafion_set_2
  • AOS CCN droplet count by bin size, second column(N_CCN_dN_2)
  • AOS CCN droplet count by bin size, first column(N_CCN_dN_1)
  • CCN_laser_current_1
  • CCN_laser_current_2
  • CCN_alarm_code
  • CCN_nafion_set_1
  • CCN_T_sample_1
  • CCN_T_sample_2
  • CCN_proportional_valve_voltage_2
  • CCN_proportional_valve_voltage_1
  • North latitude(lat)


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