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Assessing the Impact of Positioning Errors in Car-Borne Repeat-Pass SAR Interferometry With a Controlled Rail-Based Experiment

Coscione, Roberto und Hajnsek, Irena und Werner, Charles und Frey, Othmar (2022) Assessing the Impact of Positioning Errors in Car-Borne Repeat-Pass SAR Interferometry With a Controlled Rail-Based Experiment. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 15, Seiten 8402-8415. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/JSTARS.2022.3193053. ISSN 1939-1404.

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Kurzfassung

Agile synthetic aperture radar (SAR) platforms such as car-borne and UAV-borne SAR systems require combined inertial navigation systems (INS) and global navigation satellite systems (GNSS) to measure the radar sensor trajectories used for focusing and interferometric processing. Measurement inaccuracies from INS/GNSS systems lead to residual phase errors in the SAR products whose minimization is crucial to derive accurate topographic and deformation information. In this work, we analyze the impact of residual positioning errors on car-borne repeat-pass SAR interferometry at L-band for different INS/GNSS measurement configurations and for the typical car-borne acquisition geometry. The positioning errors are evaluated both during single SAR acquisitions with long integration times and between different acquisitions as a function of the distance of the radar platform from the GNSS reference stations. We show the reduction of interferometric phase errors achievable by additionally using a GNSS receiver mounted in the vicinity of the SAR platform as compared to remote reference stations of the national network of permanent GNSS receivers. Test results obtained in a controlled setup with a rail-based SAR system equipped with a navigation-grade INS/GNSS system show maximum repeat-pass trajectory errors on the order of 1-2 cm using a local GNSS reference station and up to 10-15 cm using the remote reference stations, leading to azimuth and range phase trends in the interferometric products. © 2008-2012 IEEE.

elib-URL des Eintrags:https://elib.dlr.de/192221/
Dokumentart:Zeitschriftenbeitrag
Titel:Assessing the Impact of Positioning Errors in Car-Borne Repeat-Pass SAR Interferometry With a Controlled Rail-Based Experiment
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Coscione, RobertoETH ZürichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hajnsek, IrenaIrena.Hajnsek (at) dlr.dehttps://orcid.org/0000-0002-0926-3283NICHT SPEZIFIZIERT
Werner, CharlesGamma Remote Sensing AG, SwitzerlandNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Frey, OthmarETH ZurichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:25 Juli 2022
Erschienen in:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:15
DOI:10.1109/JSTARS.2022.3193053
Seitenbereich:Seiten 8402-8415
Verlag:IEEE - Institute of Electrical and Electronics Engineers
Name der Reihe:Elsevier
ISSN:1939-1404
Status:veröffentlicht
Stichwörter:Global navigation satellite system; inertial navigation; measurement errors; radar interferometry; radar remote sensing; synthetic aperture radar; terrain mapping
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Polarimetrische SAR-Interferometrie HR
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Radzuweit, Sibylle
Hinterlegt am:12 Dez 2022 17:30
Letzte Änderung:29 Feb 2024 19:02

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