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AIRS Subset Parameter Description

L2 Standard Retrieval Product (AIRX2RET)

For more details, please refer to the AIRS File Description Guide.

Name Type

Dimensions

Brief Explanation
TSurfStd 32-bit float 45*30 Surface skin temperature in Kelvins.
TSurfAir 32-bit float 45*30 Surface air temperature in Kelvins.
TAirStd 32-bit float 45*30*28 Atmospheric temperature at StdPressLev in Kelvins. 
TAirMWOnlyStd 32-bit float 45*30*28 Atmospheric temperature retrieved using only MW information (no IR) at StdPressLev in Kelvins. 
H2OMMRStd 32-bit float 45*30*28 Water vapor mass mixing ratio (g/kg dry air).
totH2OStd 32-bit float 45*30 Total precipitable water vapor (kg/m^2).
totH2OMWOnlyStd 32-bit float 45*30 Total precipitable water vapor from MW-only retrieval (no IR information used) (kg/m^2).
O3VMRStd 32-bit float 45*30*28 Ozone volume mixing ratio.
totO3Std 32-bit float 45*30 Total ozone burden (Dobson).
emisIRStd 32-bit float 45*30*100 Spectral IR surface emissivities.
rhoIRStd   45*30*100 Spectral IR bidirectional surface reflectance, including cloud shadow effects.
sfcTbMWStd 32-bit float 45*30*7 Microwave surface brightness (Kelvins).
EmisMWStd 32-bit float 45*30*7 Spectral emissivity at the 7 MW frequencies listed for dimension MWHingeSurf (sfcTbMWStd / TSurfStd, or undefined if IR fails).
totCldH2OStd 32-bit float 45*30 Total cloud liquid water in kg/m^2.
TCldTopStd 32-bit float 45*30*2 Cloud top temperature in Kelvins.
PCldTopStd 32-bit float 45*30*2 Cloud top pressure in mb.
CldFrcStd 32-bit float 45*30*3*2 Cloud fraction (0.0,...1.0) assuming the cloud emissivity at 930 cm^-1 is unity.
GP_Height 32-bit float 45*30*28 Geopotential heights at StdPressureLev (meters above MSL).
GP_Surface 32-bit float 45*30 Geopotential heights of surface (meters above MSL).
olr 32-bit float 45*30 Outgoing longwave radiation flux integrated over 2 to 2800 cm^-1 (Watts/m^2).
clrolr 32-bit float 45*30 Clear-sky outgoing longwave radiation flux integrated over 2 to 2800 cm^-1 (Watts/m^2).
clrolr_err 32-bit float 45*30 Error estimates for clrolr (Wats/m^2).
Press_mid_top_bndry 32-bit float 45*30 Pressure level in mb, at and above which the quality of the temperature profile is given by Qual_Temp_Profile_top.  Below this level use Qual_Temp_Profile_mid.
Press_bot_mid_bndry 32-bit float 45*30 Pressure level in mb, at and below which the quality of the temperature profile is given by Qual_Temp_Profile_bot.  Above this level use Qual_Temp_Profile_mid.
Press_vaid_bottom 32-bit float 45*30 Bottom pressure at which temperature, water vapor, and ozone profiles are valid (mb).
MWSurfClass 8-bit int 45*30 Surface class from MW.
PSurfStd 32-bit float 45*30 Surface pressure first guess in mb, interpolated from forecast.
landFrac 32-bit float 45*30 Fraction of spot that is land (0.0, ..., 1.0).
landFrac_err 32-bit float 45*30 Error estimate for landFrac.
sun_glint_distance 16-bit int 45*30 Distance (km) from footprint center to location of the sun glint (-9999 for unknown, 30000 for no glint visible because spacecraft is in Earth's shadow).

