D Q R Report

DQRID : D050217.2

Start Date	Start Time	End Date	End Time	Data Quality Metric
02/09/2005	2300	02/10/2005	2300	Suspect

Subject:	NSA/AERI/C1 - Blower motor failure
DataStreams:	nsaaerich2C1.b1, nsaaerisummaryC1.b1, nsaaerilblcloudsC1.c1, nsaaeriC1.00, nsaaerirawC1.00, nsaaeriengineerC1.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.
Suggestions:
Measurements:	nsaaerirawC1.00: Raw data stream - documentation not supported more nsaaeriengineerC1.b1: surfaceLayerAirTemp2295_2300 skyViewStdDevRadiance2282_2287 shortwaveWindowAirTemp2510_2515 skyViewStdDevRadiance2510_2515 skyViewImaginaryRadiance2282_2287 skyViewImaginaryRadiance2510_2515 surfaceLayerRadiance2295_2300 skyViewStdDevRadiance2295_2300 skyViewImaginaryRadiance2295_2300 shortwaveWindowRadiance2510_2515 more nsaaerisummaryC1.b1: skyViewStdDevRadiance2282_2287 surfaceLayerRadiance2295_2300 shortwaveWindowAirTemp2510_2515 elevatedLayerRadiance2282_2287 SkyUniformityCh2 elevatedLayerAirTemp2282_2287 skyViewStdDevRadiance2295_2300 surfaceLayerAirTemp2295_2300 SkyRadianceSpectralAveragesCh2 skyViewStdDevRadiance2510_2515 SkyBrightnessTempSpectralAveragesCh2 shortwaveWindowRadiance2510_2515 more nsaaerilblcloudsC1.c1: cloud_cover_fract cbh_AERI_channel_2 mean_AERI_BT_channel_2 more nsaaeriC1.00: Raw data stream - documentation not supported more nsaaerich2C1.b1: mean_rad standard_dev_mean_rad more

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