| Subject: | NSA/AERI/C1 - Blower motor failure |
| DataStreams: | nsaaeriC1.00, nsaaerich2C1.b1, nsaaeriengineerC1.b1, nsaaerilblcloudsC1.c1,
nsaaerirawC1.00, nsaaerisummaryC1.b1
|
| Description: | 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. |
| Measurements: | nsaaeriC1.00: - null(Raw data stream - documentation not supported)
nsaaerilblcloudsC1.c1: - Calculated cloud cover fraction from the WSI(cloud_cover_fract)
- Average of brightness temperatures calculated from AERI radiances within
spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2) - Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)
nsaaerirawC1.00: - null(Raw data stream - documentation not supported)
nsaaerich2C1.b1: - Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
- Mean of radiance spectra ensemble(mean_rad)
nsaaeriengineerC1.b1: - Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
- Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
- Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
- Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
- Shortwave surface air brightness temperature from radiance average (2295_2300
cm-1)(surfaceLayerAirTemp2295_2300) - 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)
- 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 window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
nsaaerisummaryC1.b1: - Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
- Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
- Shortwave surface air brightness temperature from radiance average (2295_2300
cm-1)(surfaceLayerAirTemp2295_2300) - Shortwave elevated air brightness temperature from radiance average (2282_2287
cm-1)(elevatedLayerAirTemp2282_2287) - Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
- Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
- Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_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)
- AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
- AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
- AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
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