DQRID : D090414.2
Start DateStart TimeEnd DateEnd Time
03/09/2009140003/10/20092100
03/10/2009210003/13/20092315
more
Subject:
NSA/AERI/C1 - AERI infiltrated by packed snow
DataStreams:nsaaerich1C1.b1, nsaaeriengineerC1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1
Description:
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.
Suggestions: 
Measurements:nsaaerich1C1.b1:
  • Ambient temperature used in calibration(calibrationAmbientTemp)
  • Duration of scene view(sceneViewDuration)
  • BB Support Structure Temperature(BBsupportStructureTemp)
  • Relative humidity measured near Blackbodies. Use with air temperature near BBs
    only.(atmosphericRelativeHumidity)
  • 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 atmospheric pressure in AERI electronics(atmosphericPressure)
  • Ambient air temperature at hatch opening(outsideAirTemp)
  • Hot blackbody temperature used in calibration(calibrationHBBtemp)
  • Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
  • Boolean with negative error conditions: 1:Open 0:Closed -1:Fault -2:Outside
    Valid Range -3:Neither Open Nor Closed(hatchOpen)
  • wavenumbers for mean radiance spectra(wnum)
  • Difference between the sky view\'s radiance variance and the hot black body
    view\'s variance(standard_dev_mean_rad)
  • Wave number in reciprocal centimeters(wnum2)
  • AERI instrument unit serial number(AERIunitNumber)
  • Mean of radiance spectra ensemble(mean_rad)
  • Scene mirror view angle in non-negative degrees, measured clockwise from nadir
    looking into interferometer window(sceneMirrorAngle)
  • Cold blackbody temperature used in calibration(calibrationCBBtemp)
more
nsaaeriengineerC1.b1:
  • Electronics rack ambient temperature(rackAmbientTemp)
  • Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
  • Original Laser Wavenumber(originalLaserWavenumber)
  • Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
  • Sun sensor intensity(sunSensorIntensity)
  • The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
    centered on the scene view(HBBtempDrift)
  • Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
  • Resistive temperature of 2500 ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
  • Decimal representation of percentage weighting of ambient blackbody apex
    temperature(ABBapexTempWeight)
  • The noise equivalent radiance observed in the longwave channel during a sky view
    at 1000 cm-1(LWskyNEN)
  • Blackbody controller unit 2 power supply temperature(BBcontroller2temp)
  • Interferometer Window Temperature(interferometerWindowTemp)
  • ABB View Radiance Std Deviation (675_680 cm^-1)(ABBviewStdDevRadiance675_680)
  • Cold blackbody temperature used in calibration(calibrationCBBtemp)
  • Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
  • Ambient blackbody temperature(ABBbottomTemp)
  • Weight factor for bottom used in calculating ambient blackbody temperature
    average(ABBbottomTempWeight)
  • Optics Compartment Relative Humidity(opticsCompartmentRelativeHumidity)
  • HBB view radiance standard deviation (2510_2515 cm^-1)(HBBviewStdDevRadiance2510_2515)
  • Characteristic value representing overall longwave channel responsivity(LWresponsivity)
  • Boolean with negative error conditions: 1:Open 0:Closed -1:Fault -2:Outside
    Valid Range -3:Neither Open Nor Closed(hatchOpen)
  • Longwave elevated air brightness temperature from radiance average (700_705
    cm-1)(elevatedLayerAirTemp700_705)
  • ABB view radiance standard deviation (700_705 cm^-1)(ABBviewStdDevRadiance700_705)
  • Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
  • ABB view radiance standard deviation (2510_2515 cm^-1)(ABBviewStdDevRadiance2510_2515)
  • Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
  • Longwave radiance average (700_705 cm^-1) elevated air(elevatedLayerRadiance700_705)
  • Stirling cycle cooler expander temperature(coolerExpanderTemp)
  • Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
  • Hot blackbody temperature - apex(HBBapexTemp)
  • ABB View Radiance Std Deviation (2295_2300 cm^-1)(ABBviewStdDevRadiance2295_2300)
  • Hot blackbody temperature used in calibration(calibrationHBBtemp)
  • Corrective offset for final hot blackbody average temperature(HBBtempOffset)
  • Front end fan air temperature difference(frontEndFanAirTempDiff)
  • Ingest computer temperature(computerTemp)
