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Study on Polarisation Ratio for X-Band Using Dual-Polarisation Terra-SAR X Image

Weizeng, Shao and Lehner, Susanne and Changlong, Guan (2012) Study on Polarisation Ratio for X-Band Using Dual-Polarisation Terra-SAR X Image. In: Proceedings of IGARSS 2012 , pp. 3768-3771. IEEE Press. IGARSS 2012 , 22. -27. Juli 2012, Munich, Germany. ISBN 978-1-4673-1158-8 (e) 978-1-4673-1160-1 (p). ISSN 2153-6996 / DOI: 10.1109/IGARSS.2012.6350497.

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6350497


In this study, we present the analysis of measurements of normalized radar cross section (NRCS) and the polarisation ratio (PR) in dual-polarisation TerraSAR-X (TS-X) images. Based on two PR functions proposed for C-band SAR (denoted as the Thompson model and Elfouhaily model respectively) and the relationship between NRCS and incidence angle for X-band (it is called X-PR), three PR models are tuned using 45 dual-polarisation TS-X images. The PR is found to be dependent of the incidence angle and VV-polarisation NRCS is larger than HH-polarisation NRCS when the incidence angle is larger than 23°. A total of 20 HH-polarisation TS-X images are analyzed for retrieving the wind field using three PR models and XMOD algorithm together. The results are compared to QuikSCAT data and buoy measurements for validation. The root-mean-square error (RMSE) of wind speed is 2.34m/s, 2.16m/s and 1.99m/s with a correlation of 0.82, 0.87 and 0.88 by using Thompson model, Elfouhaily model and X-PR model respectively for the cases.

Item URL in elib:https://elib.dlr.de/79255/
Document Type:Conference or Workshop Item (Speech)
Title:Study on Polarisation Ratio for X-Band Using Dual-Polarisation Terra-SAR X Image
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Weizeng, ShaoDLR and Ocean Uni of China,ChinaUNSPECIFIED
Lehner, SusanneSusanne.Lehner (at) dlr.deUNSPECIFIED
Changlong, GuanOcean Uni of China, ChinaUNSPECIFIED
Date:10 November 2012
Journal or Publication Title:Proceedings of IGARSS 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 3768-3771
Publisher:IEEE Press
ISSN:2153-6996 / DOI: 10.1109/IGARSS.2012.6350497
ISBN:978-1-4673-1158-8 (e) 978-1-4673-1160-1 (p)
Keywords:TerraSAR-X , XMOD , polarisation ratio , wind field
Event Title:IGARSS 2012
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:22. -27. Juli 2012
Organizer:IEEE GRSS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited On:03 Dec 2012 12:59
Last Modified:08 May 2014 23:23

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