Bistatic Spaceborne-Airborne Forward-looking SAR

Konferenz: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
07.06.2010 - 10.06.2010 in Aachen, Germany

Tagungsband: EUSAR 2010

Seiten: 4Sprache: EnglischTyp: PDF

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Walterscheid, Ingo; Espeter, Thomas; Klare, Jens; Brenner, Andreas (Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, 53343 Wachtberg, Germany)

This paper demonstrates and analyzes the imaging capability of a passive airborne forward-looking SAR in combination with a spaceborne illumination system. Without doubt, a forward-looking SAR system has a multitude of applications like navigation and landing assistance for aircrafts. In the past, the realization of such a system on one platform suffered from poor imaging conditions in forward direction due to left/right ambiguities and poor Doppler resolution. Using a bistatic system with a spatially separated transmitter and receiver, the image ambiguities can be avoided and the Doppler resolution can be significantly improved. To our knowledge this paper presents the worldwide first bistatic SAR experiment to demonstrate the capability and feasibility of imaging in forward direction. The radar satellite TerraSAR-X has been used as transmitter and the airborne SAR system PAMIR as receiver.