  • Number of complete (forward+backward) interferogram scans in sample average(coadditionsCount)
  • Signal conditioning electronics inside air temperature(SCEtemp)
  • Radiance standard deviation during ambient blackbody view averaged over (985_990
    cm-1)(ABBviewStdDevRadiance985_990)
  • Logical flag indicating whether longwave channel noise equivalent radiance is
    acceptable in sky view (true/false). Determined using LWskyNEN and
    LWskyNENlimit.(LWskyNENacceptable)
  • Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
  • Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
  • 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)
  • Stirling cycle cooler current(coolerCurrent)
  • Maximum temperature difference between HBB thermistors(HBBmaxTempDiff)
  • Shortwave scene NEN limit(SWskyNENlimit)
  • Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
  • Ambient blackbody temperature - rim top(ABBtopTemp)
  • Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
  • Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
  • Detector Temperature(detectorTemp)
  • Maximum temperature difference between ABB thermistors(ABBmaxTempDiff)
  • Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
  • Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
  • Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
  • Scene mirror motor driver heat sink temperature(motorDriverTemp)
  • Ambient air temperature at hatch opening(outsideAirTemp)
  • Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
  • Hot blackbody temperature - rim top(HBBtopTemp)
  • Difference between actual and ideal motor encoder values for current view
    indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
  • HBB view radiance standard deviation (700_705 cm^-1)(HBBviewStdDevRadiance700_705)
  • Observation atmospheric pressure in AERI electronics(atmosphericPressure)
  • Scene mirror position count; number of viewers in a sequence(sceneMirPosCount)
  • Sky View Imaginary Radiance (675_680 cm^-1)(skyViewImaginaryRadiance675_680)
  • Number of terms in FFOV corrections(numberOfTerms)
  • Blackbody cavity geometry factor(BBcavityFactor)
  • Instrument scene mirror position identifier(sceneMirrorPosition)
  • Shortwave HBB Noise-equivalent Radiance(SW_HBB_NEN)
  • Scene mirror position encoder value(sceneMirPosEncoder)
  • Sky view imaginary radiance (2282_2287 cm^-1)(skyViewImaginaryRadiance2282_2287)
  • HBB View Radiance Std Deviation (2295_2300 cm^-1)(HBBviewStdDevRadiance2295_2300)
  • Interferometer Enclosure Relative Humidity(interferometerEnclosureRelativeHumidity)
  • Logical flag indicating whether HBB temperature is stable (true) or not stable
    (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
  • Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
  • Limit in Hot-blackbody Temperature Drift(HBBtempDriftLimit)
  • Longwave HBB noise-equivalent radiance(LW_HBB_NEN)
  • HBB view radiance standard deviation (2282_2287 cm^-1)(HBBviewStdDevRadiance2282_2287)
  • BB Support Structure Temperature(BBsupportStructureTemp)
  • FFOV half angle(FFOVhalfAngle)
  • Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
  • Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
  • Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
  • Ambient temperature used in calibration(calibrationAmbientTemp)
  • Spare temperature sensor (location TBD)(spareTemp)
  • Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
  • Shortwave radiance average (2282_2287 cm^-1) elevated air(elevatedLayerRadiance2282_2287)
  • Logical flag indicating whether shortwave channel noise equivalent radiance is
    acceptable in sky view (true/false). Determined using SWskyNEN and
    SWskyNENlimit.(SWskyNENacceptable)
  • Sky View Imaginary Radiance (2295_2300 cm^-1)(skyViewImaginaryRadiance2295_2300)
  • Scene mirror motor case temperature(mirrorMotorTemp)
  • The noise equivalent radiance observed in the shortwave channel during a sky
    view at 2500 cm^-1(SWskyNEN)
  • Two minute noise estimate factor(twoMinuteNoiseEstimateFactor)
  • 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)
  • Decimal representation of percentage weighting of hot blackbody apex temperature(HBBapexTempWeight)
  • ABB View Radiance Std Deviation (2282_2287 cm^-1)(ABBviewStdDevRadiance2282_2287)
  • Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
