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Passive calibration of the backscattering coefficient of the ENVISAT RA-2: evaluation of radiative models for sea and land

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13 Author(s)
Pierdicca, N. ; Dipt. di Ingegneria Elettronica, Univ. di Roma, Italy ; Castracane, P. ; Pulvirenti, L. ; Greco, B.
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The passive calibration of the radar altimeter consists in characterising the receiver by observing natural surfaces with known emission in the so-called noise-sensing mode. The paper focuses on the general approach undertaken to simulate the brightness temperature at the top of the atmosphere observed by the Envisat Radar Altimeter (RA-2). It is based on emissivity models for land and sea as well as atmospheric radiation models supported by a continuous flow of on-line data used as model inputs.

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Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International  (Volume:6 )

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