MAO/UHSAS/S1 - Problem with time fields

During the MAO deployment the instrument time for the UHSAS was not automatically synched 
and
tended to drift fast relative to the time corrected by a time server. The time of the data 
in
the files is about 0 to 250 seconds fast. This has been determined by comparing the time 
of
spikes in UHSAS CPC data. The discrepancy does not jump around.  The time gradually gets 
faster until it is resynched.

The  Documents  shows the time of the peaks used to approximate the 
error in the time. 

During the second time range the UHSAS clock was synced manually each month when the MAO 
systems were rebooted.  The time was generally within 30 seconds of being correct when it 
was synced.

Average data for longer periods.
Compare peaks with other instruments to calculate how far off the time was.

• Differential_voltage, see instrument manual(differential_voltage)
• Current(current)
• time_in_seconds_since_volume_start(time)
• Purge flow(purge_flow)
• Scatter signal(scattering_voltage)
• Upper particle size limit for each bin(upper_size_limit)
• Particle size distribution(size_distribution)
• Reference(reference)
• Sample volume(sampling_volume)
• Sample pressure(sample_pressure)
• Lower particle size limit for each bin(lower_size_limit)
• Unit temperature(unit_temperature)
• Temperature used for calculation(temperature)
• Sheath flow(sheath_flow)
• base time in epoch(base_time)
• Bin number(bin_num)
• Time offset from base_time(time_offset)
• Auxiliary measurement, not implemented(auxiliary)
• Main flow rate(flow)