Altimeter as an Imager of the Sea Surface Roughness: Comparison of SAR and LRM Modes

Type Proceedings paper
Date 2020
Language English
Author(s) Tournadre Jean1, Chapron Bertrand1
Affiliation(s) 1 : Univ Bretagne Occidentale, CNRS, IFREMER, Lab Oceanog Phys & Spatiale,IRD, F-29280 Plouzane, France.
Meeting IEEE International Geoscience and Remote Sensing Symposium (IGARSS), ELECTR NETWORK, SEP 26-OCT 02, 2020
DOI 10.1109/IGARSS39084.2020.9323226
Keyword(s) Altimeter, high resolution surface roughness, inversion
Abstract Satellite altimeters, designed to measure the topography of the ocean, are also good imagers of the ocean surface backscatter. A method was developed to invert the classical Low Resolution Mode high resolution HR waveforms in terms of surface backscatter at high resolution (similar to 300m). Since the launch of Cryosat-2 in 2010, a new generation of altimeters using Doppler capabilities has emerged and has become the standard for the new altimeters such as the Sentinel-3 one. The so-called SAR altimetry provides higher along-track resolution and lower noise level. In this mode altimeter are also good imagers of the surface backscatter. A new method of inversion of SAR waveforms is presented. The processing of the Sentinel-3 altimeters provides collocated SAR and LRM waveforms that are used to intercompare the inverted surfce backscatter.
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Tournadre Jean, Chapron Bertrand (2020). Altimeter as an Imager of the Sea Surface Roughness: Comparison of SAR and LRM Modes. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), ELECTR NETWORK, SEP 26-OCT 02, 2020. https://archimer.ifremer.fr/doc/00719/83076/