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Recovering unambiguous differential ionospheric phase screens

De Zan, Francesco and Gomba, Giorgio and Saporta, Paloma and Navarro Sanchez, Victor Diego (2021) Recovering unambiguous differential ionospheric phase screens. In: Electronic Proceedings of the 13th European Conference on Synthetic Aperture Radar (EUSAR 2021), pp. 1-3. European Conference on Synthetic Aperture Radar, 29. Mar. - 01. Apr. 2021, Online. ISBN 978-3-8007-5457-1. ISSN 2197-4403.

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Abstract

Synthetic aperture radar interferograms are affected by ionospheric disturbances. The split-spectrum method exploits the peculiar propagation of the radar waves through the ionosphere and recovers a phase screen that can be used to correct the interferogram to improve the estimation of the geometrical phase. However the recovered screen is ambiguous and it is not possible to reach an absolute phase, which would enable absolute geolocation or absolute motion recovery. We propose splitting the range spectrum in three sub-bands to recover the unambiguous ionospheric difference with a linear problem; we interpret the solution of the linear system as the difference as a demodulation between an ambiguous and an unambiguous estimation of the ionosphere; and we analyse the performance of the proposed technique.

Item URL in elib:https://elib.dlr.de/142041/
Document Type:Conference or Workshop Item (Speech, Poster)
Title:Recovering unambiguous differential ionospheric phase screens
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
De Zan, Francescofrancesco.dezan (at) dlr.dehttps://orcid.org/0000-0002-1643-2559
Gomba, GiorgioGiorgio.Gomba (at) dlr.deUNSPECIFIED
Saporta, PalomaPaloma.Saporta (at) dlr.deUNSPECIFIED
Navarro Sanchez, Victor DiegoVictor.NavarroSanchez (at) dlr.deUNSPECIFIED
Date:2021
Journal or Publication Title:Electronic Proceedings of the 13th European Conference on Synthetic Aperture Radar (EUSAR 2021)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-3
ISSN:2197-4403
ISBN:978-3-8007-5457-1
Status:Published
Keywords:SAR, Ionosphere, Absolute Phase, Differential Phase, SAR Interferometry
Event Title:European Conference on Synthetic Aperture Radar
Event Location:Online
Event Type:international Conference
Event Dates:29. Mar. - 01. Apr. 2021
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - SAR methods
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Microwaves and Radar Institute > Radar Concepts
Deposited By: De Zan, Francesco
Deposited On:30 Apr 2021 09:15
Last Modified:03 May 2021 12:51

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