Sentinel-1 TOPS Interferometry for Ice Flow Mapping

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

Tagungsband: EUSAR 2021

Seiten: 5Sprache: EnglischTyp: PDF

Kusk, Anders; Andersen, Jonas Kvist; Merryman Boncori, John (Technical University of Denmark, Lyngby, Denmark)

A major challenge in applying Sentinel-1 interferometry to measure ice sheet velocity is the significant horizontal scene motion associated with ice flow, which can cause phase discontinuities at burst boundaries in the TOPS interferograms, leading to phase unwrapping problems. We present a simple method that uses an external multi-year average velocity map to account for the bulk of the scene motion in the coregistration, allowing phase unwrapping even in scenes with significant azimuth motion. The method is applied to two regions in Greenland, and a validation using GPS is presented.