A Comparison of Function Bases For Polarization Coherence Tomography in Forest Scenarios

Konferenz: EUSAR 2021 - 13th European Conference on Synthetic Aperture Radar
29.03.2021 - 01.04.2021 in online

Tagungsband: EUSAR 2021

Seiten: 3Sprache: EnglischTyp: PDF

Guliaev, Roman; Pardini, Matteo; Papathanassiou, Konstantinos P. (German Aerospace Center (DLR), Microwave and Radar Institute (HR), Wessling, Germany)

Polarization Coherence Tomography (PCT) addresses the TomoSAR inversion by approximating the unknown vertical reflectivity profile by a weighted series of functions constituting a basis. The individual weights can be estimated from the available interferometric coherences. This concept becomes particularly suitable for space borne TomoSAR implementations over forest volumes in which the reflectivity profiles have to be estimated relying on a small number of acquisitions (or interferometric coherences) and/or non-uniform baseline distributions. However, the choice of an adequate (orthogonal) basis suitable for forest scenarios is still an open point. In this work, we compare different alternatives on a real data set acquired in an airborne campaign over a temperate forest.