Broadening circular and linear SAR image and 3D volume parameters for accurate localization

Matthew Pepin

doi:10.1117/12.2612930

31 May 2022 Broadening circular and linear SAR image and 3D volume parameters for accurate localization

Matthew Pepin

Proceedings Volume 12095, Algorithms for Synthetic Aperture Radar Imagery XXIX; 1209502 (2022) https://doi.org/10.1117/12.2612930
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

Determining accurate location with Synthetic Aperture Radar (SAR) images is hindered not only by the limited resolution of the image but also by the non-rectangular nature of the process that produces the image, and the presence of multiple returns from di§erent height objects at the same range. Three dimensional SAR volume measurements can di§erentiate di§erent height scatterers but imaging methods are limited by the measurement scenario. Interpolation of images and volumes can normalize the collected data but can add inaccuracy to pixel and voxel impulse response (IPR) and localization estimates. Regions of best achievable accuracy deÖne the imaging algorithm performance envelope. Ideal localization occurs at the estimation bound of modeled point scatterers, and is also indicated by pixel and voxel size or IPR main lobe width. The performance envelope of SAR measurement scenarios, radar parameters, and imaging and estimation algorithms can reÖne system parameters of accurate localization. Use of analogous Circular and Linear SAR (CSAR and LSAR) scenarios enables joint trade-o§ of áight path along with imaging parameters. An ideal spherical construct underlies joint CSAR and LSAR, two and three dimensional SAR scenarios. This construct also ties CSAR and LSAR imaging to spherical ray-trace creation of phase history. For di§erent scenarios deÖned through a spherical model of parameters, localization performance of the imaging envelope, IPR and estimation accuracy are examined. Along with sample size and ideal chirp waveform sampling, the azimuth and elevation aperture is varied to include ideal and sub-sampling, and extension to achieve un-aliased images and volumes. Methods expanding the envelope are investigated.

Conference Presentation

Citation Download Citation

Matthew Pepin "Broadening circular and linear SAR image and 3D volume parameters for accurate localization", Proc. SPIE 12095, Algorithms for Synthetic Aperture Radar Imagery XXIX, 1209502 (31 May 2022); https://doi.org/10.1117/12.2612930

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