Accession Number : ADA190608

Title :   Synthetic-Aperture Radars Viewed as Interferometers with Matched Filter Processing of the Collected Data.

Descriptive Note : Final rept. Oct-Nov 86,

Corporate Author : AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

Personal Author(s) : Champagne, Edwin B

PDF Url : ADA190608

Report Date : May 1987

Pagination or Media Count : 74

Abstract : This report attempts to characterize a synthetic aperture radar in its most basic physical form and to illustrate the characteristics of various engineering approaches to the implementation of a working system. Much of the present activity in the SAR area centers on data forms, and we have illustrate that these are processing or implementation concerns and not basic radar concerns. Thus, there may be preferred ways to implement processing schemes to achieve some end, but there are probably alternatives which will achieve the same end. Perhaps this separation of the fundamentals and the engineering aspects will afford the opportunity for more approaches to be proposed and may provide a better understanding of SAR. Introductory sections are devoted to the interferometer and matched filter concepts basic to SAR. Secondary sections provide a description of traditional range azimuth formatting approaches to matched filtering, and go on to describe the polar formatting process conceived to alleviate the shortcoming of the range-azimuth format. The final sections deal with various digital and optical implementations which are being , or can be used, to perform the final reduction of polar formatted residue data. This process is basically a 2-D Fourier-Transform process. Topics covered include the Fast Fourier transform, interpolation, and back projection processing.

Descriptors :   *FAST FOURIER TRANSFORMS, *INTERFEROMETERS, *MATCHED FILTERS, *PROCESSING, *SYNTHETIC APERTURE RADAR, AZIMUTH, DATA MANAGEMENT, ENGINEERING, FORMS(PAPER), INTERPOLATION, RADAR, SECONDARY

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE