Technical talk : Three-dimensional radar imaging of distributed media: applications, challenges, and perspectives for future spaceborne missions

Technical talk (Joint event with the Geomatics Seminar, ETH Zurich)

Three-dimensional radar imaging of distributed media: applications, challenges, and perspectives for future spaceborne missions

Invited Speaker: Dr. Stefano Tebaldini, Tenured Researcher, Politecnico di Milano,  Milan, Italy.

Date:  Thursday, October 19, 2017
Time: 17:00 - 19:00
Location: ETH Zürich, Hönggerberg, Building: HIL , Room: D 53

See also: online announcement of the Geomatics Seminar: http://www.igp.ethz.ch/en/news-and-events/geomatik_seminar/geomatik-hs-2017.html

 

Abstract

Synthetic Aperture Radar (SAR) Tomography (TomoSAR) is a microwave imaging technology to recover the 3-D structure of the illuminated scene by flying a radar sensor along multiple trajectories. At microwave regime, electromagnetic waves are capable of penetrating into natural media that are non-transparent at optical frequencies, for example vegetation, snow, ice, and sand. This feature makes TomoSAR sensitive to the vertical structure of those media, hence providing a substantial advantage over optical sensors.

The downside is that TomoSAR signal processing involves a number of challenging aspects as compared to conventional 2D SAR focusing, such as: 3D migration, focusing in the presence of propagation velocity variations, sub-wavelength data-based retrieval of platform position. The aim of this talk is to present different aspects relative to tomographic SAR imaging and its applications, such as:

- Basic imaging principles

- Signal processing

- Added value for forestry, snow-pack and glacier remote sensing

- Possibilities for spaceborne tomography

 

Bio

Stefano Tebaldini, Ph.D., received the master degree in Telecommunication Engineering and the Ph.D. degree from Politecnico di Milano in 2005 and 2009, respectively. Since 2005, he has been with the Digital Signal Processing Research Group at Politecnico di Milano. He has held the position of permanent researcher at the Dipartimento di Elettronica, Informazione e Bioingegneria at Politecnico di Milano since 2011. His activities in the field of radar and SAR processing have covered the following topics: 2-D and 3-D SAR imaging; spaceborne and airborne SAR processing; polarimetric SAR tomography; multi-pass SAR interferometry; SAR system calibration. His experience in tomographic and polarimetric analysis of natural media includes boreal, temperate, and tropical forests, ice sheets, and snow. He has been a member of two advisory groups at ESA, which are tasked with providing advice on the spaceborne missions Biomass and Saocom-CS. He was invited as lecturer at ESA’s Advanced Course on Radar Polarimetry and ESA’s Advanced Training Course on Land Remote Sensing. He is currently teaching the course “Signals and Systems for Remote Sensing” at Politecnico di Milano.