Application of digital beamforming phase calibration techniques in multi-pass interferometric SAR for improved height mapping

Kelly Cheung; Brian Rigling

doi:10.1117/12.3004211

7 June 2024 Application of digital beamforming phase calibration techniques in multi-pass interferometric SAR for improved height mapping

Kelly Cheung, Brian Rigling

Author Affiliations +

Proceedings Volume 13032, Algorithms for Synthetic Aperture Radar Imagery XXXI; 1303202 (2024) https://doi.org/10.1117/12.3004211
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

For multi-pass interferometric synthetic aperture radar applications, phase incoherencies between data collected during successive passes cause errors in the processed results. In topological mapping, where data at several elevations are interferometrically processed to resolve a height map of the scene, phase incoherencies translate to height errors. For digital beamforming arrays, phase incoherencies result in poor beamforming. This includes high sidelobes, inaccurate steering angle, and poor spatial resolution. Therefore, to maximize sensing performance and ensure accurate measurements, it is necessary to phase calibrate these arrays. By treating each data collection location in the multi-pass configuration like an element of a digital beamforming array, similar calibration techniques can be used to, analogously, phase calibrate the synthetic aperture radar (SAR) data stack in interferometric SAR (IFSAR) processing. In this work, three data-driven phase calibration techniques are demonstrated on simulated and measured (Gotcha Volumetric SAR) data stacks, with the resulting height maps showing improved focusing of the scatterers in elevation.

Conference Presentation

Citation Download Citation

Kelly Cheung and Brian Rigling "Application of digital beamforming phase calibration techniques in multi-pass interferometric SAR for improved height mapping", Proc. SPIE 13032, Algorithms for Synthetic Aperture Radar Imagery XXXI, 1303202 (7 June 2024); https://doi.org/10.1117/12.3004211

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