Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS Falguni...
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Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS Falguni Patadia, Rob Levy November 8, 2012 Aerosol Retreat
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Transcript of Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS Falguni...
Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS
Falguni Patadia, Rob Levy
November 8, 2012Aerosol Retreat
DERIVING MODIS GAS CORRECTION COEFFICIENTS - (for water vapor)
(Or ) ρL1Bλ = ρm
λ/ Tgasλ
MODIS GAS CORRECTION COEFFICIENTS
LBLRTM BASED GAS CORRECTION COEFFICIENTS
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 1 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
VZA =
Ln(ln
(1/T
rans
mitt
ance
(120
km
)))
Ln(AirMass_Factor*WaterVapor)
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 2 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
VZA =
Ln(ln
(1/T
rans
mitt
ance
(120
km
)))
Ln(AirMass_Factor*WaterVapor)
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 5 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
VZA =
Ln(ln
(1/T
rans
mitt
ance
(120
km
)))
Ln(AirMass_Factor*WaterVapor)
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 7 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
VZA =
Ln(ln
(1/T
rans
mitt
ance
(120
km
)))
Ln(AirMass_Factor*WaterVapor)
To Do List for Gas Corrections:
- Different atmospheres (US Standard, Mid-latitude etc)- LBLRTM for Ozone, CO2
- Same exercise for VIIRS
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 3 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 4 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
Tran
smitt
ance
(120
km
)
Wavelength (nm)
Tran
smitt
ance
(120
km
)
Water Vapor (cm)
Tran
smitt
ance
(120
km
)
Ln(AirMass_Factor*WaterVapor)
LBLRTM FOR MODIS CHANNEL 6 - ONLY H20 ; NO RAYLEIGH
Water Vapor = 0.25 cmWater Vapor = 10 cmThe Black Line Curve is the Relative Spectral Response Function for MODIS CH7