  • Size of buffer holding initial spectrum(originalInterferogramSize)
  • Expanded Spectral Buffer Size(expandedInterferogramSize)
  • Front End Fan Airflow Unheated Temperature(frontEndFanAirUnheatedTemp)
  • Relative humidity measured near Blackbodies. Use with air temperature near BBs
    only.(atmosphericRelativeHumidity)
  • Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
  • Longwave scene NEN limit(LWskyNENlimit)
  • Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
  • AERI interferometer temperature at second port(interferometerSecondPortTemp)
  • Blackbody controller unit 1 power supply temperature(BBcontroller1temp)
  • HBB view radiance standard deviation (985_990 cm^-1)(HBBviewStdDevRadiance985_990)
  • Duration of scene view(sceneViewDuration)
  • Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
  • Shortwave elevated air brightness temperature from radiance average (2282_2287
    cm-1)(elevatedLayerAirTemp2282_2287)
  • Rain sensor analog output(rainSensorIntensity)
  • Scene mirror view angle in non-negative degrees, measured clockwise from nadir
    looking into interferometer window(sceneMirrorAngle)
  • Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
  • Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
  • Ambient air temperature near the interferometer(airNearInterferometerTemp)
  • Hot blackbody temperature - rim bottom(HBBbottomTemp)
  • Ambient blackbody temperature - apex(ABBapexTemp)
  • Front End Fan Airflow Heated Temperature(frontEndFanAirHeatedTemp)
  • Sky View Imaginary Radiance (700_705 cm^-1)(skyViewImaginaryRadiance700_705)
  • HBB view radiance standard deviation (675_680 cm^-1)(HBBviewStdDevRadiance675_680)
  • Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
  • Ambient air temperature near blackbodies(airNearBBsTemp)
more
nsaaerisummaryC1.b1:
  • Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
  • Longwave elevated air brightness temperature from radiance average (700_705
    cm-1)(elevatedLayerAirTemp700_705)
  • Characteristic value representing overall longwave channel responsivity(LWresponsivity)
  • Logical flag indicating whether longwave channel noise equivalent radiance is
    acceptable in sky view (true/false). Determined using LWskyNEN and
    LWskyNENlimit.(LWskyNENacceptable)
  • AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
  • AERI LW responsivity spectral averages (ch1)(ResponsivitySpectralAveragesCh1)
  • Boolean with negative error conditions: 1:Open 0:Closed -1:Fault -2:Outside
    Valid Range -3:Neither Open Nor Closed(hatchOpen)
  • Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
  • Scene mirror view angle in non-negative degrees, measured clockwise from nadir
    looking into interferometer window(sceneMirrorAngle)
  • Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
  • Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
  • Ambient temperature used in calibration(calibrationAmbientTemp)
  • 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)
  • AERI SW scene radiance spectral averages (ch2)(SkyRadianceSpectralAveragesCh2)
  • AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
  • Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
  • Cold blackbody temperature used in calibration(calibrationCBBtemp)
  • Front end fan air temperature difference(frontEndFanAirTempDiff)
  • Averaged wave number for SW scene radiance spectral averages (ch2)(wnumsum12)
  • Wave number in reciprocal centimeters(wnumsum11)
  • Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
  • Averaged wave number for SW scene brightness temp spectral averages (ch2)(wnumsum14)
  • Averaged Wave number in inverse centimeters(wnumsum13)
  • Longwave radiance average (700_705 cm^-1) elevated air(elevatedLayerRadiance700_705)
  • The noise equivalent radiance observed in the longwave channel during a sky view
    at 1000 cm-1(LWskyNEN)
  • Sun sensor intensity(sunSensorIntensity)
  • AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
  • AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
  • Observation atmospheric pressure in AERI electronics(atmosphericPressure)
  • Longwave HBB noise-equivalent radiance(LW_HBB_NEN)
  • Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
  • Shortwave HBB Noise-equivalent Radiance(SW_HBB_NEN)
  • Averaged wave number for SW HBB 2min NESR estimate number 2 (ch2)(wnumsum10)
