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Traceable Radiometric Calibration of Synthetic Aperture Radars

Döring, Björn (2016) Traceable Radiometric Calibration of Synthetic Aperture Radars. DLR-Forschungsbericht. DLR-FB-2016-13. Dissertation. Karlsruhe Institute of Technology. 200 S.

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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/108310/
Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Traceable Radiometric Calibration of Synthetic Aperture Radars
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Döring, BjörnUNSPECIFIEDhttps://orcid.org/0000-0002-4257-1413UNSPECIFIED
Date:February 2016
Refereed publication:Yes
Open Access:Yes
Number of Pages:200
Series Name:DLR Forschungsberichte
Keywords:synthetic aperture radar, calibration, definitions, transponder
Institution:Karlsruhe Institute of Technology
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 - Projekt TanDEM-X (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Döring, Björn
Deposited On:29 Nov 2016 08:48
Last Modified:31 Jul 2019 20:05

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