Obstruction in the AERI-01 Enclosure

DQR No:

Subject:  Obstruction in the AERI-01 Enclosure

Date Submitted:
Submitted By:                   Robert Knuteson
 ___  Instrument Mentor
 ___  EST Member
 _X_  Science Team Member
 ___  Other _____________________________

Organization:                   University of Wisconsin - Madison
Email address:                  robert.knuteson@ssec.wisc.edu
Telephone:                      608-263-7974

Platform/Measurement:
        What level data: (raw,a0,a1,b1,c1 etc):  All levels

    What location was the data collected at:  ARM SGP CF

    Period of time in question
        Begin Date     May/ 21/ 1996    Time   22:00      (GMT)
        End Date      June/ 13/ 1996    Time   22:00      (GMT)

 Data should be labeled:
 ___  questionable
 _X_  incorrect
 ___  wrong calibration

 ___  others _______________________________

 Discussion of Problem:

The AERI Profile QME (Wayne Feltz) first detected a problem with AERI-01 data
from the SGP CF.  Investigation by site personnel on June 14, found numerous
bird droppings in the area around the AERI-01 sky hatch plus some grass lying
across a portion of the hatch opening.  Using the AERI-LBLRTM QME to analyse
the data after the fact it appears likely that nesting birds placed pieces of
grass in a position to obstruct the AERI field of view to the sky.  By some
quirk of fate, the problem actually fixed itself about 12 hours before the
site personnel made their inspection of the AERI viewport and discovered the
evidence described above. The system has been operating normally since June
13, 1996 22:00 UTC as confirmed by a recent analysis of the AERI-LBLRTM QME
results.


Other observations/measurements impacted by this problem:

This effects all QMEs and other analyses that use the AERI-01 data.


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

It is unlikely that this data can or will be corrected.

REQUIRED ACTIONS:

This report is informational no further action required____X_____

Experiment Center action required as follows:
None

Site Operations action required as follows:
None

Archive action required as follows:
None

• MFRSR channels(channel)
• AERI sample time minus Sonde release time (validation time)(sonde_offset_time)
• lon(lon)
• Logical flag indicating if the AERI sample was used to derive the surface
  temperature value for driving the model(surface_temp_from_aeri_used)
• Indicator of large residuals in channel 1 transparent region(transparent_region_dq_flag)
• base time in epoch(base_time)
• AERI radiance spectra minus LBLRTM radiance spectra(rad_difference)
• Integral of the AERI minus LBLRTM residuals for wavenumbers within each channel
  that are not saturated(integ_resid_ch_unsat)
• Wavenumber for a given sample time(wavenumber)
• Time offset from base_time(time_offset)
• Average of brightness temperatures calculated from AERI radiances within
  spectral windows, ch1:[1142.20,1147.03] & ch2:[2506.20,2511.02](mean_AERI_BT)
• -180.0 - +180.0(alt)
• North Latitude(lat)

• Ambient air temperature near blackbodies(airNearBBsTemp)
• Time at center of AERI sky observation period(timeHHMMSS)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Relative humidity measured near Blackbodies. Use with air temperature near BBs
  only.(atmosphericRelativeHumidity)
• -180.0 - +180.0(alt)
• Electronics rack ambient temperature(rackAmbientTemp)
• Time offset from base_time(time_offset)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Resistive temperature of 2500 ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Blackbody controller unit 1 power supply temperature(BBcontroller1temp)
• North Latitude(lat)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• base time in epoch(base_time)
• Time at end of interferometer data collection(rawTimeHHMMSS)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• lon(lon)
• Signal conditioning electronics inside air temperature(SCEtemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• wavenumbers for mean radiance spectra(wnum)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Blackbody controller unit 2 power supply temperature(BBcontroller2temp)
• Wave number in reciprocal centimeters(wnum2)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Scene mirror motor case temperature(mirrorMotorTemp)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Mean of radiance spectra ensemble(mean_rad)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient blackbody temperature(ABBbottomTemp)
• Stirling cycle cooler current(coolerCurrent)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Hot blackbody temperature - apex(HBBapexTemp)
• AERI instrument hatch indicator (open, closed, neither)(hatchIndicator)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Ingest computer temperature(computerTemp)
• Detector Temperature(detectorTemp)
• Spare temperature sensor (location TBD)(spareTemp)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Julian Day including day and fraction of day(JulianDay)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Time at center of AERI sky observation period(Time)
• Scene mirror position encoder value(sceneMirPosEncoder)

