SGP/MWR/C1 - thermal instability

The analog board was replaced with a spare (D041001.3) with a reference temperature that 
was set too low (306 K) so that during periods of high ambient temperature, the instrument 
became thermally unstable. The problem was corrected when the temperature setting was 
increased (to 311 K).

The data are suspect when the air temperature, tkair, exceeds 297 K.

• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Averaged total liquid water along LOS path(liq)
• Total water vapor along LOS path(vap)

• 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

• Averaged total liquid water along LOS path(liq)
• Total water vapor along LOS path(vap)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean 31.4 GHz sky brightness temperature(tbsky31)