Multibeam single frequency synthetic aperture radar processor fo

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

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343 9PS, 367 88, G01S 1300, G01S 1390

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active

043553117

ABSTRACT:
A single-frequency multibeam synthetic aperture radar for large swath imaging is disclosed. Each beam illuminates a separate "footprint" (i.e., range and azimuth interval). The distinct azimuth intervals for the separate beams produce a distinct Doppler frequency spectrum for each beam. After range correlation of raw data, an optical processor develops image data for the different beams by spatially separating the beams to place each beam of different Doppler frequency spectrum in a different location in the frequency plane as well as the imaging plane of the optical processor. Selection of a beam for imaging may be made in the frequency plane by adjusting the position of an aperture, or in the image plane by adjusting the position of a slit. The raw data may also be processed in digital form in an analogous manner.

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C. Wu, "A Digital System To Produce Imagery From SAR Data", Proc. of AIAA Systems Design Driven By Sensors Conference, Paper No. 79-768, Oct. 18-20, 1976.
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