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Imaging Geodesy—Centimeter-Level Ranging Accuracy With TerraSAR-X: An Update

Cong, Xiaoying and Balss, Ulrich and Eineder, Michael and Fritz, Thomas (2012) Imaging Geodesy—Centimeter-Level Ranging Accuracy With TerraSAR-X: An Update. IEEE Geoscience and Remote Sensing Letters, 9 (5), pp. 948-952. IEEE. DOI: [10.1109/LGRS.2012.2187042]. ISSN 1545-598X.

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Official URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6170871&isnumber=6205680


In this letter, we report on two major improvements with respect to the results presented in our recent paper on imaging geodesy: the atmospheric delay estimation using numerical weather model data and the continental drift adjustment from different geodetic coordinate systems. First, we demonstrate that the GPS-based zenith delay estimates used in our recent paper to correct synthetic aperture radar (SAR) data can be replaced by estimates calculated from numerical weather model data. This leads to a much wider applicability of our approach and even improves the accuracy from 3.8 cm to 3.2 cm. Second, for measuring the absolute position within the SAR image, the coordinate system used has to be carefully chosen, otherwise continental drift affects the results. We show that correct consideration of the reference frames eliminates residual offsets by up to 3.1 cm.

Document Type:Article
Title:Imaging Geodesy—Centimeter-Level Ranging Accuracy With TerraSAR-X: An Update
AuthorsInstitution or Email of Authors
Cong, XiaoyingTUM-LMF
Balss, UlrichDLR-IMF
Eineder, MichaelDLR-IMF
Fritz, ThomasDLR-IMF
Date:September 2012
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 948-952
Keywords:Electromagnetic refraction , TerraSAR-X (TS-X) , geodesy , pixel localization accuracy , synthetic aperture radar (SAR) , tropospheric delay
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Xiao Ying Cong
Deposited On:12 Jul 2012 10:46
Last Modified:12 Dec 2013 21:42

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