1 / 12

Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS

Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS Falguni Patadia, Rob Levy November 8, 2012 Aerosol Retreat. DERIVING MODIS GAS CORRECTION COEFFICIENTS - (for water vapor). (Or ) ρ L1B λ = ρ m λ / T gas λ.

nan
Download Presentation

Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Line-by-Line Radiative Transfer Model (LBLRTM) Calculations for Gas Corrections for MODIS Falguni Patadia, Rob Levy November 8, 2012 Aerosol Retreat

  2. DERIVING MODIS GAS CORRECTION COEFFICIENTS - (for water vapor) (Or ) ρL1Bλ = ρmλ/ Tgasλ

  3. MODIS GAS CORRECTION COEFFICIENTS LBLRTM BASED GAS CORRECTION COEFFICIENTS

  4. LBLRTM FOR MODIS CHANNEL 1 - ONLY H20 ; NO RAYLEIGH Ln(ln(1/Transmittance (120 km))) Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor) Ln(AirMass_Factor*WaterVapor) VZA =

  5. LBLRTM FOR MODIS CHANNEL 2 - ONLY H20 ; NO RAYLEIGH Ln(ln(1/Transmittance (120 km))) Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor) Ln(AirMass_Factor*WaterVapor) VZA =

  6. LBLRTM FOR MODIS CHANNEL 5 - ONLY H20 ; NO RAYLEIGH Ln(ln(1/Transmittance (120 km))) Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor) Ln(AirMass_Factor*WaterVapor) VZA =

  7. LBLRTM FOR MODIS CHANNEL 7 - ONLY H20 ; NO RAYLEIGH Ln(ln(1/Transmittance (120 km))) Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor) Ln(AirMass_Factor*WaterVapor) VZA =

  8. To Do List for Gas Corrections: • Different atmospheres (US Standard, Mid-latitude etc) • LBLRTM for Ozone, CO2 • Same exercise for VIIRS

  9. LBLRTM FOR MODIS CHANNEL 3 - ONLY H20 ; NO RAYLEIGH Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor)

  10. LBLRTM FOR MODIS CHANNEL 4 - ONLY H20 ; NO RAYLEIGH Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor)

  11. LBLRTM FOR MODIS CHANNEL 6 - ONLY H20 ; NO RAYLEIGH Transmittance (120 km) Transmittance (120 km) Transmittance (120 km) Water Vapor = 0.25 cm Water Vapor = 10 cm The Black Line Curve is the Relative Spectral Response Function for MODIS CH7 Wavelength (nm) Water Vapor (cm) Ln(AirMass_Factor*WaterVapor)

More Related