NSA/AERI/C1 - Blower motor failure

The blower motor failed on February 9, estimated time 23:00 GMT. The problem was repaired 
on February 10, 23:00 GMT. The blower motor serves two functions. It maintains the 
instrument window enclosure at the outside temperature and blows ice crystals from the 
enclosure. Failure of the motor caused the enclosure temperature to increase by approximately 12K 
(from 255 to 267K). Previous experience in comparing arctic instruments with the blower 
on and off have shown that if ice crystals enter the enclosure, there is a slight 
increase in the 3-5 um (ch 2) spectral intensity. It is unlikely that Ch 1 is affected.

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

• Calculated cloud cover fraction from the WSI(cloud_cover_fract)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2)
• Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)

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

• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)

• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)

• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)

NSA/AERI/C1 - Blower Motor Failure -Channel 1 data effect

The blower motor failed on February 9, estimated time 23:00 GMT. The problem was repaired 
on February 10, 23:00 GMT. The blower motor serves two functions. It maintains the 
instrument window enclosure at the outside
temperature and blows ice crystals from the enclosure. Failure of the motor
caused the enclosure temperature to increase by approximately 12K (from 255
to 267K). Previous experience in comparing arctic instruments with the blower on and off 
have shown that if ice crystals enter the enclosure, there is a slight increase in the 3-5 
um (ch 2) spectral intensity. It is unlikely that Ch 1 is affected. However, we can not 
be certain that there is no problem with the data. Hence, this DQR should be considered a 
warning that Channel 1 data may be affected.

• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 1: [1142.20,1147.03](mean_AERI_BT_channel_1)

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

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

• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)

• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• 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)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)

NSA/AERI/C1 - Excessive Noise in C1 AERI data

Initially it was believed that the greater noise level in AERI C1 data was due to the 
extended range detector, which has lower sensitivity. However, when the S01 AERI was 
installed next to the C1 AERI and it stabilized on 9/30/2005, it was observed that the noise 
levels on the newly installed S01 AERI were much lower than for the C1 AERI. Therefore, the 
excessive noise of the C1 AERI is not due to the fundamental nature of the extended range 
detector but instead due to failure within the detector. 

The failure could be due to a poor D* value of too high a detector temperature. It could 
also be caused by optical alignment issues. In either case, the spectral radiance data 
have much more noise and that results in larger error bars when using the radiance data, 
especially long wave data as monitored by the LW_HBB_NEN flag.

On 9/30/2005, the S01 AERI, which is next to the C1 AERI, came on-line and is producing 
low noise data. The S01 data should be used instead of the C1 data where low noise 
requirements are needed.

On 6/26/2006, the S01 AERI went offline due to a laser failure.  The C1 AERI was moved to 
the connex where data were within reasonable limits for an extended range detector.  
Beginning 20060701, the C1 data are the preferred AERI data set at the NSA Barrow location.

• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)

• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)

NSA/AERI/C1 - Test data not representative of atmosphere

The AERI had high levels of noise and testing was conducted to determine the cause of the 
noise.  These tests occurred June 27 through June 30. Data collected during this time 
should not be used. It was collected to test the instrument and does not represent 
atmospheric data.

The instrument was restarted in the connex using the upgraded Windows rapid sampling 
system on June 30, 2006 beginning 17:00 GMT.

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

• 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 IR temperature ensemble(sdev_irt)
• Ensemble average of 31.4 GHz sky brightness temperature from the MWR(mean_31tbsky)
• Number of observations in each `large` MWR ensemble (23tbsky and 31tbsky)(nobs_mwr_ensembles_large)
• Cloud base height from the MPL(mean_mpl_cbh)
• altitude above sea levelaltunits(alt)
• Standard deviation of 23tbsky ensemble(sdev_23tbsky_large)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 2: [2506.20,2511.02](mean_AERI_BT_channel_2)
• Standard deviation of the average radiance in the 2510-2515 wavenumber window
  during the AERI dwell time(aeri_dwell_atm_var_channel_2)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky_large)
• Number of clear observations in ensemble(nobs_cloud3_clear)
• Number of observations in each MWR ensemble (23tbsky, 31tbsky, vap, liq)(nobs_mwr_ensembles)
• Calculated cloud cover fraction from the WSI(cloud_cover_fract)
• Standard deviation of liq ensemble(sdev_liq)
• Ensemble average of ratios of direct_norm_broadband divided by
  diffuse_hemisp_broadband from the SIROS(mean_dir_by_diff_ratio)
• Ensemble average of third cloud base height from the Belfort ceilometer(mean_cloud3_cbh)
• Serial number for the sonde used at this time.(sonde_serial_number)
• Cloud detection flag from sgpaerilblcloudsC1.c1(nonclear_flag)
• Ensemble average of total water vapor along LOS path from the MWR(mean_vap)
• Standard deviation of ratio ensemble about mean_dir_to_diff_ratio(sdev_dir_by_diff_ratio)
• Standard deviation of mpl_cbh ensemble(sdev_mpl_cbh)
• Retrieved sample time (current sample time) minus sonde launch time(sonde_offset_time)
• 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 23tbsky ensemble(sdev_23tbsky)
• Ensemble average of first cloud base height from the Belfort ceilometer(mean_cloud1_cbh)
• Data quality flag for MPL cbh ensemble(mpl_cbh_dq_flag)
• Time offset of tweaks from base_time(time_offset)
• Number of foggy observations in ensemble (probably condensation on the window)(nobs_mpl_foggy)
• Number of clear observations in ensemble(nobs_mpl_clear)
• Cloud base height estimate from the field mean_AERI_BT_channel_1(cbh_AERI_channel_1)
• Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
• IR temperature calculated from the AERI spectral response function used to
  mimick the output from the IR thermometer on the MWR(calculated_irt)
• Number of ratios in ensemble(nobs_dir_by_diff_ratio)
• north latitude for all the input platforms.(lat)
• Standard deviation of vap ensemble(sdev_vap)
• Average total liquid water along LOS path from the MWR(mean_liq)
• Binary field indicating which inputs are available and used to set the
  nonclear_flag(nonclear_inputs)
• Number of clear observations in ensemble(nobs_cloud2_clear)
• Standard deviation of cloud1 ensemble(sdev_cloud1_cbh)
• Number of cloudy observations in ensemble(nobs_mpl_cbh)
• Standard deviation of 31tbsky ensemble(sdev_31tbsky)
• Time offset from base_time(base_time)
• east longitude for all the input platforms.(lon)
• Standard deviation of cloud2 ensemble(sdev_cloud2_cbh)
• Ensemble average of second cloud base height from the Belfort ceilometer(mean_cloud2_cbh)
• Number of clear observations in ensemble(nobs_cloud1_clear)
• Standard deviation of cloud3 ensemble(sdev_cloud3_cbh)
• Average of brightness temperatures calculated from AERI radiances within
  spectral window for channel 1: [1142.20,1147.03](mean_AERI_BT_channel_1)
• Number of cloudy observations in ensemble(nobs_cloud1_cbh)
• Average IR temperature from the IRT (on the MWR)(mean_irt)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Cloud base height estimate from the field mean_AERI_BT_channel_2(cbh_AERI_channel_2)
• Number of cloudy observations in ensemble(nobs_cloud3_cbh)
• Number of cloudy observations in ensemble(nobs_cloud2_cbh)

