NSA/AERI/C1 - Snow in enclosure

A heavy, wet snowstorm late on April 17th and early on the 18th resulted in wet snow 
packing around the arms of the AERI's hatch controller.  This resulted in the ventilator fan 
not shutting down when the hatch closed, and thus snow was packed into the front of the 
AERI (i.e., around the scene mirror and blackbodies).  The data for this period should not 
be used.

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

• Dummy altitude for Zeb(alt)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Mean of radiance spectra ensemble(mean_rad)
• BB Support Structure Temperature(BBsupportStructureTemp)
• lat(lat)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Observation Altitude(Altitude)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Julian Day including day and fraction of day(JulianDay)
• Duration of scene view(sceneViewDuration)
• Wave number(wnum)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Observation latitude(Latitude)
• Version number of Operational Software(systemReleaseNumber)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Observation longitude(Longitude)
• Character string containing instrument name(instrumentUnitNumber)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Time offset of tweaks from base_time(time_offset)
• time(time)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• base time(base_time)
• Observation date(dateYYMMDD)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• lon(lon)
• Time (HHMMSS)(timeHHMMSS)
• AERI instrument data channel number(channelNumber)

• Dummy altitude for Zeb(alt)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Wave number in reciprocal centimeters(wnumsum9)
• AERI instrument unit serial number(AERIunitNumber)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Observation longitude(Longitude)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• xxx(dataAvailable)
• Wave number in reciprocal centimeters(wnumsum6)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Observation date(dateYYMMDD)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Wave number in reciprocal centimeters(wnumsum2)
• Time (HHMMSS)(timeHHMMSS)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• 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)
• Observation latitude(Latitude)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Julian Day including day and fraction of day(JulianDay)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Version number of Operational Software(systemReleaseNumber)
• Wave number in reciprocal centimeters(wnumsum3)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Wave number in reciprocal centimeters(wnumsum4)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Duration of scene view(sceneViewDuration)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Wave number in reciprocal centimeters(wnumsum12)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Time offset of tweaks from base_time(time_offset)
• Wave number in reciprocal centimeters(wnumsum8)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Wave number in reciprocal centimeters(wnumsum13)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• Wave number in reciprocal centimeters(wnumsum14)
• time(time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Wave number in reciprocal centimeters(wnumsum1)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Wave number in reciprocal centimeters(wnumsum11)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• base time(base_time)
• lat(lat)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• Wave number in reciprocal centimeters(wnumsum10)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• Wave number in reciprocal centimeters(wnumsum7)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• lon(lon)
• Wave number in reciprocal centimeters(wnumsum5)
• Character string containing instrument name(instrumentUnitNumber)
• Observation Altitude(Altitude)
• AERI instrument data channel number(channelNumber)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)

• AERI instrument data channel number(channelNumber)
• Ambient air temperature at hatch opening(outsideAirTemp)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• Observation Altitude(Altitude)
• Version number of Operational Software(systemReleaseNumber)
• Mean of radiance spectra ensemble(mean_rad)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• AERI instrument unit serial number(AERIunitNumber)
• Wave number(wnum)
• Time at center of AERI sky observation period(Time_UTC_hours)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Dummy altitude for Zeb(alt)
• time(time)
• Observation longitude(Longitude)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Julian Day including day and fraction of day(JulianDay)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Observation date(dateYYMMDD)
• Duration of scene view(sceneViewDuration)
• base time(base_time)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Observation latitude(Latitude)
• Time (HHMMSS)(timeHHMMSS)
• Character string containing instrument name(instrumentUnitNumber)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• lon(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)