NSA/AERI/C1 - Blower motor failure

The blower motor failed on February 9, estimated time 23:00 GMT. The problem was repaired 
on February 10, 23:00 GMT. The blower motor serves two functions. It maintains the 
instrument window enclosure at the outside temperature and blows ice crystals from the 
enclosure. Failure of the motor caused the enclosure temperature to increase by approximately 12K 
(from 255 to 267K). Previous experience in comparing arctic instruments with the blower 
on and off have shown that if ice crystals enter the enclosure, there is a slight 
increase in the 3-5 um (ch 2) spectral intensity. It is unlikely that Ch 1 is affected.

• (Raw data stream - documentation not supported)

• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Sky view imaginary radiance (2282_2287 cm^-1)(skyViewImaginaryRadiance2282_2287)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Sky View Imaginary Radiance (2295_2300 cm^-1)(skyViewImaginaryRadiance2295_2300)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)

• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Shortwave radiance average (2282_2287 cm^-1) elevated air(elevatedLayerRadiance2282_2287)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• AERI SW scene radiance spectral averages (ch2)(SkyRadianceSpectralAveragesCh2)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• AERI SW scene brightness temp spectral averages (ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)

• Calculated cloud cover fraction from the WSI(cloud_cover_fract)
• Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2)

• (Raw data stream - documentation not supported)

• Mean of radiance spectra ensemble(mean_rad)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)