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

• Averaged Wave number in inverse centimeters(wnumsum9)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Observation longitude(Longitude)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Averaged Wave number in inverse centimeters(wnumsum2)
• Time at center of AERI sky observation period(timeHHMMSS)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Observation latitude(Latitude)
• Julian Day including day and fraction of day(JulianDay)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Averaged Wave number in inverse centimeters(wnumsum3)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Averaged Wave number in inverse centimeters(wnumsum4)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Duration of scene view(sceneViewDuration)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset of tweaks from base_time(time_offset)
• Averaged Wave number in inverse centimeters(wnumsum8)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Time offset from base_time(base_time)
• north latitude for all the input platforms.(lat)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Averaged Wave number in inverse centimeters(wnumsum7)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Averaged Wave number in inverse centimeters(wnumsum5)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• altitude above sea levelaltunits(alt)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• AERI instrument unit serial number(AERIunitNumber)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Averaged Wave number in inverse centimeters(wnumsum6)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Observation date(dateYYMMDD)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Version number of Operational Software(systemReleaseNumber)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Averaged Wave number in inverse centimeters(wnumsum12)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Averaged Wave number in inverse centimeters(wnumsum13)
• Averaged Wave number in inverse centimeters(wnumsum14)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Averaged Wave number in inverse centimeters(wnumsum1)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Averaged Wave number in inverse centimeters(wnumsum11)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Averaged Wave number in inverse centimeters(wnumsum10)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• east longitude for all the input platforms.(lon)
• Character string containing instrument name(instrumentUnitNumber)
• Observation Altitude(Altitude)
• AERI instrument data channel number(channelNumber)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)

• altitude above sea levelaltunits(alt)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• north latitude for all the input platforms.(lat)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• 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)
• AERI instrument unit serial number(AERIunitNumber)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Observation latitude(Latitude)
• 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)
• Character string containing instrument name(instrumentUnitNumber)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Time offset of tweaks from base_time(time_offset)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Time offset from base_time(base_time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• AERI instrument data channel number(channelNumber)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Observation Altitude(Altitude)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Julian Day including day and fraction of day(JulianDay)
• Duration of scene view(sceneViewDuration)
• wavenumbers for mean radiance spectra(wnum)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Version number of Operational Software(systemReleaseNumber)
• Observation longitude(Longitude)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Observation date(dateYYMMDD)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• east longitude for all the input platforms.(lon)
• Time at center of AERI sky observation period(timeHHMMSS)

• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Observation longitude(Longitude)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• 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)
• east longitude for all the input platforms.(lon)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Hot blackbody temperature - apex(HBBapexTemp)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• Character string containing instrument name(instrumentUnitNumber)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Coadditions count Number of complete(forward+backward) interferogram scans in a
  sample average.(coadditionsCount)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Spare temperature sensor (location TBD)(spareTemp)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Time offset from base_time(base_time)
• altitude above sea levelaltunits(alt)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Detector temperature sensed via diode near detector(detectorTemp)
• Number of terms used in finite field of view correction(numberOfTerms)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Ambient blackbody temperature(ABBbottomTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Version number of Operational Software(systemReleaseNumber)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• north latitude for all the input platforms.(lat)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Time offset of tweaks from base_time(time_offset)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Observation date(dateYYMMDD)
• Observation latitude(Latitude)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Stirling cycle cooler current(coolerCurrent)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Duration of scene view(sceneViewDuration)
• Time at center of AERI sky observation period(timeHHMMSS)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Observation Altitude(Altitude)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Blackbody cavity geometry factor(BBcavityFactor)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• AERI instrument data channel number(channelNumber)
• AERI instrument unit serial number(AERIunitNumber)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Signal conditioning electronics inside air temperature(SCEtemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• AERI ingest computer temperature measured at back panel of computer(computerTemp)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Scene Mirror Position Count Number of viewers in a sequence(sceneMirPosCount)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Temperature of the AERI blackbody support structure(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)
• Scene mirror motor case temperature(mirrorMotorTemp)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)

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