This paper presents the idea of a hybrid bistatic Synthetic Aperture Radar formed by a spaceborne illumination system and a receiving-only airborne forward-looking Synthetic Aperture Radar (F-SAR). The study aims at identifying and developing new imaging techniques for avoidance, landing, and observation, able to guarantee forward-looking real-time, all-weather, day and night, high geometric and radiometric resolution images. Classic monostatic F-SAR is known to be affected by left/right ambiguity, since terrain targets situated symmetrically about the flight path have the same Doppler history. The proposed hybrid bistatic F-SAR can take advantage of the spaceborne illuminator to improve geometric resolution and avoid image ambiguities. Furthermore, the airborne receiver can be very compact and light-weight thus needing neither radar transmitting chain, nor sophisticated antenna technology. Preliminary system performance is evaluated by calculating the expected geometric resolutions, and results shows that the proposed system improve significantly the image capability of a classic forward-looking SAR.

A Hybrid Space-Airborne Forward-Looking Bistatic Synthetic Aperture Radar for global aircraft navigation

RENGA, ALFREDO;MENICHINO, FLAVIO;MOCCIA, ANTONIO;VETRELLA, SERGIO
2009

Abstract

This paper presents the idea of a hybrid bistatic Synthetic Aperture Radar formed by a spaceborne illumination system and a receiving-only airborne forward-looking Synthetic Aperture Radar (F-SAR). The study aims at identifying and developing new imaging techniques for avoidance, landing, and observation, able to guarantee forward-looking real-time, all-weather, day and night, high geometric and radiometric resolution images. Classic monostatic F-SAR is known to be affected by left/right ambiguity, since terrain targets situated symmetrically about the flight path have the same Doppler history. The proposed hybrid bistatic F-SAR can take advantage of the spaceborne illuminator to improve geometric resolution and avoid image ambiguities. Furthermore, the airborne receiver can be very compact and light-weight thus needing neither radar transmitting chain, nor sophisticated antenna technology. Preliminary system performance is evaluated by calculating the expected geometric resolutions, and results shows that the proposed system improve significantly the image capability of a classic forward-looking SAR.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/366487
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