NSA/MWR/C2 - Frosting/Condensation

Doug reported freezing winds and ice accumulation on the MWR cover and radome. This may 
affect data quality and calibration. 
On 2/24 Doug attempted to slowly thaw the cover and clear the window.
From 2/22 to 2/24 the LWP and PWV reported by the MWR are near zero. These data are 
probably affected by the frost accumulated on the radiometer window.

• Mean 31.4 GHz sky brightness temperature(tbsky31)
• lon(lon)
• 23.8 GHz sky signal(sky23)
• Averaged total liquid water along LOS path(liq)
• MWR column precipitable water vapor(vap)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz sky signal(sky31)
• Mean 23.8 GHz sky brightness temperature(tbsky23)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• 31.4 GHz sky signal(tipsky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• 23.8 GHz sky signal(tipsky23)

NSA/MWR/C1 - TKAIR sensor failure

Between 7/14 and 7/28 the tkair variable is missing most of the time and sometimes has 
large negative spikes.  On 7/28, the sensor was cleaned of corrosion and the readings came 
back to normal.

• Ambient temperature(tkair)

NSA/MWR/C2 - Spikes in air temperature readings

The tkair variable has occasional spikes due to sensor corrosion. On 8/1, the temperature 
sensor was replaced.

• Ambient temperature(tkair)

NSA/MWR/C1 - Rain sensor always on

The rain sensor was always on between 10/5 and 10/23 2006.
The user should be aware that not all data flagged as rainy are actually rainy. The 
problem was caused by a shift in the sensitivity of the rain sensor and was corrected by 
changing the sensor threshold in the configuration file.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)