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MEO SAR: System Concepts and Analysis

Matar, Jalal and Rodriguez Cassola, Marc and Krieger, Gerhard and Lopez Dekker, Paco and Moreira, Alberto (2019) MEO SAR: System Concepts and Analysis. IEEE Transactions on Geoscience and Remote Sensing. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2019.2945875 ISSN 0196-2892

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Abstract

Existing microwave remote sensing instruments used for Earth observation face a clear tradeoff between spatial resolution and revisit times at global scales. The typical imaging capabilities of current systems range from daily observations at kilometer-scale resolutions provided by scatterometers to meter-scale resolutions at lower temporal rates (more than ten days) typical of synthetic aperture radars (SARs). A natural way to fill the gap between these two extremes is to use medium-Earth-orbit SAR (MEO-SAR) systems. MEO satellites are deployed at altitudes above the region of low Earth orbits (LEOs), ending at around 2000 km and below the geosynchronous orbits (GEOs) near 35,786 km. MEO SAR shows a clear potential to provide advantages in terms of spatial coverage, downlink visibility, and global temporal revisit times, e.g., providing moderate resolution images (some tens of meters) at daily rates. This article discusses the design tradeoffs of MEO SAR, including sensitivity and orbit selection. The use of these higher orbits opens the door to global coverage in one- to two-day revisit or continental/oceanic coverage with multidaily observations, making MEO SAR very attractive for future scientific missions with specific interferometric and polarimetric capabilities.

Item URL in elib:https://elib.dlr.de/131324/
Document Type:Article
Title:MEO SAR: System Concepts and Analysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Matar, JalalJalal.Matar (at) dlr.dehttps://orcid.org/0000-0002-5007-3713
Rodriguez Cassola, MarcMarc.Rodriguez (at) dlr.deUNSPECIFIED
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285
Lopez Dekker, PacoFrancisco.Dekker (at) dlr.deUNSPECIFIED
Moreira, AlbertoAlberto.Moreira (at) dlr.dehttps://orcid.org/0000-0002-3436-9653
Date:2019
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1109/TGRS.2019.2945875
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Coverage, Medium-Earth-orbit (MEO) Synthetic aperture radar (SAR), orbits, SAR, space radiation, system performance
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 SAR-Expert-Support-Lab
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Matar, Jalal
Deposited On:29 Nov 2019 14:52
Last Modified:29 Nov 2019 14:52

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