NSA/SONDE/C1 - Noisy/Unstable RH and dew point data

The RH readings during the first 8 minutes of this sounding include three apparently 
incorrect oscillations to near-zero values.  After checking the absolutely raw data, it seems 
as though this period was excessively noisy, resulting in many missing values.  The noise 
abatted and the remaining sounding values are valid.

• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - Bad surface RH and temperature values

This is a subtle problem that might escape notice.  For the identified sonde launches, the 
ground station lost its signal between the time it was removed from the ground check set 
and the time it was launched.  As a result, the software, which automatically determines 
the launch time and surface conditions at time of launch mistakenly used values of 
temperature and RH representative of the ground check set and the GW rather than of the 
ambient conditions before launch.  The bad values influenced only the first few samples and the 
remainder of the sounding values are correct.  

A procedural problem was identified and corrected.

• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)
• Surface dew point temperature(dp)

SGP/AERI/E14 - Missing data

Data are missing and unrecoverable.

• Ambient temperature used in calibration(calibrationAmbientTemp)
• Character string containing instrument name(instrumentUnitNumber)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• 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 at center of AERI sky observation period(timeHHMMSS)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• 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)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• AERI instrument data channel number(channelNumber)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Observation date(dateYYMMDD)
• Time offset of tweaks from base_time(time_offset)
• altitude above sea levelaltunits(alt)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Duration of scene view(sceneViewDuration)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• north latitude for all the input platforms.(lat)
• Time offset from base_time(base_time)
• Time at center of AERI sky observation period(Time_UTC_hours)
• east longitude for all the input platforms.(lon)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Version number of Operational Software(systemReleaseNumber)
• Observation longitude(Longitude)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Observation latitude(Latitude)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• Julian Day including day and fraction of day(JulianDay)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• AERI instrument unit serial number(AERIunitNumber)
• Observation Altitude(Altitude)

• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Julian Day including day and fraction of day(JulianDay)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Character string containing instrument name(instrumentUnitNumber)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Version number of Operational Software(systemReleaseNumber)
• wavenumbers for mean radiance spectra(wnum)
• Duration of scene view(sceneViewDuration)
• east longitude for all the input platforms.(lon)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Time offset from base_time(base_time)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Observation latitude(Latitude)
• AERI instrument data channel number(channelNumber)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• north latitude for all the input platforms.(lat)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• 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)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Observation longitude(Longitude)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Time offset of tweaks from base_time(time_offset)
• Observation Altitude(Altitude)
• altitude above sea levelaltunits(alt)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• AERI instrument unit serial number(AERIunitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Observation date(dateYYMMDD)
• Time at center of AERI sky observation period(timeHHMMSS)
• Ambient air temperature at hatch opening(outsideAirTemp)

• wavenumbers for standard deviation of radiance spectra(wnum2)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Time offset from base_time(base_time)
• Time offset of tweaks from base_time(time_offset)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Observation Altitude(Altitude)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• altitude above sea levelaltunits(alt)
• Observation date(dateYYMMDD)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Julian Day including day and fraction of day(JulianDay)
• east longitude for all the input platforms.(lon)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Character string containing instrument name(instrumentUnitNumber)
• Duration of scene view(sceneViewDuration)
• north latitude for all the input platforms.(lat)
• wavenumbers for mean radiance spectra(wnum)
• Observation longitude(Longitude)
• 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)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Time at center of AERI sky observation period(timeHHMMSS)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• AERI instrument data channel number(channelNumber)

• 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 Altitude(Altitude)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Averaged Wave number in inverse centimeters(wnumsum2)
• Character string containing instrument name(instrumentUnitNumber)
• Averaged Wave number in inverse centimeters(wnumsum7)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Averaged Wave number in inverse centimeters(wnumsum8)
• Averaged Wave number in inverse centimeters(wnumsum10)
• Averaged Wave number in inverse centimeters(wnumsum3)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Observation date(dateYYMMDD)
• Averaged Wave number in inverse centimeters(wnumsum11)
• Averaged Wave number in inverse centimeters(wnumsum9)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Averaged Wave number in inverse centimeters(wnumsum4)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Averaged Wave number in inverse centimeters(wnumsum1)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• altitude above sea levelaltunits(alt)
• Time offset of tweaks from base_time(time_offset)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Julian Day including day and fraction of day(JulianDay)
• Time at center of AERI sky observation period(Time_UTC_hours)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Time offset from base_time(base_time)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• AERI instrument data channel number(channelNumber)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Averaged Wave number in inverse centimeters(wnumsum14)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• 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)
• east longitude for all the input platforms.(lon)
• Averaged Wave number in inverse centimeters(wnumsum12)
• Version number of Operational Software(systemReleaseNumber)
• Averaged Wave number in inverse centimeters(wnumsum13)
• AERI instrument unit serial number(AERIunitNumber)
• Observation latitude(Latitude)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• 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)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Duration of scene view(sceneViewDuration)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Observation longitude(Longitude)
• Time at center of AERI sky observation period(timeHHMMSS)
• Averaged Wave number in inverse centimeters(wnumsum6)
• 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)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Averaged Wave number in inverse centimeters(wnumsum5)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• north latitude for all the input platforms.(lat)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)