  • AERI LW scene brightness temp spectral averages (ch1)(SkyBrightnessTempSpectralAveragesCh1)
  • AERI SW scene brightness temp spectral averages (ch2)(SkyBrightnessTempSpectralAveragesCh2)
  • Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
  • AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
  • AERI LW scene NESR spectral averages (ch1)(SkyNENCh1)
  • Duration of scene view(sceneViewDuration)
  • The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
    centered on the scene view(HBBtempDrift)
  • Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
  • Averaged Wave number in inverse centimeters(wnumsum8)
  • Averaged Wave number in inverse centimeters(wnumsum9)
  • Averaged wave number for SW scene NESR spectral averages (ch2)(wnumsum6)
  • Averaged wave number for LW HBB 2min NESR estimate number 1 (ch1)(wnumsum7)
  • Averaged Wave number in inverse centimeters(wnumsum4)
  • Wave number in reciprocal centimeters(wnumsum5)
  • Averaged wave number for SW responsivity spectral averages(wnumsum2)
  • Averaged Wave number in inverse centimeters(wnumsum3)
  • Averaged wave number for LW responsivity spectral averages(wnumsum1)
  • Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
  • Logical flag indicating whether shortwave channel noise equivalent radiance is
    acceptable in sky view (true/false). Determined using SWskyNEN and
    SWskyNENlimit.(SWskyNENacceptable)
  • Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
  • 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)
  • AERI SW HBB 2min NESR estimate #2 derived from sequential HBB views (ch2)(HBB2minNENestimateNo2Ch2)
  • AERI LW HBB 2min NESR estimate #2 derived from sequential HBB views (ch1)(HBB2minNENestimateNo2Ch1)
  • Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
  • The noise equivalent radiance observed in the shortwave channel during a sky
    view at 2500 cm^-1(SWskyNEN)
  • Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
  • Rain sensor analog output(rainSensorIntensity)
  • Relative humidity measured near Blackbodies. Use with air temperature near BBs
    only.(atmosphericRelativeHumidity)
  • Maximum temperature difference between ABB thermistors(ABBmaxTempDiff)
  • 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)
  • Shortwave surface air brightness temperature from radiance average (2295_2300
    cm-1)(surfaceLayerAirTemp2295_2300)
  • Hot blackbody temperature used in calibration(calibrationHBBtemp)
  • Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
  • Difference between actual and ideal motor encoder values for current view
    indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
  • AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
  • Shortwave radiance average (2282_2287 cm^-1) elevated air(elevatedLayerRadiance2282_2287)
  • Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
  • Ambient air temperature at hatch opening(outsideAirTemp)
  • AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
more
nsaaerich2C1.b1:
  • Mean of radiance spectra ensemble(mean_rad)
  • AERI instrument unit serial number(AERIunitNumber)
  • Scene mirror view angle in non-negative degrees, measured clockwise from nadir
    looking into interferometer window(sceneMirrorAngle)
  • Difference between the sky view\'s radiance variance and the hot black body
    view\'s variance(standard_dev_mean_rad)
  • Cold blackbody temperature used in calibration(calibrationCBBtemp)
  • Ambient air temperature at hatch opening(outsideAirTemp)
  • wavenumbers for mean radiance spectra(wnum)
  • Duration of scene view(sceneViewDuration)
  • Wave number in reciprocal centimeters(wnum2)
  • Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
  • Boolean with negative error conditions: 1:Open 0:Closed -1:Fault -2:Outside
    Valid Range -3:Neither Open Nor Closed(hatchOpen)
  • BB Support Structure Temperature(BBsupportStructureTemp)
  • 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)
  • Relative humidity measured near Blackbodies. Use with air temperature near BBs
    only.(atmosphericRelativeHumidity)
  • Hot blackbody temperature used in calibration(calibrationHBBtemp)
  • Observation atmospheric pressure in AERI electronics(atmosphericPressure)
  • Ambient temperature used in calibration(calibrationAmbientTemp)
more

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