TWP/SONDE/C2  - RH sensor failure below 9km

It appears that the RH sensor heating circuit failed during this sounding.  The RH 
oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems 
to stop when the temperature is below ~35 degC.  According to Vaisala these are symptoms 
of failure in the ASIC (application specific integrated circuit) that controls the heating.

Some data may be recovered by analysis of the raw data.  The RH also might be 

recovered (though at some degrading of the vertical resolution) by choosing only the highest RH 
values within each two-minute period of the sounding in this area.

• rh
• dp