• 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)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• Observation longitude(Longitude)
• north latitude for all the input platforms.(lat)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Detector temperature sensed via diode near detector(detectorTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Duration of scene view(sceneViewDuration)
• altitude above sea levelaltunits(alt)
• AERI instrument data channel number(channelNumber)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• 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)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Observation Altitude(Altitude)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Stirling cycle cooler current(coolerCurrent)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• 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 (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Coadditions count Number of complete(forward+backward) interferogram scans in a
  sample average.(coadditionsCount)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Time at center of AERI sky observation period(timeHHMMSS)
• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Scene Mirror Position Count Number of viewers in a sequence(sceneMirPosCount)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Ambient blackbody temperature(ABBbottomTemp)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Julian Day including day and fraction of day(JulianDay)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Character string containing instrument name(instrumentUnitNumber)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Observation latitude(Latitude)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Spare temperature sensor (location TBD)(spareTemp)
• Signal conditioning electronics inside air temperature(SCEtemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Number of terms used in finite field of view correction(numberOfTerms)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• 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)
• Scene mirror motor case temperature(mirrorMotorTemp)
• 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)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• 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 ingest computer temperature measured at back panel of computer(computerTemp)
• Hot blackbody temperature - apex(HBBapexTemp)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• AERI instrument unit serial number(AERIunitNumber)
• Blackbody cavity geometry factor(BBcavityFactor)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Version number of Operational Software(systemReleaseNumber)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Observation date(dateYYMMDD)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Time offset from base_time(base_time)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Time offset of tweaks from base_time(time_offset)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• east longitude for all the input platforms.(lon)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)

• Observation Altitude(Altitude)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Time offset from base_time(base_time)
• Observation longitude(Longitude)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Duration of scene view(sceneViewDuration)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Observation latitude(Latitude)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• AERI instrument unit serial number(AERIunitNumber)
• AERI instrument data channel number(channelNumber)
• Observation date(dateYYMMDD)
• altitude above sea levelaltunits(alt)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• north latitude for all the input platforms.(lat)
• Version number of Operational Software(systemReleaseNumber)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Julian Day including day and fraction of day(JulianDay)
• 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)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• Time at center of AERI sky observation period(timeHHMMSS)
• Time offset of tweaks from base_time(time_offset)
• wavenumbers for mean radiance spectra(wnum)
• east longitude for all the input platforms.(lon)

NSA/SONDE/C1 - RH values offset due to error in ground check

Background: After installation of the latest software update , we began performing formal 
ground checks on RS92 radiosondes.  By comparing the radiosonde readings with reference 
values in a controlled environment, the ground check is intended to ensure that the 
radiosonde sensors are in calibration before launch.  The radisonde values during the ground 
check process are recorded automatically; the reference values are entered by the operator. 
 If the radiosonde readings vary from the reference values, the system 'corrects' the 
radiosonde values.  In the case of RH, the correction is applied as an offset (true RH = 
indicated RH + correction).

Problem: Some operators misunderstood the ground-check procedure and entered the 
radiosonde values of RH rather than the reference value (assumed 0%RH), thus, some soundings done 
during this period have RH values that are different from what they would be if the 
ground check procedure had been done correctly.

Consequence:  Because the RH corrections generally are small (averaging about 0.5% RH) and 
the precision of the reported RH data during this time period is 1% RH, some values will 
not be affected at all; others will be off by about 1% RH (still within the stated 
accuracy of the sensor).  Furthermore, because entering the radiosonde value as the reference 
value results in a near zero 'correction,' one may view these soundings as being done 
without the ground check correction.  Also note that the dew point value will be suspect as well.

I am attaching below a listing of the soundings that were affected during the indicated 
time period.  Users can see the magnitude of the problem and choose whether or not to apply 
an offset in RH.  Note that application of the offset to the processed RH data (in the 
netCDF file) will not have the same effect of applying the correction to the absolutely 
raw data (before processing), but the differences should be insignificant.  Also note that 
the corrections for each sounding are included in the netCDF header information.  These 
attributes are named 'humidity_correction' and 'humidity_correction_2'.  The values of RH 
indicated by the radiosonde while it is in the ground check set are in attributes 
'humidity_gc_sonde' and 'humidity_gc_sonde_2.'  There is an RH reading for each of the two RH 
sensors used in the RS92 radiosonde.