• -180.0 - +180.0(alt)
• North Latitude(lat)
• AERI radiance spectra minus LBLRTM radiance spectra(rad_difference)
• lon(lon)
• Indicator of large residuals in channel 1 transparent region(transparent_region_dq_flag)
• Average of brightness temperatures calculated from AERI radiances within
  spectral windows, ch1:[1142.20,1147.03] & ch2:[2506.20,2511.02](mean_AERI_BT)
• AERI sample time minus Sonde release time (validation time)(sonde_offset_time)
• Wavenumber for a given sample time(wavenumber)
• MFRSR channels(channel)
• Integral of the AERI minus LBLRTM residuals for wavenumbers within each channel
  that are not saturated(integ_resid_ch_unsat)
• Logical flag indicating if the AERI sample was used to derive the surface
  temperature value for driving the model(surface_temp_from_aeri_used)
• base time in epoch(base_time)
• Time offset from base_time(time_offset)

• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• HBB view radiance standard deviation (700_705 cm^-1)(HBBviewStdDevRadiance700_705)
• AERI LW scene NESR spectral averages (ch1)(SkyNENCh1)
• Electronics rack ambient temperature(rackAmbientTemp)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm-1)(surfaceLayerAirTemp2295_2300)
• Time at center of AERI sky observation period(Time)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
• Ambient blackbody temperature(ABBbottomTemp)
• Two minute noise estimate factor(twoMinuteNoiseEstimateFactor)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Stirling cycle cooler current(coolerCurrent)
• Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• ABB view radiance standard deviation (700_705 cm^-1)(ABBviewStdDevRadiance700_705)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Time offset from base_time(time_offset)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• AERI SW scene brightness temp spectral averages (ch2)(SkyBrightnessTempSpectralAveragesCh2)
• AERI LW scene brightness temp spectral averages (ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Averaged Wave number in inverse centimeters(wnumsum13)
• Averaged wave number for SW scene brightness temp spectral averages (ch2)(wnumsum14)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm-1(LWskyNEN)
• Averaged wave number for SW HBB 2min NESR estimate number 2 (ch2)(wnumsum10)
• Wave number in reciprocal centimeters(wnumsum11)
• Averaged wave number for SW scene radiance spectral averages (ch2)(wnumsum12)
• Time at center of AERI sky observation period(timeHHMMSS)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectraAveragesCh2)
• Hot blackbody temperature - apex(HBBapexTemp)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectraAveragesCh1)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
• Scene mirror position encoder value(sceneMirPosEncoder)
• ABB View Radiance Std Deviation (675_680 cm^-1)(ABBviewStdDevRadiance675_680)
• AERI LW HBB 2min NESR estimate #2 derived from sequential HBB views (ch1)(HBB2minNENEstimateNo2Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENEstimateNo2Ch2)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm-1)(elevatedLayerAirTemp700_705)
• Hot blackbody temperature - rim top(HBBtopTemp)
• HBB view radiance standard deviation (2510_2515 cm^-1)(HBBviewStdDevRadiance2510_2515)
• Time at end of interferometer data collection(rawTimeHHMMSS)
• Radiance standard deviation during sky view averaged over (700_705 cm-1)(skyViewStdDevRadiance700_705)
• Ambient blackbody temperature - apex(ABBapexTemp)
• ABB view radiance standard deviation (2510_2515 cm^-1)(ABBviewStdDevRadiance2510_2515)
• ABB View Radiance Std Deviation (2282_2287 cm^-1)(ABBviewStdDevRadiance2282_2287)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• North Latitude(lat)
• Julian Day including day and fraction of day(JulianDay)
• -180.0 - +180.0(alt)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Blackbody controller unit 1 power supply temperature(BBcontroller1temp)
• Detector Temperature(detectorTemp)
• Averaged wave number for LW responsivity spectral averages(wnumsum1)
• Relative humidity measured near Blackbodies. Use with air temperature near BBs
  only.(atmosphericRelativeHumidity)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Averaged wave number for LW HBB 2min NESR estimate number 1 (ch1)(wnumsum7)
• Averaged wave number for SW scene NESR spectral averages (ch2)(wnumsum6)
• Averaged Wave number in inverse centimeters(wnumsum9)
• Averaged Wave number in inverse centimeters(wnumsum8)
• Averaged Wave number in inverse centimeters(wnumsum3)
• Averaged wave number for SW responsivity spectral averages(wnumsum2)
• Wave number in reciprocal centimeters(wnumsum5)
• Averaged Wave number in inverse centimeters(wnumsum4)
• Boolean with negative error conditions: 1:Open 0:Closed -1:Fault -2:Outside
  Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Signal conditioning electronics inside air temperature(SCEtemp)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENEstimateNo1Ch2)
• base time in epoch(base_time)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENEstimateNo1Ch1)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Scene mirror motor case temperature(mirrorMotorTemp)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm-1)(elevatedLayerAirTemp2282_2287)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Longwave radiance average (700_705 cm^-1) elevated air(elevatedLayerRadiance700_705)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• HBB view radiance standard deviation (675_680 cm^-1)(HBBviewStdDevRadiance675_680)
• 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)
• HBB view radiance standard deviation (2282_2287 cm^-1)(HBBviewStdDevRadiance2282_2287)
• lon(lon)
• AERI instrument hatch indicator (open, closed, neither)(hatchIndicator)
• Blackbody controller unit 2 power supply temperature(BBcontroller2temp)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Ingest computer temperature(computerTemp)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Shortwave radiance average (2282_2287 cm^-1) elevated air(elevatedLayerRadiance2282_2287)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
• HBB view radiance standard deviation (985_990 cm^-1)(HBBviewStdDevRadiance985_990)
• AERI LW Scene radiance spectral averages (ch1)(SkyRadianceSpectraAveragesCh1)
• AERI SW scene radiance spectral averages (ch2)(SkyRadianceSpectraAveragesCh2)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the scene view(HBBtempDrift)
• Longwave radiance average (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• ABB View Radiance Std Deviation (2295_2300 cm^-1)(ABBviewStdDevRadiance2295_2300)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• HBB View Radiance Std Deviation (2295_2300 cm^-1)(HBBviewStdDevRadiance2295_2300)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)

