A Motion Compensation Study for the Pharus Project,
ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
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In the PHARUS project, a polarimetric C-band SAR is being developed, which will be preceded by a non-polarimetric test system called PHARS. A motion compensation study is also part of preparatory studies for the final PHARUS design. A SAR data simulator has been developed as a tool for the investigation of the effects of aircraft on the SAR image. From the SAR mapping geometry, a terrain description, the radar parameters, and detailed trajectory and attitude data of a non-manoeuvring aircraft, the simulator generators raw data with a given range resolution. This can be processed, by azimuth compression, into the SAR image. A secondary purpose of the simulation is to determine the impact of several design parameter choices, and to provide well-defined test input for SAR processing software that is being developed. The results of test runs with real flight data have been verified theoretically, and have shown the need for motion compensation. It has also demonstrated a major advantage of simulation, in that it, can take many factors into account at the same time, including for instance the SAR processing method, which is hard to do theoretically.
- Active and Passive Radar Detection and Equipment