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Potential Contributions of the DESDynI Mission to Ionospheric Research

Meyer, Franz and Kim, Junsu and Brcic, Ramon and Pi, Xiaoqing (2011) Potential Contributions of the DESDynI Mission to Ionospheric Research. In: Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, pp. 1-4. IEEE. IGARSS 2011, 24.-29. Juli 2011, Vancouver, Canada. ISBN 978-1-4577-1004-9.

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Official URL: http://www.cmsworldwide.com/IGARSS2011/default.asp

Abstract

Ionospheric propagation effects can have significant impact on the signal properties of low-frequency Synthetic Aperture Radar (SAR) systems. Recently, theoretical analyses of ionospheric distortions in low-frequency SAR signals have indicated a multitude of effects that are likely to affect the quality of SAR, interferometric SAR (InSAR), and polarimetric SAR (PolSAR) data [1-6]. Methods have been developed that are able to detect ionospheric effects in SAR data on a wide range of spatial scales and allow high resolution ionospheric mapping with high accuracy [3], [4], [7]. NASA’s Deformation, Ecosystem Structure and Dynamics of Ice (DESDynI) mission carries a spaceborne L-band synthetic aperture radar (SAR) with multiple polarizations to provide information on solid earth deformation, terrestrial vegetation structure, and ice dynamics. Besides providing improved performance and reliability of SAR for monitoring surface deformation, the L-band carrier frequency provides a means for mapping properties of the ionosphere with high spatial resolution and unprecedented spatial coverage. This paper describes the performance and benefits of DESDynI for ionospheric mapping. Specifically, we quantify the type, sensitivity, and accuracy of ionospheric measurements derived by a DESDynI-like system. We also analyze the achievable spatial and temporal sampling of ionospheric constituents at different areas on the globe and assess the value of the derived information for specific ionospheric research topics. After summarizing the physical origin of ionospheric signals in SAR data, Section 2 introduces several methods for extracting ionospheric information from DESDynI data. For each method, information on the measurement principle is provided and the range of extractable ionospheric parameters is determined. A first concept for an optimized ionospheric processor is shown that extends the performance of existing technology by maximizing the exploited information and increasing estimation robustness. An error analysis of the presented technology is shown in Section 3, where achievable accuracies of ionospheric measurements are analyzed for different retrieval methods. In Section 4 the benefit of SAR-based ionospheric data for ionospheric research is evaluated. In examples we examine its value for analyzing turbulent ionospheric processes in polar and equatorial regions, and for evaluating the structure of traveling ionospheric disturbances (TIDs) at various spatial scales.

Document Type:Conference or Workshop Item (Speech)
Additional Information:abstract only
Title:Potential Contributions of the DESDynI Mission to Ionospheric Research
Authors:
AuthorsInstitution or Email of Authors
Meyer, FranzUniversity of Alaska Fairbanks
Kim, JunsuDLR / HR
Brcic, RamonDLR / IMF
Pi, XiaoqingJPL
Date:July 2011
Journal or Publication Title:Proceedings of the IEEE International Geoscience and Remote Sensing Symposium
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-4
Publisher:IEEE
ISBN:978-1-4577-1004-9
Status:Published
Keywords:SAR, ionosphere, ionospheric mapping
Event Title:IGARSS 2011
Event Location:Vancouver, Canada
Event Type:international Conference
Event Dates:24.-29. Juli 2011
Organizer:IEEE
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 Informationstechnische Systeme für die Fernerkundung
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Dr. Ramon Brcic
Deposited On:05 Oct 2011 14:41
Last Modified:21 Mar 2014 10:42

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