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Generation of Highly Accurate DEMs Over Flat Areas by Means of Dual-Frequency and Dual-Baseline Airborne SAR Interferometry

Pinheiro, Muriel and Reigber, Andreas and Scheiber, Rolf and Prats, Pau and Moreira, Alberto (2018) Generation of Highly Accurate DEMs Over Flat Areas by Means of Dual-Frequency and Dual-Baseline Airborne SAR Interferometry. IEEE Transactions on Geoscience and Remote Sensing, 4361 -4390. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/tgrs.2018.2817122. ISSN 0196-2892.

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In this paper, a dual-frequency and dual-baseline (DFDB) processing framework for the extraction of high precision terrain information from airborne interferometric synthetic aperture radar (SAR) data is presented. Specifically, we propose the use of two single-pass data sets acquired simultaneously in two different frequency bands and two large baseline repeat-pass data sets also acquired simultaneously in two frequency bands. The configuration profits from the stability of the single-pass derived elevation maps in relation to spatially correlated artifacts as well as from the increased sensitivity associated with large-baseline acquisitions. Moreover, the dualfrequency nature of the data set enables the tackling of the phase unwrapping issue, promoting the retrieval of unambiguous measurements. Several algorithms for the interferometric processing of the DFDB airborne data set are proposed, including the outline of multichannel phase calibration and unwrapping error correction strategies and approaches to remove spatially correlated artifacts and extract the common underlying topography. Elevation models generated from a DFDB data set acquired with the airborne F-SAR sensor over tidal flats in northern Germany are presented, and comparisons with an airborne laser scanner reference show errors with a standard deviation of around 14 cm and a mean absolute deviation of less than 10 cm.

Item URL in elib:https://elib.dlr.de/120143/
Document Type:Article
Title:Generation of Highly Accurate DEMs Over Flat Areas by Means of Dual-Frequency and Dual-Baseline Airborne SAR Interferometry
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Pinheiro, MurielUNSPECIFIEDhttps://orcid.org/0000-0001-5770-1738UNSPECIFIED
Reigber, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-2118-5046UNSPECIFIED
Scheiber, RolfUNSPECIFIEDhttps://orcid.org/0000-0002-6833-4897UNSPECIFIED
Prats, PauUNSPECIFIEDhttps://orcid.org/0000-0002-7583-2309UNSPECIFIED
Moreira, AlbertoUNSPECIFIEDhttps://orcid.org/0000-0002-3436-9653UNSPECIFIED
Date:April 2018
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:4361 -4390
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Digital elevation model (DEM), dual frequency, repeat-pass interferometry, SAR interferometry (InSAR)
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 - Aircraft SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Muriel Aline, Pinheiro
Deposited On:27 Jun 2018 11:15
Last Modified:08 Nov 2023 14:36

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