Role of the Orbital Tube in Interferometric Spaceborne SAR Missions

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Role of the Orbital Tube in Interferometric Spaceborne SAR Missions

Journal Article (2015)

Author(s)

Pau Prats-Iraola (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Marc Rodriguez-Cassola (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Francesco De Zan (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Rolf Scheiber (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Paco López-Dekker (Deutsches Zentrum für Luft- und Raumfahrt (DLR))

Itziar Barat (European Space Agency (ESA))

Dirk Geudtner (European Space Agency (ESA))

University

External organisation

Synthetic aperture radar (SAR) Interferometric SAR (InSAR) Coregistration Orbital tube ScanSAR Spectral decorrelation Terrain Observation by Progressive Scans (TOPS)

DOI related publication

https://doi.org/10.1109/LGRS.2015.2409885 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:4c6223d0-1a98-47bc-9fd2-020308497498

More Info

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Publication Year

2015

Language

English

University

External organisation

Issue number

7

Volume number

12

Article number

7065218

Pages (from-to)

1486-1490

Page Views

14

Abstract

The orbit for Earth observation satellite synthetic aperture radar (SAR) missions is maintained within an Earth-fixed orbital tube to ensure ground-track coverage repeatability and, consequently, to enable repeat-pass interferometric compatibility between data takes. In this letter, it is shown that the size of the orbital tube may affect the interferometric performance in terms of azimuth spectral decorrelation and azimuth coregistration accuracy under the presence of squint. These effects require special consideration for SAR burst modes, such as ScanSAR or TOPS (i.e., Terrain Observation by Progressive Scans). This letter presents and analyzes these aspects in the frame of the Sentinel-1 mission.