6533b85afe1ef96bd12b8b31

RESEARCH PRODUCT

Imation of land surface emissivity differences in the split-window channels of AVHRR

Vicente CasellesCésar CollThomas J. Schmugge

subject

BrightnessAtmospheric correctionSoil ScienceGeologyAtmospheric radiative transfer codesCoincidentBrightness temperatureEmissivityAstrophysics::Solar and Stellar AstrophysicsEnvironmental scienceSatelliteComputers in Earth SciencesSpectral resolutionPhysics::Atmospheric and Oceanic PhysicsRemote sensing

description

Abstract A method for estimating the difference between the channel emissivities in NOAA-AVHRR Channels 4 and 5 is proposed and applied to a data set from the HAPEX-MOBILHY experiment. The method is based on the separation between the atmospheric and emissivity effects in the brightness temperature difference measured with AVHRR Channels 4 and 5. Atmospheric profiles coincident to the satellite overpass and a radiative transfer model are required to estimate the atmospheric correction for brightness temperatures. With this procedure, the emissivity difference Δe is obtained at the satellite spatial and spectral resolution, which has a great interest for correcting thermal images with the split-window technique. The order of magnitude of the error related to the method proposed has been estimated by means of a sensitivity analysis to be better than 0.005.

yearjournalcountryeditionlanguage
1994-05-01Remote Sensing of Environment
https://doi.org/10.1016/0034-4257(94)90135-x