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Traffic Monitoring with SAR: Implications of Target Acceleration

Baumgartner, Stefan und Gabele, Martina und Krieger, Gerhard und Bethke, Karl-Heinz und Zuev, Sergey (2006) Traffic Monitoring with SAR: Implications of Target Acceleration. In: European Conference on Synthetic Aperture Radar (EUSAR), Seiten 1-4. VDE Verlag GmbH. European Conference on Synthetic Aperture Radar (EUSAR), 2006-05-16 - 2005-05-18, Dresden, Germany. ISBN 3-8007-2960-1.

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Kurzfassung

In recent years many powerful techniques and algorithms have been developed to detect moving targets and estimate their motion parameters from single- or multi-channel SAR data. In case of single- and two-channel systems, most of the developed algorithms rely on analysis of the Doppler history. It is known that the Doppler shift relates mainly to ground moving target’s across-track velocity and the Doppler slope to moving target’s along-track velocity and across-track acceleration. In most of the existing algorithms the along-track velocity is calculated by using the estimated Doppler slope (e.g. estimated with a matched filter bank or time-frequency analysis) under the implicit assumption that the across-track acceleration is very small and therefore negligible. Since we want to monitor real and more complex traffic scenarios with a future space-based traffic monitoring system like TRAMRAD, we must know which target accelerations we have to handle in reality. For this reason a car was equipped with an inertial measurement system (IMU) and differential GPS to measure accelerations in all three dimensions during rush-hour traffic. In this paper the results of the acceleration measurements are presented and discussed. The measurement results show that a substantial part of the observed accelerations is significantly higher than 0.1 m/s<sup>2</sup>. A theoretical analysis (which is verified by detailed simulations) of the Doppler slope shows also that at such higher across-track accelerations a reliable estimation of the along-track velocity by means of a Doppler slope analysis is unemployable in practice. Finally, some basic ideas are presented which overcome this ambiguity problem and enable a reliable separation between along-track velocity and across-track acceleration.

Dokumentart:Konferenzbeitrag (Vortrag, Poster)
Titel:Traffic Monitoring with SAR: Implications of Target Acceleration
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Baumgartner, StefanNICHT SPEZIFIZIERT
Gabele, MartinaNICHT SPEZIFIZIERT
Krieger, GerhardNICHT SPEZIFIZIERT
Bethke, Karl-HeinzNICHT SPEZIFIZIERT
Zuev, SergeyNICHT SPEZIFIZIERT
Datum:Mai 2006
Erschienen in:European Conference on Synthetic Aperture Radar (EUSAR)
Referierte Publikation:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-4
Verlag:VDE Verlag GmbH
ISBN:3-8007-2960-1
Status:veröffentlicht
Stichwörter:SAR, GMTI, Moving Targets, Acceleration
Veranstaltungstitel:European Conference on Synthetic Aperture Radar (EUSAR)
Veranstaltungsort:Dresden, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-05-16 - 2005-05-18
Veranstalter :VDE
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:V SM - Sicherung der Mobilität (alt)
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V SM - Sicherung der Mobilität
DLR - Teilgebiet (Projekt, Vorhaben):V - TRAMRAD (alt)
Standort: Berlin-Adlershof , Oberpfaffenhofen
Institute & Einrichtungen:Institut für Verkehrsforschung
Institut für Hochfrequenztechnik und Radarsysteme > Mikrowellen-Systeme
Institut für Hochfrequenztechnik und Radarsysteme > Satelliten-SAR-Systeme
Hinterlegt von: Stefan Baumgartner
Hinterlegt am:26 Jun 2006
Letzte Änderung:12 Dez 2013 20:09

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