MAG/CCN/M1 - Problem with time fields

During the deployment the instrument time for the CCN was not automatically synched and 
tended to drift relative to the time corrected by a time server. In addition, the clock was 
set 1 hour off during the first time range.  

During the first time range the CCN time was fast from ~55 to 72 minutes

During the second time range the CCN time was fast from ~1 to 10 minutes.  

These approximations were determined by comparing the time of spikes in UHSAS CPC data and 
are very rough.

A document attached to DQPR 4362 shows the time of the peaks used to approximate the error 
in the time.

Use the data averaged over longer periods.  


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• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN logical value, indicating whether the instrument has reached thermal
  gradient stabilization and is within 0.4 degrees C of the set point(CCN_temp_unstable_flag)
• CCN Proportional valve voltage(CCN_proportional_valve_voltage)
• First stage monitor voltage(CCN_first_stage_monitor_voltage)
• AOS CCN super saturation (calculated)(CCN_super_saturation_calculated)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• base time in epoch(base_time)
• AOS CCN observed temperature at middle of column(CCN_t_read_TEC2)
• AOS CCN (read) temperature at bottom of column(CCN_t_read_TEC3)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• Standard deviation of CCN temperature gradient (CCN_t_read_TEC3 -
  CCN_t_read_TEC1)(CCN_temperature_std)
• AOS CCN OPC laser current(CCN_laser_current)
• AOS CCN observed temperature at top of column(CCN_t_read_TEC1)
• Bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• Temperature difference between CCN_t_set_TEC3 and CCN_t_set_TEC1(CCN_temperature_gradient)
• Time offset from base_time(time_offset)
• Cloud condensation nuclei number density(N_CCN)
• time_in_seconds_since_volume_start(time)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)