Refraction Effect in SAR Processing for Focused Subsurface Tomography

Author(s)

Goes, Juliana A. ; Ore, Gian ; Lukin, K. A. ; Hernandez-Figueroa, Hugo E.

• Document type: Journal article
• Source: 2023 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE, IMOC; v. N/A, p. 3-pg., 2023-01-01.

Abstract

In synthetic aperture radar (SAR) imaging, the goal of subsurface tomography is to create detailed images of objects and structures underground. In order to obtain well-focused images, the refraction effect must be taken into account during SAR processing. This work proposes an adjusted back-projection algorithm and validates it with simulation and experimental results. The simulation model constitutes an underground air cavity and a multi-circular flight path. The experimental scenario includes a buried quad-corner reflector and an unmanned aerial vehicle (UAV) performing a spiral flight path. Both cases produced well-focused 3D images with the correct positioning of the targets. (AU)

• FAPESP's process: 21/11380-5 - CPTEn - São Paulo Center for the Study of Energy Transition
• Grantee: Luiz Carlos Pereira da Silva
• Support Opportunities: Research Grants - Science Centers for Development
• FAPESP's process: 18/00601-8 - Remote sensing radar carried by drone
• Grantee: Dieter Lubeck
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• FAPESP's process: 22/11397-8 - Drone-borne SAR with noise pulse and stepped frequency and delay for surface and tomographic mapping of soil and human body
• Grantee: Hugo Enrique Hernández Figueroa
• Support Opportunities: Research Grants - Visiting Researcher Grant - International