- Quality Flags -

RetQAFlag 16-bit uint 45*30 Retrieval QA flags; users are advised not to use unless all bits are zero.
Qual_Surf 16-bit uint 45*30 Overall quality flag for surface fields including surface temperature, emissivity and reflectivity).
Qual_Temp_Profile_Top 16-bit unit 45*30 Quality flag for temperture profile at and above Pres_mid_top_bndry mb.
Qual_Temp_Profile_Mid 16-bit unit 45*30 Quality flag for temperature profile between Press_mid_top_bndry mb and Press_bot_mid_bndry mb.
Qual_Temp_Profile_Bot 16-bit unit 45*30 Quality flag for temperature profile below Press_bot_mid_bndry mb, including surface air temperature.
Qual_MW_Only_Temp_Strat 16-bit uint 45*30 Overall quality flag for MW-only temperature fields for altitudes above 201 mb.
Qual_MW_Only_Temp_Tropo 16-bit unit 45*30 Overall quality flag for MW-only temperature fields for altitudes at and below 201 mb, including surface temperature.
Qual_H2O 16-bit uint 45*30 Overall quality flag for water vapor fields.
Qual_MW_Only_H2O 16-bit uint 45*30 Overall quality flag for MW-only water (both wavpor and liquid) fields.
Qual_O3 16-bit uint 45*30 Quality flag for ozone.
Qual_Cloud_OLR 16-bit uint 45*30 Overall quality flag for cloud parameters, and clear and cloudy OLR.
Qual_Guess_PSurf 16-bit uint 45*30 Quality flag for surface pressure guess input.





L2 Support Product (AIRX2SUP)

For more details, please refer to the AIRS File Description Guide.

Name Type Dimensions Brief Explanation
TSurfStd 32-bit float 45*30 Surface skin temperature in Kelvins.
TSurfAir 32-bit float 45*30 Surface air temperature in Kelvins.
TAirSup 32-bit float 45*30*100 Atmospheric temperature at XtraPressLev in Kelvins.
H2OCDSup 32-bit float 45*30*100 Layer column water vapor (molecules/cm^2).
lwCDSup 32-bit float 45*30*100 Layer molecular column density (molecules/cm^2) of cloud liquid water.
cIWSup 32-bit int 45*30*100 Cloud ice/water flag.
MWseaice_conc 32-bit float 45*30 Fraction of field-of-view with frozen covering.
O3CDSup 32-bit float 45*30*100 Layer column ozone in molecules/cm^2.
COCDSup 32-bit float 45*30*100 Layer column carbon monoxide in molecules/cm^2.
CH4CDSup 32-bit float 45*30*100 Layer column methane in molecules/cm^2.
olr 32-bit float 45*30 Outgoing longwave radiation flux integrated over 2 to 2800 cm^-1 (Watts/m^2).
clrolr 32-bit float 45*30 Clear-sky outgoing longwave radiation flux integrated over 2 to 2800 cm^-1 (Watts/m^2).
CldEmis 32-bit float 45*30*2*7 Ratio of cloud IR emissivity to that at 930 cm^-1.
CldRho 32-bit float 45*30*2*7 Future cloud IR reflectivity -- do not use!
PrecipAA[4-9]_50km 8-bit uint

45*30

Relative interference of precipitation on AMSU-A channels [4-9].
PrecipAA[4-9]_15km 8-bit uint 45*30*3*3 Relative interference of precipitation on AMSU-A channels [4-9] for HSB 15-km spots.
rain_rate_50km 32-bit float 45*30 Rain rate (mm/hour).
rain_rate_15km 32-bit float 45*30*3*3 Rain rate for HSB 15-km spots (mm/hour).
Qual_Temp_Profile_Top 16-bit uint 45*30 Quality flag for temperature profile at and above Press_mid_top_bndry mb.
Qual_Temp_Profile_Mid 16-bit unit 45*30 Quality flag for temperature profile between Press_mid_top_bndry mb and Press_bot_mid_bndry mb.
Qual_Temp_Profile_Bot 16-bit uint 45*30 Quality flag for temperature profile below Press_bot_mid_bndry mb, including surface air temperature.
Qual_CO 16-bit uint 45*30 Quality flag for carbon monoxide.
CO_PPBV 32-bit float 45*30 CO volume mixing ratio, in PPB between 300 and 600 mb.
CO_PPBV_Err 32-bit float 45*30 Error estimates for CO_PPBV.
PSurfStd 32-bit float 45*30 Surface pressure first guess in mb, interpolated from NCEP model forecast.

 

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Last updated: Sep 09, 2009 02:24 PM ET
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