Adaptive channel alignment for displaced phase-centre antenna and along-track interferometry: Trials results

Abstract

This paper presents results of SAR-based GMTI using the displaced phase-centre antenna (DPCA) and along-track interferometry (ATI) techniques when the channel alignment is carried out adaptively through measurement of the SAR images. Using adaptive channel alignment (ACA) removes the need for accurate antenna position information and implicitly handles any mismatch between the channels. Results are presented for DPCA and ATI detection in SAR images gathered by an experimental radar system. The use of ACA is further demonstrated on a little-known hybrid detection algorithm that combines DPCA and ATI to utilise the strengths of each technique while overcoming their weaknesses.