SGP/SONDE - Suspect pressure data

There was an apparent pressure jump at launch for this sounding.  The surface pressure 
value was entered as 987.7 hPa and the first reading from the sonde after launch was 977.0 
hPa.  The corresponding THWAPS data at the surface was 986.3 hPa.  Checking the absolutely 
raw data, however, shows that the sonde was reading 979.2 hPa just before launch.  It 
thus appears that (1) the radiosonde absolute pressure values were low by about 10 hPa, and 
(2) the operator entered an incorrect (possible digit translation) pressure value into 
the log and sounding.  The effect of this will be that the absolute altitude and pressure 
for this sounding are suspect, and that the ascent rates will be incorrect during the 
first 30 seconds of flight.

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• Wind Speed(wspd)
• Ascent rate(asc)
• Relative Humidity (hybrid-b grid)(rh)
• North Latitude(lat)
• Time offset from base_time(time_offset)
• -180.0 - +180.0(alt)
• Retrieved pressure profile(pres)
• base time in epoch(base_time)
• Dewpoint Temperature(dp)
• lon(lon)
• Wind status(wstat)
• Dry Bulb Temperature(tdry)
• Wind Direction(deg)

• base time in epoch(base_time)
• lon(lon)
• Wind Direction(deg)
• Dry Bulb Temperature(tdry)
• Wind status(wstat)
• Dewpoint Temperature(dp)
• Easterly Wind Component(u_wind)
• Time offset from base_time(time_offset)
• North Latitude(lat)
• V wind component(v_wind)
• -180.0 - +180.0(alt)
• Wind Speed(wspd)
• Relative Humidity (hybrid-b grid)(rh)
• Ascent rate(asc)
• Retrieved pressure profile(pres)

• (Raw data stream - documentation not supported)