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Online Journal of Earth Sciences
Year: 2008  |  Volume: 2  |  Issue: 2  |  Page No.: 73 - 77

Influence of the Atmosphere on the Signal Measured by the Satellite

Ouafa Aissani    

Abstract: In the solar spectrum, the remote sensing from meteorological and Earth satellites is strongly affected by the atmosphere during the Sun-Earth and Earth-sensor paths, through tow processes, absorption and scattering. The atmosphere modifies the incident solar radiation and that reflected or emitted by the Earth`s surface. These effects vary relating to the place and the time; they rely on the haze and other particles in the atmosphere, the wavelength, the solar zenith angle, the position of the observer and direction relative observation. The atmospheric emissions and scattering to the sensor introduced atmospheric brightness, which includes the visible diffused part and the own emission part of the atmosphere. In this study, we have used an atmospheric model to estimate the atmospheric brightness using functions integral transmittances and studied its variations with several parameters.

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