• Time at end of interferometer data collection(rawTimeHHMMSS)
• Hot blackbody temperature - apex(HBBapexTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Ambient air temperature at hatch opening(outsideAirTemp)
• base time in epoch(base_time)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Julian Day including day and fraction of day(JulianDay)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• lon(lon)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Blackbody controller unit 1 power supply temperature(BBcontroller1temp)
• Stirling cycle cooler current(coolerCurrent)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Detector Temperature(detectorTemp)
• Resistive temperature of 2500 ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Time at center of AERI sky observation period(Time)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Wave number in reciprocal centimeters(wnum2)
• North Latitude(lat)
• Ingest computer temperature(computerTemp)
• Time offset from base_time(time_offset)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• -180.0 - +180.0(alt)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Time at center of AERI sky observation period(timeHHMMSS)
• Signal conditioning electronics inside air temperature(SCEtemp)
• Blackbody controller unit 2 power supply temperature(BBcontroller2temp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Scene mirror motor case temperature(mirrorMotorTemp)
• Spare temperature sensor (location TBD)(spareTemp)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Mean of radiance spectra ensemble(mean_rad)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• wavenumbers for mean radiance spectra(wnum)
• Relative humidity measured near Blackbodies. Use with air temperature near BBs
  only.(atmosphericRelativeHumidity)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• AERI instrument hatch indicator (open, closed, neither)(hatchIndicator)
• Ambient blackbody temperature(ABBbottomTemp)
• Electronics rack ambient temperature(rackAmbientTemp)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• BB Support Structure Temperature(BBsupportStructureTemp)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Ambient air temperature near blackbodies(airNearBBsTemp)

