SGP/MWR/C1 - Increased noise in 31.4 GHz channel

The 31.4 GHz channel has been showing an increased level of noise which results in 
increased noise in the LWP retrievals. The instrument is tipping and all other parameters seem 
to be in the range. The elevate noise started in May, but it seems to have become slightly 
worse after summer. After November the noise level seems to have gone back to normal.

Examine data to detect presence of increased noise and smooth if necessary

• 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)
• Mean 31.4 GHz sky brightness temperature(tbsky31)