Here is the list - RH1 and RH2 are the radiosonde readings in the ground check set.  Ref 
is the reference value entered by the operator.  The correcte reference value should be 
0%.  To obtain an approximation to the RH value that would have been recorded if the ground 
check had been done properly, subtract the Ref value from the indicated RH.

 YYYYMMDD  HHMM  SerialNo     RH1     RH2     Ref
 20060713  0532  B1924431    0.30    0.20    0.30
 20060713  1751  B1854963    0.20    0.30    0.30
 20060714  0521  B1924425    0.40    0.40    0.40
 20060714  1739  B1854206    0.30    0.30    0.30
 20060715  0522  B1715127    1.20    1.20    1.20
 20060715  1737  B1854966    0.60    0.60    0.60
 20060716  0508  B1715126    0.40    0.40    0.40
 20060716  1732  B1844098    0.50    0.50    0.50
 20060717  0517  B1914170    0.40    0.40    0.40
 20060718  0516  B1914173    0.70    0.70    0.70
 20060720  0523  B1854149    0.40    0.40    0.40
 20060721  0517  B1914153    0.40    0.40    0.40
 20060722  0521  B1844097    1.00    1.10    1.10
 20060722  1730  B1914174    0.60    0.70    0.70
 20060723  0537  B1714439    0.40    0.40    0.40
 20060723  1734  B1734155    0.50    0.50    0.50
 20060724  0529  B1134336    0.50    0.50    0.50
 20060725  0525  B1754099    0.60    0.70    0.70
 20060726  0541  B1844108    1.80    1.80    1.80
 20060727  0520  B1714382    0.70    0.80    0.70
 20060728  0531  B1854116    0.80    0.80    0.80
 20060729  0527  B1724027    1.00    1.00    1.00
 20060729  1726  B1714392    0.70    0.80    0.80
 20060730  0522  B1854100    0.70    0.80    0.80
 20060730  1724  B1854764    0.90    1.00    1.00
 20060731  0515  B1664086    0.90    0.80    0.90
 20060801  0520  B1724758    1.50    1.50    1.50
 20060801  1729  B1754116    1.10    1.10    1.10
 20060802  0518  B1724516    0.80    0.80    0.80
 20060803  0523  B1674148    0.80    0.80    0.80
 20060804  0532  B1754092    0.90    0.90    0.90
 20060804  1727  B1844117    3.50    3.50    3.50
 20060805  0531  B1714741    0.30    0.30    0.30
 20060805  1728  B1754098    0.30    0.30    0.30
 20060806  0528  B1844115    0.40    0.40    0.40
 20060806  1728  B1914161    0.20    0.20    0.20
 20060807  0530  B1714549    0.30    0.30    0.30
 20060808  0517  B1844107    0.50    0.50    0.50
 20060808  1744  B1914166    0.20    0.20    0.20
 20060809  0527  B1914164    0.30    0.40    0.40
 20060809  1736  B1914163    0.30    0.30    0.30
 20060810  0521  B1914160    0.40    0.50    0.50
 20060810  1745  B1744671    0.40    0.40    0.40
 20060811  0525  B1854965    0.50    0.50    0.50
 20060811  1753  B1724131    0.10    0.10    0.10
 20060812  0527  B1754104    0.50    0.50    0.50
 20060812  1740  B1854256    0.30    0.40    0.40
 20060813  0522  B1854240    0.30    0.40    0.40
 20060814  0525  B1714106    0.20    0.20    0.20
 20060814  1742  B1854106    0.40    0.40    0.40
 20060815  0534  B1914169    0.50    0.60    0.60
 20060815  1734  B1854233    0.60    0.70    0.70
 20060816  0539  B1724791    0.20    0.20    0.20
 20060816  1732  B1914171    0.10    0.20    0.20
 20060817  0535  B1354283    0.10    0.10    0.10
 20060817  1740  B1354574    0.40    0.40    0.40
 20060818  0516  B1354633    0.50    0.40    0.50
 20060818  1744  B1364673    0.20    0.20    0.20
 20060819  0538  B1364126    0.20    0.30    0.30
 20060819  1745  B1354598    0.50    0.60    0.60
 20060820  0532  B1354290    1.10    1.10    1.10
 20060820  1729  B1354317    0.40    0.40    0.40
 20060821  0530  B1354545    0.60    0.70    0.70
 20060821  1728  B1354516    0.70    0.70    0.70
 20060822  0524  B1354619    0.50    0.60    0.60
 20060822  1728  B1364377    0.40    0.40    0.40
 20060823  0533  B1354309    0.30    0.30    0.30
 20060823  1730  B1354527    0.70    0.70    0.70
 20060824  0533  B1354230    0.60    0.60    0.60
 20060824  1812  B1354587    0.70    0.70    0.70
 20060825  0517  B1354614    0.70    0.70    0.70
 20060825  1730  B1354630    0.60    0.60    0.60
 20060826  0537  B1334114    0.90    0.90    0.90
 20060826  1734  B1354246    0.70    0.70    0.70
 20060827  0508  B1354534    0.70    0.70    0.70
 20060827  1729  B1354618    0.60    0.60    0.60
 20060828  0517  B1354115    0.40    0.40    0.40
 20060828  1738  B1354206    0.50    0.60    0.60
 20060829  0516  B1354617    0.50    0.60    0.60
 20060829  1717  B1354622    0.50    0.60    0.60
 20060830  0511  B1354314    0.40    0.50    0.50
 20060830  1732  B1354537    0.60    0.70    0.70
 20060831  1802  B1354239    0.60    0.80    0.80
 20060905  1724  B1354626    0.60    0.60    0.60
 20060906  0522  B1354525    0.60    0.80    0.80
 20060906  1734  B1354107    0.50    0.50    0.50
 20060907  0537  B1354543    0.70    0.70    0.70
 20060907  1803  B1354586    0.80    0.80    0.80
 20060908  0531  B1354519    0.60    0.60    0.60
 20060908  1728  B1354224    0.60    0.60    0.60
 20060909  0534  B1354532    0.70    0.80    0.80
 20060909  1732  B1354513    0.80    0.90    0.90
 20060910  0516  B1354125    0.60    0.70    0.60
 20060910  1727  B1354110    0.40    0.50    0.50
 20060911  0528  B1354235    0.90    0.90    0.90
 20060911  1849  B1354514    0.70    0.70    0.70
 20060912  0525  B1354124    0.60    0.70    0.70
 20060913  0534  B1344478    0.50    0.50    0.50
 20060914  0520  B1354226    0.70    0.70    0.70
 20060915  0529  B1344459    0.40    0.50    0.50
 20060916  0532  B1344469    0.50    0.40    0.50
 20060916  1732  B1354106    0.50    0.60    0.60
 20060917  0527  B1354210    0.70    0.70    0.70
 20060918  0533  B1354087    0.60    0.60    0.60
 20060919  0526  B1354097    0.70    0.50    0.60
 20060920  0516  B1344462    0.50    0.40    0.50
 20060920  1810  B1354536    0.70    0.70    0.70
 20060921  0534  B1354112    0.50    0.60    0.60
 20060921  1800  B1344502    0.40    0.40    0.40
 20060922  0525  B1354531    0.70    0.80    0.80
 20060922  1736  B1354541    0.70    0.70    0.70
 20060923  0519  B1354101    0.50    0.60    0.60
 20060923  1738  B1354576    0.70    0.50    0.70
 20060924  0536  B1354095    0.60    0.60    0.60
 20060925  0536  B1354098    0.60    0.60    0.60
 20060925  1755  B1354100    0.50    0.50    0.50
 20060926  0531  B1334691    0.70    0.70    0.70
 20060926  1742  B1354108    0.40    0.50    0.50

• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry

The output precision of the following variables was increased 20060929:

   alt	changed from 1m to 0.1m
   dp	changed from 0.1degC to 0.01degC
   pres changed from 0.1 hPa to 0.01 hPa
   RH	changed from 1%RH to 0.01%RH
   tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase
in accuracy.  Users are cautioned to continue to use their best scientific
judgement when using these or any other data.

• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)
• altitude above sea levelaltunits(alt)
• pressure at constant pressure surface(pres)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - Incorrect surface values of T and RH

The radiosonde was launched too quickly after being removed from the ground check set.  As 
a result, the system did not equilibrate with the local ground conditions and the 
automatically entered surface values are incorrect.

• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - RH sensor failure

It appears that one of the two RH sensors on this radiosonde was affected by ice after 
emerging from a low cold cloud.  As a result the reported RH values oscillate by about 10 
percent until the alternate heating cycle stops.  I suspect the lower value is more close 
to correct, but can't be absolutely sure.

• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - Incorrect surface RH value

For an unknown reason the surface RH was reported a 0%.  Becuase these values are entered 
automatically by the system, this is NOT likely an operator error.  Examination of the 
raw data shows that the surface RH at launch time was approximately 81.2 %RH.

• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)

NSA/SONDE/C1 - Temperature sensor broke at launch

The temperature sensor on this sonde broke at launch.  As a result all the thermodynamic 
data are incorrect.  The wind data are OK, though there will be some uncertainty in the 
altitude values.  This sounding was done at a non-standard time and it isn't clear whether 
it was delayed for some reason or a RHUBC sounding.  In either case, there is no fix.

• Ascent Rate(asc)
• Relative humidity scaled, by total column amount from MWR(rh)
• Dry-Bulb Temperature(tdry)
• altitude above sea levelaltunits(alt)
• Surface dew point temperature(dp)