Circular SAR GMTI

Douglas Page; Gregory Owirka; Howard Nichols; Steven Scarborough

doi:10.1117/12.2058260

13 June 2014 Circular SAR GMTI

Douglas Page, Gregory Owirka, Howard Nichols, Steven Scarborough

Proceedings Volume 9093, Algorithms for Synthetic Aperture Radar Imagery XXI; 90930P (2014) https://doi.org/10.1117/12.2058260
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

We describe techniques for improving ground moving target indication (GMTI) performance in multi-channel synthetic aperture radar (SAR) systems. Our approach employs a combination of moving reference processing (MRP) to compensate for defocus of moving target SAR responses and space-time adaptive processing (STAP) to mitigate the effects of strong clutter interference. Using simulated moving target and clutter returns, we demonstrate focusing of the target return using MRP, and discuss the effect of MRP on the clutter response. We also describe formation of adaptive degrees of freedom (DOFs) for STAP filtering of MRP processed data. For the simulated moving target in clutter example, we demonstrate improvement in the signal to interference plus noise (SINR) loss compared to more standard algorithm configurations. In addition to MRP and STAP, the use of tracker feedback, false alarm mitigation, and parameter estimation techniques are also described. A change detection approach for reducing false alarms from clutter discretes is outlined, and processing of a measured data coherent processing interval (CPI) from a continuously orbiting platform is described. The results demonstrate detection and geolocation of a high-value target under track. The endoclutter target is not clearly visible in single-channel SAR chips centered on the GMTI track prediction. Detections are compared to truth data before and after geolocation using measured angle of arrival (AOA).

Citation Download Citation

Douglas Page, Gregory Owirka, Howard Nichols, and Steven Scarborough "Circular SAR GMTI", Proc. SPIE 9093, Algorithms for Synthetic Aperture Radar Imagery XXI, 90930P (13 June 2014); https://doi.org/10.1117/12.2058260

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available