A KU-band SAR mission concept for ocean surface current measurement using dual beam ATI and hybrid polarization

Conference paper (2015)

Authors

Steffen Wollstadt Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Paco López-Dekker Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Francesco de Zan Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Marwan Younis Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Richard E. Danielson Nansen Environmental and Remote Sensing Center
Volker Tesmer OHB System AG
Luis Martins Camelo Dettwiler and Associates (MDA
Affiliation
External organisation
SAR ATI DBF Dual-beam interferometry Ocean current measurement Space-borne mission
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Published Date

10-11-2015

Language

English

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External organisation

Abstract

This paper presents a spaceborne SAR mission concept in Ku-band for the measurement of the two-dimensional ocean surface current. The measurement concept is based on dual-beam along-track interferometry, which requires two highly squinted antennas each looking simultaneously in fore and aft direction. A single side-looking geometry and a ScanSAR imaging mode is chosen to complete the observational concept in order to achieve the requirements on revisit-time and coverage. The applied hybrid polarization is intended to increase the information level about different ocean scattering mechanisms. Furthermore a methodology of instrument requirement derivation is briefly discussed, ensuring the ocean current measurement accuracy requirements. Finally the instrument concept, including digital beamforming, and the SAR performance are presented.