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Traceable Radiometric Calibration of Synthetic Aperture Radars

Döring, Björn (2016) Traceable Radiometric Calibration of Synthetic Aperture Radars. Dissertation, Karlsruher Institut für Technologie.

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Abstract

Synthetic aperture radar (SAR) systems allow to quantitatively measure the radar backscatter of an imaged terrain region. In order to achieve comparability between measurement results, traceable radiometric calibration is indispensable. The central claim of the work is that nowadays, however, radiometric SAR measurements are not traceably calibrated. In order to resolve this problem, five contributions are made: (a) The new measurement quantity “equivalent radar cross section” (ERCS) is defined. (b) A numerical approach for linking the known quantity “radar cross section” (RCS) with the novel ERCS is introduced. (c) The effect of the chosen apodization functions on radiometric measurements is analytically investigated. (d) The novel three-transponder method is developed which allows accurate RCS calibrations of SAR transponders. (e) The method of hierarchical Bayesian data analysis is introduced to the field of radiometric SAR calibration. The achieved traceability for radiometric SAR measurements allows more accurate radiometric measurement results especially for modern, high-resolution SAR systems. Furthermore, data exchange and cooperation is facilitated.

Item URL in elib:https://elib.dlr.de/108307/
Document Type:Thesis (Dissertation)
Title:Traceable Radiometric Calibration of Synthetic Aperture Radars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Döring, BjörnUNSPECIFIEDhttps://orcid.org/0000-0002-4257-1413
Date:February 2016
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:200
Status:Published
Keywords:synthetic aperture radar, calibration, transponder, definitions
Institution:Karlsruher Institut für Technologie
Department:Fakultät für Elektrotechnik und Informationstechnik
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 - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Döring, Björn
Deposited On:29 Nov 2016 08:46
Last Modified:31 Jul 2019 20:05

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