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Quantization Effects in TanDEM-X Data

Martone, Michele and Bräutigam, Benjamin and Krieger, Gerhard (2015) Quantization Effects in TanDEM-X Data. IEEE Transactions on Geoscience and Remote Sensing, 53 (2), pp. 583-597. DOI: 10.1109/TGRS.2014.2325976. ISSN 0196-2892.

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TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurement) is an innovative space-borne bistatic synthetic aperture radar (SAR) system comprising the twin satellites TerraSAR-X and TanDEM-X. The primary objective of the mission is the generation of a worldwide, timely, and consistent digital elevation model (DEM) in bistatic SAR configuration with an unprecedented accuracy. For TanDEM-X, as well as for future space-borne SAR missions, an increasing volume of on-board data is going to be demanded. This is due to the employment of large bandwidths, high PRFs, and multiple polarizations, which implies inevitably hard requirements in terms of on-board memory and downlink capacity. In this scenario, SAR raw data quantization represents an essential aspect. The data rate employed for the digitization of the recorded radar signal affects both the amount of data to be stored and transmitted to the ground and the quality of the resulting SAR products. In this paper, the impact of quantization on TanDEM-X monostatic and interferometric data is evaluated. Key quantities in estimating interferometric and SAR performance, like coherence and phase errors, are investigated in detail. Based on the obtained results, an optimization of the resource allocation strategy for the global DEM acquisition of TanDEM-X is discussed.

Document Type:Article
Title:Quantization Effects in TanDEM-X Data
AuthorsInstitution or Email of Authors
Martone, MicheleUNSPECIFIED
Bräutigam, BenjaminUNSPECIFIED
Krieger, GerhardUNSPECIFIED
Date:February 2015
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 583-597
Keywords:Synthetic aperture radar (SAR), SAR interferometry (InSAR), TanDEM-X mission, block adaptive quantization (BAQ).
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: Michele Martone
Deposited On:10 Dec 2013 11:07
Last Modified:16 Sep 2014 13:25

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