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The Potential of Low-Frequency SAR Systems for Mapping Ionospheric TEC Distributions

Meyer, Franz Josef and Bamler, Richard and Jakowski, Norbert and Fritz, Thomas (2006) The Potential of Low-Frequency SAR Systems for Mapping Ionospheric TEC Distributions. IEEE Geoscience and Remote Sensing Letters, 3 (4), pp. 560-564. DOI: 10.1109/LGRS.2006.882148. ISSN 1545-598X.

Full text not available from this repository.

Abstract

Ionospheric propagation effects have a significant impact on the signal properties of low-frequency synthetic aperture radar (SAR) systems. Range delay, interferometric phase bias, range defocusing, and Faraday rotation are the most prominent ones. All the effects are a function of the so-called total electron content (TEC). Methods based on two-frequency global positioning system observations allow measuring TEC in the ionosphere with coarse spatial resolution only. In this letter, the potential of broadband L-band SAR systems for ionospheric TEC mapping is studied. As a basis, the dispersive nature of the ionosphere and its effects on broadband microwave radiation are theoretically derived and analyzed. It is shown that phase advance and group delay can be measured by interferometric and correlation techniques, respectively. The achievable accuracy suffices in mapping small-scale ionospheric TEC disturbances. A differential TEC estimator that separates ionospheric from tropospheric contributions is proposed.

Document Type:Article
Title:The Potential of Low-Frequency SAR Systems for Mapping Ionospheric TEC Distributions
Authors:
AuthorsInstitution or Email of Authors
Meyer, Franz JosefUNSPECIFIED
Bamler, RichardUNSPECIFIED
Jakowski, NorbertUNSPECIFIED
Fritz, ThomasUNSPECIFIED
Date:October 2006
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:3
DOI:10.1109/LGRS.2006.882148
Page Range:pp. 560-564
Editors:
EditorsEmail
IEEE Geoscience and Remote Sensing Society, UNSPECIFIED
ISSN:1545-598X
Status:Published
Keywords:Atmospheric effects, L-band SAR, SAR interferometry, correlation, dispersive media, ionosphere, synthetic aperture radar (SAR), total electron content (TEC)
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 Bildwissenschaften (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Institute of Communication and Navigation
Deposited By: Dr.-Ing. Franz Josef Meyer
Deposited On:31 Oct 2006
Last Modified:27 Apr 2009 13:12

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