In recent papers the authors discussed the advantages of forming spotlight-mode SAR
imagery from phase history data via a technique that is rooted in the principles of phased …

In this paper we show that the technique for spotlight-mode SAR image formation generally
known as" backprojection" or" time-domain" is most easily derived and described in terms of …

A highly accurate phase error estimation algorithm can enable or enhance the performance
of many existing and emerging applications of synthetic aperture radar (SAR). In some …

General Atomics Aeronautical Systems, Inc.(GA-ASI) is designing a real-time, video-SAR
(synthetic aperture radar) mode for a test bed radar system. Typically, the flight path for video …

An approach to autofocusing for large curved synthetic aperture radar (SAR) apertures is
presented. Its essential feature is that phase corrections are being extracted not directly from …

The phase gradient autofocus (PGA) algorithm has been widely used in spotlight synthetic
aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has …

The phase-gradient autofocus (PGA) technique is robust over a wide range of imagery and
phase error functions, but the convergence usually requires four-six iterations. It is …

The Phase Gradient Autofocus algorithm (PG A) is widely used in spotlight mode SAR for
motion compensation. The PG A algorithm has been proven to be a superior autofocus …

This paper discusses the effect of motion measurement errors (MMEs) on measured bistatic
synthetic aperture radar (SAR) phase history data that has been motion compensated to the …

2 time). This collection is termed the phase history data. Since wideband modulation
techniques, such as the Linear Fre quency Modulated (LFM) chirp waveform, are normally …