• Barometric pressure at site(rawAtmosphericPressure)
• Engineering channel 2 raw counts(engineeringChannel2counts)
• Engineering channel 1 data(engineeringChannel1data)
• Standard deviation of AERI pressure in counts(countsStdDevPressure)
• Standard deviation of AERI relative humidity in counts(countsStdDevRelativeHumidity)
• Reflected Temperature(thermistor2)
• Thermistor input channel number 3 (counting from 0) equivalent temperature(thermistor3)
• Ambient Air near BBs(thermistor0)
• Thermistor input channel number 1 (counting from 0) equivalent temperature(thermistor1)
• Time offset from base_time(time_offset)
• Thermistor input channel number 6 (counting from 0) equivalent temperature(thermistor6)
• Thermistor input channel number 7 (counting from 0) equivalent temperature(thermistor7)
• Thermistor input channel number 4 (counting from 0) equivalent temperature(thermistor4)
• ABB #1(thermistor5)
• Electronics Air(thermistor8)
• Thermistor input channel number 9 (counting from 0) equivalent temperature(thermistor9)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• lon(lon)
• Engineering channel 0 data(engineeringChannel0data)
• Engineering channel 0 raw counts(engineeringChannel0counts)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Temperature standard deviation for thermistor channel 0(tempStdDevThermistor0)
• Temperature standard deviation for thermistor channel 1(tempStdDevThermistor1)
• Temperature standard deviation for thermistor channel 8(tempStdDevThermistor8)
• -180.0 - +180.0(alt)
• Temperature standard deviation for thermistor channel 9(tempStdDevThermistor9)
• Temperature standard deviation for thermistor channel 6(tempStdDevThermistor6)
• Temperature standard deviation for thermistor channel 7(tempStdDevThermistor7)
• Temperature standard deviation for thermistor channel 4(tempStdDevThermistor4)
• Temperature standard deviation for thermistor channel 5(tempStdDevThermistor5)
• Temperature standard deviation for thermistor channel 2(tempStdDevThermistor2)
• Temperature standard deviation for thermistor channel 3(tempStdDevThermistor3)
• North Latitude(lat)
• Time at end of interferometer data collection(rawTimeHHMMSS)
• Time at center of AERI sky observation period(Time)
• Temperature standard deviation for thermistor channel 21(tempStdDevThermistor21)
• Temperature standard deviation for thermistor channel 20(tempStdDevThermistor20)
• Temperature standard deviation for thermistor channel 23(tempStdDevThermistor23)
• Spare temperature sensor (location TBD)(spareTemp)
• Temperature standard deviation for thermistor channel 22(tempStdDevThermistor22)
• Mirror position encoder value(rawMirrorPositionEncoder)
• Temperature standard deviation for thermistor channel 18(tempStdDevThermistor18)
• Temperature standard deviation for thermistor channel 17(tempStdDevThermistor17)
• Engineering channel 1 raw counts(engineeringChannel1counts)
• Temperature standard deviation for thermistor channel 19(tempStdDevThermistor19)
• Temperature standard deviation for thermistor channel 14(tempStdDevThermistor14)
• Temperature standard deviation for thermistor channel 13(tempStdDevThermistor13)
• Temperature standard deviation for thermistor channel 16(tempStdDevThermistor16)
• Temperature standard deviation for thermistor channel 15(tempStdDevThermistor15)
• Temperature standard deviation for thermistor channel 10(tempStdDevThermistor10)
• Temperature standard deviation for thermistor channel 12(tempStdDevThermistor12)
• Temperature standard deviation for thermistor channel 11(tempStdDevThermistor11)
• Thermistor input channel number 20 (counting from 0) equivalent temperature(thermistor20)
• Thermistor input channel number 21 (counting from 0) equivalent temperature(thermistor21)
• Thermistor input channel number 22 (counting from 0) equivalent temperature(thermistor22)
• Thermistor input channel number 23 (counting from 0) equivalent temperature(thermistor23)
• base time in epoch(base_time)
• Thermistor input channel number 15 (counting from 0) equivalent temperature(thermistor15)
• Thermistor input channel number 16 (counting from 0) equivalent temperature(thermistor16)
• Thermistor input channel number 17 (counting from 0) equivalent temperature(thermistor17)
• Thermistor input channel number 18 (counting from 0) equivalent temperature(thermistor18)
• Thermistor input channel number 19 (counting from 0) equivalent temperature(thermistor19)
• Hatch Closed Indicator(thermistor10)
• Thermistor input channel number 11 (counting from 0) equivalent temperature(thermistor11)
• Thermistor input channel number 12 (counting from 0) equivalent temperature(thermistor12)
• Spare #2(thermistor13)
• Thermistor input channel number 14 (counting from 0) equivalent temperature(thermistor14)
• Engineering channel 2 data(engineeringChannel2data)
• Julian Day including day and fraction of day(JulianDay)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• Relative humidity at site(rawAtmosphericRelativeHumidity)
• Time at center of AERI sky observation period(timeHHMMSS)

