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Bidirectional SAR Imaging Mode

Mittermayer, Josef and Wollstadt, Steffen and Prats, Pau and Lopez-Dekker, Paco and Krieger, Gerhard and Moreira, Alberto (2013) Bidirectional SAR Imaging Mode. IEEE Transactions on Geoscience and Remote Sensing, 51 (1), pp. 601-614. IEEE. DOI: 10.1109/TGRS.2012.2202669. ISSN 0196-2892.

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Abstract

The paper introduces the Bi-Directional (BiDi) SAR imaging mode, i.e. the simultaneous imaging of two directions by one antenna into one receiving channel, and presents short-term time series of images and interferograms acquired by the TerraSAR-X and TanDEM-X satellites. A comparison to alternative approaches for the acquisition of short-term time series is provid-ed. The BiDi acquisition geometry is defined and a TerraSAR-X bi-directional antenna pattern is analyzed. BiDi raw data are simulated, sampled with different PRF values and compared to real BiDi raw data. The spectral separation of simultaneously acquired forward and backward looking images is explained. The paper presents the image results of BiDi acquisitions with Ter-raSAR-X and TanDEM-X satellites flying with 20 km along-track separation. This pursuit configuration allowed for the acquisition of up to six short-term repeated images and up to three interferograms in a single pass. An overview of potential applications for the new bi-directional SAR imaging mode concludes the paper.

Document Type:Article
Title:Bidirectional SAR Imaging Mode
Authors:
AuthorsInstitution or Email of Authors
Mittermayer, JosefDLR HR
Wollstadt, SteffenDLR HR
Prats, PauDLR HR
Lopez-Dekker, PacoDLR HR
Krieger, GerhardDLR HR
Moreira, AlbertoDLR HR
Date:January 2013
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:51
DOI:10.1109/TGRS.2012.2202669
Page Range:pp. 601-614
Publisher:IEEE
ISSN:0196-2892
Status:Published
Keywords:Bi-directional SAR (BiDi), TerraSAR-X, TanDEM-X
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 Entwicklung eines Mini-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr.-Ing. Josef Mittermayer
Deposited On:21 Jun 2012 11:33
Last Modified:12 Dec 2013 21:41

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