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First two years of TanDEM-X mission: interferometric performance overview

Martone, Michele and Rizzoli, Paola and Bräutigam, Benjamin and Krieger, Gerhard (2013) First two years of TanDEM-X mission: interferometric performance overview. Radio Science, pp. 1-11. Wiley. DOI: [10.1002/2012RS005095] ISSN 0048-6604

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Abstract

The TerraSAR-X add-on for Digital Elevation Measurement (TanDEM-X) mission comprises two nearly identical satellites: TerraSAR-X (TSX, launched in June 2007), and TanDEM-X (TDX, launched in June 2010), which form an innovative and flexible single-pass radar interferometer. The primary objective of the mission is to generate a worldwide and consistent digital elevation model (DEM) with an unprecedented accuracy. After a calibration phase of the TDX satellite, which was performed during the first 3 months after its launch, the two satellites were brought into close formation to begin the bistatic commissioning phase. Then, in December 2010, TanDEM-X started the operational global DEM acquisition in bistatic configuration. During the last 2 years, dedicated analyses on test acquisitions as well as persistent monitoring of the interferometric performance have been carried out, which are the subject of this paper. Key quantities in estimating interferometric performance such as coherence, relative height error, and phase-unwrapping indicators are investigated, showing the outstanding capabilities of TanDEM-X. Then, the main focus is shifted to those critical areas which, for various reasons, have shown unsatisfactory data quality and therefore must be reacquired with optimized imaging geometries in order to fulfill the DEM accuracy requirements. Promising results have been obtained so far, and future strategies to handle the critical data are discussed. This paper will present an overview of the interferometric performance of TanDEM-X, based on investigations performed in the first 2 years of mission operation, and will include results from the bistatic commissioning phase until the end of the first global DEM acquisition.

Item URL in elib:https://elib.dlr.de/80638/
Document Type:Article
Title:First two years of TanDEM-X mission: interferometric performance overview
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Martone, MicheleUNSPECIFIEDUNSPECIFIED
Rizzoli, PaolaUNSPECIFIEDUNSPECIFIED
Bräutigam, BenjaminUNSPECIFIEDUNSPECIFIED
Krieger, GerhardUNSPECIFIEDUNSPECIFIED
Date:17 October 2013
Journal or Publication Title:Radio Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :[10.1002/2012RS005095]
Page Range:pp. 1-11
Publisher:Wiley
ISSN:0048-6604
Status:Published
Keywords:TanDEM-X, SAR Interferometry, Coherence, Relative Height Error
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 - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Martone, Michele
Deposited On:14 Jan 2013 17:39
Last Modified:21 Sep 2019 05:05

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