• Standard deviation of the IR temperature ensemble(sdev_irt)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 1: [1142.20,1147.03](mean_AERI_BT_channel_1)
• Ensemble average of total water vapor along LOS path from the MWR(mean_vap)
• Ensemble average of 31.4 GHz sky brightness temperature from the MWR(mean_31tbsky)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky_large)
• Cloud base height estimate from the field mean_AERI_BT_channel_1(cbh_AERI_channel_1)
• Ensemble average of ratios of direct_norm_broadband divided by
  diffuse_hemisp_broadband from the SIROS(mean_dir_by_diff_ratio)
• Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)
• Ensemble average of first cloud base height from the Belfort ceilometer(mean_cloud1_cbh)
• Standard deviation of cloud1 ensemble(sdev_cloud1_cbh)
• Standard deviation of liq ensemble(sdev_liq)
• Standard deviation of mpl_cbh ensemble(sdev_mpl_cbh)
• Number of cloudy observations in ensemble(nobs_cloud2_cbh)
• Cloud detection flag from sgpaerilblcloudsC1.c1(nonclear_flag)
• Number of clear observations in ensemble(nobs_cloud3_clear)
• Number of cloudy observations in ensemble(nobs_cloud3_cbh)
• Number of foggy observations in ensemble (probably condensation on the window)(nobs_mpl_foggy)
• Standard deviation of ratio ensemble about mean_dir_to_diff_ratio(sdev_dir_by_diff_ratio)
• Standard deviation of 23tbsky ensemble(sdev_23tbsky_large)
• AERI sample time minus WSI image time(wsi_offset_time)
• Ensemble average of 23.8 GHz sky brightness temperature from the MWR(mean_23tbsky)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky)
• Calculated number of clouds in WSI image(num_cloud)
• Standard deviation of vap ensemble(sdev_vap)
• base time in epoch(base_time)
• lon(lon)
• Cloud base height from the MPL(mean_mpl_cbh)
• Binary field indicating which inputs are available and used to set the
  nonclear_flag(nonclear_inputs)
• Number of clear observations in ensemble(nobs_mpl_clear)
• Time offset from base_time(time_offset)
• Number of clear observations in ensemble(nobs_cloud1_clear)
• Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
• North Latitude(lat)
• Calculated cloud cover fraction from the WSI(cloud_cover_frac)
• -180.0 - +180.0(alt)
• Number of cloudy observations in ensemble(nobs_mpl_cbh)
• Standard deviation of the average radiance in the 985-990 wavenumber window
  during the AERI dwell time(aeri_dwell_atm_var_channel_1)
• Standard deviation of the average radiance in the 2510-2515 wavenumber window
  during the AERI dwell time(aeri_dwell_atm_var_channel_2)
• Data quality flag for MPL cbh ensemble(mpl_cbh_dq_flag)
• Number of observations in each MWR ensemble (23tbsky, 31tbsky, vap, liq)(nobs_mwr_ensembles)
• Number of clear observations in ensemble(nobs_cloud2_clear)
• Number of observations in each `large` MWR ensemble (23tbsky and 31tbsky)(nobs_mwr_ensembles_large)
• Standard deviation of 23tbsky ensemble(sdev_23tbsky)
• Ensemble average of third cloud base height from the Ceilometer(mean_cloud3_cbh)
• Standard deviation of cloud3 ensemble(sdev_cloud3_cbh)
• Sonde serial number(sonde_serial_number)
• AERI sample time minus Sonde release time (validation time)(sonde_offset_time)
• Average total liquid water along LOS path from the MWR(mean_liq)
• IR temperature calculated from the AERI spectral response function used to
  mimick the output from the IR thermometer on the MWR(calculated_irt)
• Ensemble average of second cloud base height from the Belfort ceilometer(mean_cloud2_cbh)
• Standard deviation of cloud2 ensemble(sdev_cloud2_cbh)
• Average IR temperature from the IRT (on the MWR)(mean_irt)
• Number of cloudy observations in ensemble(nobs_cloud1_cbh)
• Number of ratios in ensemble(nobs_dir_by_diff_ratio)