PVC/CCN/S1 - Problem with time fields

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.

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• AOS CCN set point for temperature at middle of column, second column(CCN_T_set_TEC2_2)
• AOS CCN voltage used by DMT for OPC diagnostic purposes, second column(CCN_baseline_monitor_2)
• AOS CCN Nafion temperature, second column(CCN_T_nafion_2)
• time_in_seconds_since_volume_start(time)
• AOS CCN sample saturation setpoint value reported by instrument, second CCN(CCN_ss_set_2)
• AOS CCN Nafion temperature, first CCN(CCN_T_nafion_1)
• AOS CCN set point for temperature at middle of column, first CCN(CCN_T_set_TEC2_1)
• AOS CCN sample saturation setpoint value reported by instrument, first CCN(CCN_ss_set_1)
• AOS number concentration of CCN at supersaturation step 1(N_CCN_1)
• AOS CCN voltage used by DMT for OPC diagnostic purposes, first CCN(CCN_baseline_monitor_1)
• AOS number concentration of CCN at supersaturation step 2(N_CCN_2)
• AOS CCN observed temperature at middle of column, second column(CCN_T_read_TEC2_2)
• CCN Proportional valve voltage, first column(CCN_proportional_valve_voltage_1)
• CCN Proportional valve voltage, second column(CCN_proportional_valve_voltage_2)
• -180.0 - +180.0(alt)
• Time offset from base_time(time_offset)
• AOS CCN observed temperature at middle of column, first column(CCN_T_read_TEC2_1)
• AOS CCN OPC laser current, first column(CCN_laser_current_1)
• AOS CCN OPC laser current, second column(CCN_laser_current_2)
• AOS CCN temperature of sample air entering the column, first column(CCN_T_sample_1)
• AOS CCN temperature of sample air entering the column, second column(CCN_T_sample_2)
• North Latitude(lat)
• Size of upper limit of each CCN bin(CCN_upper_size_limit)
• AOS CCN number concentration by bin, second CCN(N_CCN_dN_2)
• AOS CCN droplet count by bin size, first column(N_CCN_dN_1)
• AOS bin number of lowest channel of OPC include in summation of N_CCN, second
  column(N_CCN_bin_number_2)
• AOS bin number of lowest channel of OPC include in summation of N_CCN, first
  column(N_CCN_bin_number_1)
• AOS CCN set point for temperature at bottom of column, first CCN(CCN_T_set_TEC3_1)
• AOS CCN volumetric flowrate of sheath air, second CCN(CCN_Q_sheath_2)
• AOS CCN set point for temperature at bottom of column, second column(CCN_T_set_TEC3_2)
• AOS CCN volumetric flow rate of sheath air, first column(CCN_Q_sheath_1)
• AOS CCN sample pressure, first column(CCN_P_sample_1)
• AOS CCN sample pressure, second CCN(CCN_P_sample_2)
• AOS CCN set point for temperature at top of column, first column(CCN_T_set_TEC1_1)
• AOS CCN set point for temperature at top of column, second column(CCN_T_set_TEC1_2)
• AOS CCN (read) temperature at bottom of column, first CCN(CCN_T_read_TEC3_1)
• Number of particles that are larger than 10um, first column(CCN_overflow_1)
• AOS CCN (read) temperature at bottom of column, second CCN(CCN_T_read_TEC3_2)
• Number of particles that are larger than 10um, second column(CCN_overflow_2)
• AOS CCN temperature of the optical particle counter, first column(CCN_T_OPC_1)
• base time in epoch(base_time)
• AOS CCN temperature of the optical particle counter, second column(CCN_T_OPC_2)
• AOS CCN observed temperature at top of column, first CCN(CCN_T_read_TEC1_1)
• AOS CCN observed temperature at top of column, second CCN(CCN_T_read_TEC1_2)
• Hexadecimal flag, non-zero value means instrument is not operating stably, first
  CCN(CCN_temp_unstable_flag_1)
• AOS CCN volumetric flowrate of sample air, first CCN(CCN_Q_sample_1)
• AOS CCN temperature of sample air at entrance to instrument, first_column(CCN_T_inlet_1)
• CCN temperature gradient, second CCN(CCN_temperature_gradient_2)
• AOS CCN temperature of sample air at entrance to instrument, second CCN(CCN_T_inlet_2)
• CCN temperature gradient, first CCN(CCN_temperature_gradient_1)
• AOS CCN volumetric flowrate of sample air, second CCN(CCN_Q_sample_2)
• Hexadecimal flag, non-zero value means instrument is not operating stably,
  second CCN(CCN_temp_unstable_flag_2)
• CCN alarm code expressed as a summation of powers of 2. 0 indicates no detected
  problem(CCN_alarm_code)
• First stage monitor voltage, second column(CCN_first_stage_monitor_voltage_2)
• First stage monitor voltage, first column(CCN_first_stage_monitor_voltage_1)
• AOS CCN set temperature for the Nafion humidifier, second CCN(CCN_nafion_set_2)
• AOS CCN set point temperature for the inlet manifold, first CCN(CCN_inlet_set_1)
• AOS CCN set point temperature for the inlet manifold, second CCN(CCN_inlet_set_2)
• AOS CCN set temperature for the Nafion humidifier, first CCN(CCN_nafion_set_1)
• AOS CCN set point temperature for the optical partical counter (OPC), second CCN(CCN_OPC_set_2)
• AOS CCN set point temperature for the optical partical counter (OPC), first CCN(CCN_OPC_set_1)
• lon(lon)