SGP/SONDE - Pressure jump at launch/incorrect surface values

There are two problems here.  First, the operator entered the values
of PTU obtained from the THWAPS as the surface values for this sounding
instead of the sonde values.  In doing so, the surface pressure was
entered incorrected (OMIS log shows both sonde and THWAPS at 969.0),
surface value is entered as 969.9.  The second problem is that apparently
the system misidentified the time of release and as a result the ascent
rates are wrong for the first 30 seconds.  The time of release problem
was caused because the operator started a new sonde instead of resetting
the system.  I am assuming that the values of PTU are correct, but I
have no way of knowing the relationship betweeen the time into the
sounding and the actual altitude/pressures.  It seems likely that the
altitudes are OK but that they do not correspond to the actual times
after phyical launch.

• pres
• lat
• tdry
• alt
• asc
• dp
• time_offset
• base_time
• deg
• u_wind
• wstat
• rh
• lon
• v_wind
• wspd

• Raw data stream - documentation not supported

• base_time
• rh
• wspd
• deg
• lon
• asc
• time_offset
• tdry
• lat
• wstat
• dp
• pres
• alt