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Unexpected Height Offsets in TanDEM-X: Explanation and Correction

Krieger, Gerhard and De Zan, Francesco and Bachmann, Markus and Hueso Gonzalez, Jaime and Rodriguez Cassola, Marc and Zink, Manfred (2012) Unexpected Height Offsets in TanDEM-X: Explanation and Correction. In: Proceedings of IEEE international Geoscience and Remote Sensing Symposium (IGARSS), pp. 1-4. IEEE. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2012-07-22 - 2012-07-27, Munich, Germany.

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Abstract

This paper reports on systematic height offsets that have been observed in TanDEM-X by evaluating a large number of digital elevation model (DEM) acquisitions. Besides the expected instrument and baseline offsets, which are compensated in the calibration chain, two unexpected external error sources have been identified that apply to any formation flying bistatic SAR interferometer. The first contribution is due to relativistic effects and can be well explained within Einstein’s special theory of relativity. The second effect is due to differential delays in the troposphere. It is shown that the theoretic predictions are in good agreement with the observed offsets. All necessary corrections have in the meantime been integrated in the operational TanDEM-X processing chain.

Document Type:Conference or Workshop Item (Speech)
Additional Information:Copyright:(c) 2012 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Title:Unexpected Height Offsets in TanDEM-X: Explanation and Correction
Authors:
AuthorsInstitution or Email of Authors
Krieger, GerhardUNSPECIFIED
De Zan, FrancescoUNSPECIFIED
Bachmann, MarkusUNSPECIFIED
Hueso Gonzalez, JaimeUNSPECIFIED
Rodriguez Cassola, MarcUNSPECIFIED
Zink, ManfredUNSPECIFIED
Date:26 July 2012
Journal or Publication Title:Proceedings of IEEE international Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 1-4
Publisher:IEEE
Status:Published
Keywords:TanDEM-X, Interferoemtry, Relativity, Spacetime Interval, Differential Troposheric Delay, Calibration
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:2012-07-22 - 2012-07-27
Organizer:IEEE
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 Technologie Experimente TSX und TDX (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr.-Ing. Gerhard Krieger
Deposited On:13 Aug 2012 10:48
Last Modified:21 Mar 2014 14:55

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