NSA/AERI/C1 - AERI infiltrated by packed snow

A strong storm with blowing and drifting snow occurred March 9th and 10th during which 
time the hatch remained open and snow entered the front end of the AERI enclosure.

During the period, the snow obscured scene mirror views of downwelling radiance as well as 
views into the Black Body cavities which provide reference radiances used for 
calibration. Snow also collected around components inside the enclosure thereby possibly 
interfering with scene mirror views after the storm until the snow was removed and the front end 
compartment was dried late on March 13th.

Possible corrupting effects apply to all measurement data streams. Measurements are 
probably bad during the period of the storm and suspect following the storm through March 13th.

• BB Support Structure Temperature(BBsupportStructureTemp)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• 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)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Mean of radiance spectra ensemble(mean_rad)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Duration of scene view(sceneViewDuration)
• Wave number(wnum)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• wavenumbers for standard deviation of radiance spectra(wnum2)

• Wave number in reciprocal centimeters(wnumsum9)
• Ambient air temperature at hatch opening(outsideAirTemp)
• 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)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Wave number in reciprocal centimeters(wnumsum2)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• 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)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Wave number in reciprocal centimeters(wnumsum3)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• 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(wnumsum8)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• 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)
• Wave number in reciprocal centimeters(wnumsum5)
• 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 LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• 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)
• Wave number in reciprocal centimeters(wnumsum6)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• 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)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• 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)
• Wave number in reciprocal centimeters(wnumsum13)
• Wave number in reciprocal centimeters(wnumsum14)
• 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)
• Wave number in reciprocal centimeters(wnumsum10)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)

• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm-1(SWskyNEN)
• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• Hot blackbody temperature - apex(HBBapexTemp)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Number of complete (forward+backward) interferogram scans in sample average(coadditionsCount)
• Longwave window brightness temperature from radiance average (985_990 cm-1)(longwaveWindowAirTemp985_990)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Spare temperature sensor (location TBD)(spareTemp)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• 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)
• Radiance standard deviation during sky view averaged over (985_990 cm-1)(skyViewStdDevRadiance985_990)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Detector temperature sensed via diode near detector(detectorTemp)
• Number of terms used in finite field of view correction(numberOfTerms)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Radiance standard deviation during sky view averaged over (2510_2515 cm-1)(skyViewStdDevRadiance2510_2515)
• Ambient blackbody temperature(ABBbottomTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Shortwave window radiance average (2510_2515 cm-1)(shortwaveWindowRadiance2510_2515)
• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Stirling cycle cooler current(coolerCurrent)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Duration of scene view(sceneViewDuration)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Longwave radiance average (700_705 cm-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Longwave window radiance average (985_990 cm-1)(longwaveWindowRadiance985_990)
• Blackbody cavity geometry factor(BBcavityFactor)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• 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)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Signal conditioning electronics inside air temperature(SCEtemp)
• AERI ingest computer temperature measured at back panel of computer(computerTemp)
• Shortwave radiance average (2295_2300 cm-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave radiance average (2282_2287 cm-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Radiance standard deviation during sky view averaged over (2295_2300 cm-1)(skyViewStdDevRadiance2295_2300)
• Number of views in a sequence(sceneMirPosCount)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Scene mirror motor case temperature(mirrorMotorTemp)
• 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)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)

• Observation relative humidity at AERI blackbodies(atmosphericRelativeHumidity)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• AERI instrument unit serial number(AERIunitNumber)
• Wave number(wnum)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Logical flag indicating that a data record is missing (true/false(missingDataFlag)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Mean of radiance spectra ensemble(mean_rad)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Standard deviation of radiance spectra ensemble(standard_dev_mean_rad)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• 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)
• Duration of scene view(sceneViewDuration)
• Logical flag indicating whether hatch is open (true) or not open (false)(hatchOpen)