There is a discrepency between the surface pressure and temperature data entered by the
operator and that recorded by the THWAPS. Review of the raw data from the radiosonde shows
that the pressure was periodically varying by as much as 12 hPa (~988 to 1000)in the
time period before launch. The operator entry of 998.2 is at the high end of this range -
the concurrent THWAPS reading was about 988.4 at the low end. The operator entered
temperature 6.2 degC is considerably higher than the THWAPS value of 1.8. The pre-flight log
entry for this sounding is missing from the OMIS database. If not for the extremely
unstable pressure reading I would have assumed this was an operator error. It will take some
more research to figure out what is going on. |