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Investigations on the Polarimetric Behavior of a Target near the Soil

Marquart, Nicolas Pascal (2007) Investigations on the Polarimetric Behavior of a Target near the Soil. In: Proceedings of Wave Propagation in Communication, Microwave Systems and Navigation (WFMN), Seiten 104-109. ITG Information Technology within VDE. Wave Propagation in Communication, Microwave Systems and Navigation (WFMN), 2007-07-04 - 2007-07-05, Chemnitz, Germany.

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Offizielle URL: http://www.tu-chemnitz.de/etit/hf/wfmn07/

Kurzfassung

The diffraction of a plane wave by an object situated close to an interface of a two-layer medium has been investigated by many authors and an extensive literature exists on this topic. However, only a few publications have been devoted to the analysis of the polarimetric behaviour of the diffracted field. In general, very simple ray models based on the Geometrical Optic (GO) are considered involving single and double bounced waves for explaining some experimental results. Here, this problem is again investigated by using a more refined ray model based on the Geometrical Theory of Diffraction (GTD). As a result a ray system composed of 13 different rays was implemented for the monostatic case by applying the principle of Fermat. The different spatial and creeping waves give a physical insight in the mechanisms involved in the entire scattering process. Depending on the geometrical properties of the target, lit and shadow regions arise in the backscattered GTD field for a variation from perpendicular to grazing incidence for a monostatic alignment of the transmitting and receiving antenna. The separating line of such a lit and shadow region is called a Surface Shadow Boundary (SSB). A special emphasis is attributed to the transition regions near the shadow boundaries where the reflected spatial waves disappear and transform into creeping waves leading to a strong attenuation. The diffracted field for look angles related to the transition zones has a characteristic polarimetric behaviour which is represented on the Poincaré sphere. The typical locations on the sphere can be exploited in order to get information about the geometrical parameters of the target and its height above the ground.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Investigations on the Polarimetric Behavior of a Target near the Soil
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Marquart, Nicolas PascalNICHT SPEZIFIZIERT
Datum:Oktober 2007
Erschienen in:Proceedings of Wave Propagation in Communication, Microwave Systems and Navigation (WFMN)
Referierte Publikation:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 104-109
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
VDE, NICHT SPEZIFIZIERT
Verlag:ITG Information Technology within VDE
Name der Reihe:WFMN 2007 Conference Proceedings
Status:veröffentlicht
Stichwörter:Geometrical Theory of Diffraction, Uniform Theory of Diffraction, Radar polarimetry, Poincaré sphere
Veranstaltungstitel:Wave Propagation in Communication, Microwave Systems and Navigation (WFMN)
Veranstaltungsort:Chemnitz, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-07-04 - 2007-07-05
Veranstalter :Chemnitz University of Technology
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Entwicklung eines Mini-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Mikrowellen-Systeme
Institut für Hochfrequenztechnik und Radarsysteme
Hinterlegt von: Dr. Nicolas Pascal Marquart
Hinterlegt am:20 Feb 2008
Letzte Änderung:12 Dez 2013 20:25

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