| Subject: | TWP/AERI/C1 - Obstructed scene mirror mechanism (mouse) |
| DataStreams: | twpaerisummaryC1.b1, twpaerich2C1.b1, twpaeriengineerC1.b1, twpaerich1C1.b1
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| Description: | A physical obstruction caused the scene mirror to not point at the hot blackbody HBB
correctly. This lead to inaccurate sky views for the scan sequences calibrated with the
incorrect HBB views. The problem was intermittent, it often got worse as the UTC day
progressed, then reset at 0Z
Contaminated HBB scenes can potentially be identified by looking at the responsivity: a
sudden drop in responsivity is usually indicative of incorrect HBB views. HBB radiance and
mirror position could also be used from the raw data. |
| Suggestions: | Sky views adjacent to contaminated HBB scenes should be considered incorrect data. |
| Measurements: | twpaerisummaryC1.b1: - AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
- 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 Variability Spectral Averages (Ch2)(SkyUniformityCh2)
- Longwave HBB noise-equivalent radiance(LW_HBB_NEN)
- AERI LW responsivity spectral averages (ch1)(ResponsivitySpectralAveragesCh1)
- AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
- Shortwave radiance average (2282_2287 cm^-1) elevated air(elevatedLayerRadiance2282_2287)
- Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
- AERI SW scene radiance spectral averages (ch2)(SkyRadianceSpectralAveragesCh2)
- AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
- Shortwave HBB Noise-equivalent Radiance(SW_HBB_NEN)
- Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
- 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)
- AERI LW scene brightness temp spectral averages (ch1)(SkyBrightnessTempSpectralAveragesCh1)
- Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
- Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
- Radiance standard deviation during sky view averaged over (675_680 cm-1)(skyViewStdDevRadiance675_680)
- Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
- Longwave elevated air brightness temperature from radiance average (700_705
cm-1)(elevatedLayerAirTemp700_705) - Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
- AERI SW scene brightness temp spectral averages (ch2)(SkyBrightnessTempSpectralAveragesCh2)
- 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 (700_705 cm-1)(skyViewStdDevRadiance700_705)
- Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
- Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
- AERI SW HBB 2min NESR estimate #2 derived from sequential HBB views (ch2)(HBB2minNENestimateNo2Ch2)
- Radiance standard deviation during sky view averaged over (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
- AERI LW HBB 2min NESR estimate #2 derived from sequential HBB views (ch1)(HBB2minNENestimateNo2Ch1)
- The noise equivalent radiance observed in the shortwave channel during a sky
view at 2500 cm^-1(SWskyNEN) - Characteristic value representing overall longwave channel responsivity(LWresponsivity)
- Longwave radiance average (700_705 cm^-1) elevated air(elevatedLayerRadiance700_705)
- Logical flag indicating whether longwave channel noise equivalent radiance is
acceptable in sky view (true/false). Determined using LWskyNEN and
LWskyNENlimit.(LWskyNENacceptable) - Shortwave elevated air brightness temperature from radiance average (2282_2287
cm-1)(elevatedLayerAirTemp2282_2287) - AERI LW scene NESR spectral averages (ch1)(SkyNENCh1)
- AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
- AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
- AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
- Shortwave surface air brightness temperature from radiance average (2295_2300
cm-1)(surfaceLayerAirTemp2295_2300) - Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
more
twpaerich1C1.b1: - Mean of radiance spectra ensemble(mean_rad)
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twpaeriengineerC1.b1: - 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)
- 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 (675-680 cm-1) Surface Air(surfaceLayerRadiance675_680)
- Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
- Longwave elevated air brightness temperature from radiance average (700_705
cm-1)(elevatedLayerAirTemp700_705) - Sky View Imaginary Radiance (2295_2300 cm^-1)(skyViewImaginaryRadiance2295_2300)
- Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
- Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
- HBB View Radiance Std Deviation (2295_2300 cm^-1)(HBBviewStdDevRadiance2295_2300)
- Sky view imaginary radiance (2282_2287 cm^-1)(skyViewImaginaryRadiance2282_2287)
- HBB view radiance standard deviation (2510_2515 cm^-1)(HBBviewStdDevRadiance2510_2515)
- Logical flag indicating whether shortwave channel noise equivalent radiance is
acceptable in sky view (true/false). Determined using SWskyNEN and
SWskyNENlimit.(SWskyNENacceptable) - HBB view radiance standard deviation (700_705 cm^-1)(HBBviewStdDevRadiance700_705)
- Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
- Longwave HBB noise-equivalent radiance(LW_HBB_NEN)
- Shortwave surface air brightness temperature from radiance average (2295_2300
cm-1)(surfaceLayerAirTemp2295_2300) - Shortwave HBB Noise-equivalent Radiance(SW_HBB_NEN)
- HBB view radiance standard deviation (2282_2287 cm^-1)(HBBviewStdDevRadiance2282_2287)
- Sky View Imaginary Radiance (700_705 cm^-1)(skyViewImaginaryRadiance700_705)
- Sky View Imaginary Radiance (675_680 cm^-1)(skyViewImaginaryRadiance675_680)
- Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
- Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
- HBB view radiance standard deviation (985_990 cm^-1)(HBBviewStdDevRadiance985_990)
- Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
- Longwave radiance average (700_705 cm^-1) elevated air(elevatedLayerRadiance700_705)
- Shortwave window brightness temperature from radiance average (2510_2515 cm-1)(shortwaveWindowAirTemp2510_2515)
- HBB view radiance standard deviation (675_680 cm^-1)(HBBviewStdDevRadiance675_680)
- Characteristic value representing overall longwave channel responsivity(LWresponsivity)
- Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
- Longwave surface air brightness temperature from radiance average (675_680 cm-1)(surfaceLayerAirTemp675_680)
- The noise equivalent radiance observed in the longwave channel during a sky view
at 1000 cm-1(LWskyNEN) - Shortwave scene NEN limit(SWskyNENlimit)
- Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_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 (2282_2287 cm-1)(skyViewStdDevRadiance2282_2287)
more
twpaerich2C1.b1: - Mean of radiance spectra ensemble(mean_rad)
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