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Improving Geometric Accuracy of Optical VHR Satellite Data using TerrasSAR-X Data

Reinartz, Peter and Müller, Rupert and Suri, Sahil and Schwind, Peter (2010) Improving Geometric Accuracy of Optical VHR Satellite Data using TerrasSAR-X Data. IEEE . 2010 IEEE Aerospace Conference, 6.-13. März 2010, Big Sky, USA. ISBN 978-1-4244-3888-4 ISSN 1095-323X

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The very high geometric accuracy of geocoded data of the TerraSAR-X satellite has been shown in several investigations. This precision has been reached fully automatically without any human interaction and is due to good sensor calibration, high accuracy of satellite position and the low dependency on the satellites attitude solution. High resolution optical images from space don’t show this high geometric precision and need further ground control information, which is mainly due to insufficient attitude knowledge. Therefore TerraSAR-X data can be used as “ground control” to improve the exterior orientation and thereby the geometric accuracy of orthorectified optical satellite data. The technique used is the measurement of identical points in the images, either by manual measurements or through local image matching using adapted mutual information (MI) and to estimate improvements for the exterior orientation or Rational Polynomial Coefficients (RPCs). To be able to use this intensity based method, the radar data have to be filtered before starting the matching procedure. Through adjustment calculations falsely matched points are eliminated and an optimal improvement for the attitude angles is found. The optical data are orthorectified using these improvements and the available DEM. The results are very promising and compared using conventional ground control information from maps or GPS measurements.

Item URL in elib:https://elib.dlr.de/63639/
Document Type:Conference or Workshop Item (Paper)
Title:Improving Geometric Accuracy of Optical VHR Satellite Data using TerrasSAR-X Data
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reinartz, Peterpeter.reinartz (at) dlr.deUNSPECIFIED
Müller, Rupertrupert.mueller (at) dlr.deUNSPECIFIED
Suri, Sahilsahil.suri (at) dlr.deUNSPECIFIED
Schwind, Peterpeter.schwind (at) dlr.deUNSPECIFIED
Date:March 2010
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-10
Series Name:IEEE Aerospace Conferences
Keywords:TerraSAR-X, Orthorectification, Image Matching, Data Fusion, Accuracy Analysis
Event Title:2010 IEEE Aerospace Conference
Event Location:Big Sky, USA
Event Type:international Conference
Event Dates:6.-13. März 2010
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):W - Vorhaben Photogrammetrie und Bildanalyse (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Reinartz, Prof. Dr.. Peter
Deposited On:22 Mar 2010 10:50
Last Modified:06 Mar 2013 09:23

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