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A Two-Step Phase Calibration Method for Tomographic Applications with Airborne SAR Data

Pardini, Matteo and Papathanassiou, Konstantinos (2014) A Two-Step Phase Calibration Method for Tomographic Applications with Airborne SAR Data. In: Proceedings of 2014 European Conference on Synthetic Aperture Radar (EUSAR), pp. 1-4. VDE. European Conference on Synthetic Aperture Radar (EUSAR), 2014-06-03 - 2014-06-05, Berlin, Germany.

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Abstract

The extraction of accurate information from repeat-pass airborne multi-baseline (MB) synthetic aperture radar (SAR) data stacks requires a very careful phase calibration to compensate for residual baseline errors. Focusing on tomographic applications, in this paper we experiment a two-step phase calibration algorithm which is independent of the nature of scattering and can operate with an arbitrarily low number of images. In a first step, the baseline errors with respect to the master acquisition are estimated by means of a multisquint processing carried out for each single baseline with respect to the master acquisition. In a second step, the residual phase errors are compensated by means of a coherent optimization based on the minimization of the entropy of the tomographic profiles. The effectiveness of this two-step procedure is tested with MB airborne data sets acquired at different frequencies over forest and ice scenarios.

Item URL in elib:https://elib.dlr.de/93610/
Document Type:Conference or Workshop Item (Speech)
Title:A Two-Step Phase Calibration Method for Tomographic Applications with Airborne SAR Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pardini, MatteoUNSPECIFIEDUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIEDUNSPECIFIED
Date:5 June 2014
Journal or Publication Title:Proceedings of 2014 European Conference on Synthetic Aperture Radar (EUSAR)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-4
Publisher:VDE
Status:Published
Keywords:SAR, Tomography, Phase calibration, Minimum Entropy
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:2014-06-03 - 2014-06-05
Organizer:VDE
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 Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Pardini, Dr.-Ing. Matteo
Deposited On:15 Dec 2014 08:07
Last Modified:31 Jul 2019 19:50

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