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Airborne FM-CW SAR and Integrated Navigation System Data Fusion

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Author: Lorga, J.F.M. · Meta, A. · Wit, J.J.M. de · Mulder, J.A.
Type:article
Date:2005
Institution: TNO Defensie en Veiligheid
Source:AIAA Guidance, Navigation, and Control Conference and Exhibit, 15 - 18 August 2005, San Francisco, California, USA
Identifier: 219131
Article number: AIAA 2005-6065
Keywords: Physics

Abstract

The combination of compact FM-CW radar technology and high resolution SAR pro- cessing techniques should pave the way for the development of a small and cost e®ective imaging radar with high resolution. However, airborne SAR is a very novel application for FM-CW radars. In order to investigate the practicability of FM-CW SAR, an operational airborne demonstrator system has been developed at IRCTR. The integrated navigation system, developed at Delft University of Technology, used for the FM-CW SAR motion compensation is introduced and explained. Motion compensa- tion details, specially the squint angle correction due to the presence of lateral wind and aircraft sideslip angle, are given emphasis in this paper. Results from a °ight campaign, proving the working status of the navigation system and the radar are shown. Flight path reconstruction, using di®erent con¯gurations of the integrated navigation system, is presented. Improvements in the processed radar data due to squint angle compensation are also presented.