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High resolution wind fields from satellite borne SAR

Horstmann, Jochen and Koch, W. and König, Thomas and Lehner, Susanne (2004) High resolution wind fields from satellite borne SAR. In: Remote Sensing of the Ocean and Sea Ice 2003, 5233, pp. 118-125. SPIE Remote Sensing Symposium, Barcelona, Spain, 8-12 September, 2003. ISBN 0-8194-5116-9.

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Abstract

An algorithm is introduced, which is designed to retrieve high-resolution wind fields from C-band synthetic aperture radars (SAR) operating at both vertical and horizontal polarization. The wind directions are extracted from wind-induced streaks, which are approximately in line with the mean wind direction near to the ocean surface. The wind speeds are derived from the normalized radar cross section (NRCS) and image geometry of the calibrated SAR images, together with the local wind direction retrieved from the image. Therefore the semi empirical C-band model CMOD4, which describes the dependency of the NRCS on wind and image geometry, is used. The CMOD4 was originally developed for the scatterometer of the European remote sensing satellites ERS-1 and 2 operating at C-band with vertical polarization. Consequently CMOD4 requires modification for horizontal polarization, which is performed by considering the polarization ratio. To verify the algorithm, wind fields were computed from the European satellites ERS-1/2 and ENVISAT SAR as well as the Canadian satellite RADARSAT-1 and compared to results from numerical models and a scatterometer.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004,
Title:High resolution wind fields from satellite borne SAR
Authors:
AuthorsInstitution or Email of Authors
Horstmann, JochenGKSS
Koch, W.UNSPECIFIED
König, ThomasUNSPECIFIED
Lehner, SusanneUNSPECIFIED
Date:2004
Journal or Publication Title:Remote Sensing of the Ocean and Sea Ice 2003
Volume:5233
Page Range:pp. 118-125
Editors:
EditorsEmail
SPIE Org., UNSPECIFIED
Series Name:Proceedings of the SPIE
ISBN:0-8194-5116-9
Status:Published
Event Title:SPIE Remote Sensing Symposium, Barcelona, Spain, 8-12 September, 2003
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Bärbel Bolowski
Deposited On:07 Feb 2006
Last Modified:06 Jan 2010 22:24

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