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Estimation of Ionosphere-Compensated Azimuth Ground Motion with Sentinel-1

Gomba, Giorgio (2018) Estimation of Ionosphere-Compensated Azimuth Ground Motion with Sentinel-1. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR. EUSAR 2018, 04.-07. Juni 2018, Aachen, Germany.

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Abstract

This paper deals with the mitigation of ionospheric effects in the estimation of azimuth ground motion using Sentinel-1 images. Thanks to the high accuracy of Sentinel-1 azimuth orbit timings, precise absolute measurements of azimuth ground displacements are possible, nevertheless, variations in the ionosphere electron content can introduce significant errors. Azimuth shifts are usually estimated with the Enhanced Spectral Diversity technique in the burst overlap areas. The ionospheric phase contribution can be estimated with the split-spectrum method. In this paper, the correction of ionospheric errors in azimuth shifts is realized by compensating the ionospheric phase in the burst overlap areas; this is only possible when considering the correct ionospheric height and the squint angles. The technique is thoroughly described in the paper. Experiments shows how this procedure can sensibly mitigate the ionospheric influence on azimuth shifts, improving the measurements of geophysical phenomena as, for example, earthquakes.

Item URL in elib:https://elib.dlr.de/126662/
Document Type:Conference or Workshop Item (Speech)
Title:Estimation of Ionosphere-Compensated Azimuth Ground Motion with Sentinel-1
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gomba, Giorgiogiorgio.gomba (at) dlr.deUNSPECIFIED
Date:16 August 2018
Journal or Publication Title:Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR
Refereed publication:Yes
Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:ionosphere, insar, azimuth shifts
Event Title:EUSAR 2018
Event Location:Aachen, Germany
Event Type:international Conference
Event Dates:04.-07. Juni 2018
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 Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Gomba, Giorgio
Deposited On:26 Feb 2019 12:32
Last Modified:31 Jul 2019 20:24

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