SGP/THWAPS/C1 - RH Sensor Calibration

The analog output for the T/RH probe was incorrectly calibrated.  This
caused excessively high readings of RH.

• Standard Deviation of Relative Humidity(sd_rh)
• Standard deviation of vapor pressure(sd_vap_pres)
• Vapor Pressure (kiloPascals)(vap_pres)
• Relative Humidity (hybrid-b grid)(rh)