NDLI: Removing atmospheric effects from aviris data for surface reflectance retrievals

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Removing atmospheric effects from aviris data for surface reflectance retrievals

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zamudio, J. A. Gao, Bo-Cai Goetz, Alexander F. H.
Copyright Year	1991
Description	Analysis of high resolution imaging spectrometer data requires a thorough compensation for atmospheric absorption and scattering. A method for retrieving surface reflectances from spectral data collected by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) is being developed. In this method, the integrated water vapor amount on a pixel by pixel basis is derived from the 0.94- and 1.14-micrometer water vapor features. The water vapor, carbon dioxide (CO2), oxygen (O2) and methane (CH4) transmission spectrum in the 0.4-2.5 micrometer region is calculated. The derived water vapor value and the solar and observational geometry are used in the spectral calculation. The AVIRIS spectrum is ratioed against the transmission spectrum to obtain the surface reflectance spectrum. Major mineral absorption features near 2.2 micrometer in retrieved reflectance spectra can be identified. Different vegetation absorption characteristics are observed. At present, the method is most useful for deriving surface reflectances from AVIRIS data measured on clear days with high visibilities. Atmospheric scattering effects will be included in our spectral calculations in the near future.
File Size	423268
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20010089137
Archival Resource Key	ark:/13960/t4tj3dv05
Language	English
Publisher Date	1991-01-08
Access Restriction	Open
Subject Keyword	Meteorology And Climatology Imaging Spectrometers Atmospheric Effects Atmospheric Scattering Infrared Spectrometers Imaging Techniques Surface Properties Water Vapor Spectral Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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