HR: 13:55h
AN: B33D-02    [Abstracts]
TI: Atmospheric corrections for land long term data records
AU: * Vermote, E
EM: eric@kratmos.gsfc.nasa.gov
AF: University of Maryland at College Park / Dept of Geography, 4321 hartwick rd., College park, MD 20742
AU: Saleous, N
AF: NASA GSFC Code 922, NASA GSFC Code 922, Greenbelt, MD 20771
AB: The gases and particles in the atmosphere affect the signal measured by Earth Observations instruments. Careful selection of spectral bands, where this effect can be minimized, has been achieved for the present and future missions (EOS or NPOES). Nevertheless, atmospheric correction should be conducted in order for surface properties to be successfully monitored by those sensors. The present work describes the atmospheric effects in the visible to middle infrared, the modeling in the radiative code 6S and the operational atmospheric corrections, as it can be conducted on the AVHRR, MODIS and VIIRS sensors. Validation of the corrections is performed on the MODIS data by using independent globally representative ground observation of aerosols (AERONET) and by comparison to surface measurements at selected sites. Comparison between AVHRR and MODIS surface reflectance product enable the transfer of validation to the AVHRR surface reflectance data record. The emphasis is put on the accuracy estimation of the derived surface reflectance for the three sensors and its impact on the interpretation of the long term trend.
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting