SGP/SONDE/C1 - Bad RH Data

The RH values below 6 km are incorrect.  The problem relates to a failure of the GC25 
ground check set used before this particular sounding.  The failure seems to have affected 
the sensor calibration with the effect that one of the two sensors was reading artificially 
high.  Because the internal processing software uses the highest of the two sensor 
readings, the bad sensor value is chosen whenever it is not heated.

I can imagine a fairly involved one-time-only software reprocessing of these data, 

but I don't think it worth the effort that would be required.  I would just ignore the RH 
data in this sounding.

• rh
• dp