MAG/UHSAS/M1 - Problem with time fields

During the 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 20 to 360 seconds fast.  This has been determined by comparing 
the time of spikes in UHSAS CPC data.  

Aside from jumps in the time the UHSAS seems to always be drifting faster compared to the 
CPC.  

For the period from 10/18/2012 9:41:45.70 until 10/27/2012 21:06:41.90 the UHSAS is fast 
approximately 30sec.

For the period from 11/06/2012 3:38:42.00 until 12/13/2012 9:35:36.30 the UHSAS is fast 
approximately 60 to 90 sec.

For the period from 05/11/2013 22:37:37.90 until 07/03/2013 8:50:02.80 the UHSAS is fast 
approximately 210 to 360 sec.

For the period from 07/07/2013 23:14:40.00 until 09/25/2013 20:42:48.70 the UHSAS is fast 
approximately 30 to 240 sec.

Documents attached to DQPR 4363 show the time of the peaks used to approximate the error 
in the time.

• upper_size_limit
• purge_flow
• unit_temperature
• sheath_flow
• flow
• current
• reference
• differential_voltage
• sampling_volume
• bin_num
• scattering_voltage
• lower_size_limit
• Particle size distribution, limited by lower_size_limit and upper_size_limit(size_distribution)
• auxiliary
• sample_pressure
• MET air temperature(temperature)

MAG/AOS/ALL/M1/S1/S2 - Ship in port

The ship was in port during these periods and the measurements may be affected by various 
sources (overhead cranes, anthropogenic sources, etc).

Note: Dates and times were found by looking at the NAV datastream.  The standard deviation 
of pitch, roll, and surge velocity were used to determine when the ship was slowing down 
to enter port or speeding up to leave port.  Thresholds used; pitch (0.01), roll (0.01), 
surge velocity (3.0)

• upper_size_limit
• purge_flow
• unit_temperature
• base_time
• sheath_flow
• time
• North latitude(lat)
• flow
• current
• reference
• Altitude above mean sea level(alt)
• differential_voltage
• sampling_volume
• bin_num
• scattering_voltage
• lower_size_limit
• Particle size distribution, limited by lower_size_limit and upper_size_limit(size_distribution)
• time_offset
• East longitude(lon)
• sample_pressure
• MET air temperature(temperature)
• auxiliary