Comparison of Ocean Currents Derived from UHF ATI-SAR to Dispersive Shifts Observed in Sub-Aperture Image Sequences

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

Sletten, Mark; Menk, Steven; Toporkov, Jakov (US Naval Research Laboratory, Washington DC, USA)

We report interim results of an experimental investigation into measurement of ocean surface currents with an ultra high frequency synthetic aperture radar (UHF SAR) that supports an along-track interferometric (ATI) mode. We compare results from two different approaches to current measurement: standard ATI-SAR processing, and the analysis of wave dispersion in a time-sequence of sub-aperture images. We find that while the ATI-SAR analysis produces a current profile across the north wall of the Gulf Stream that is consistent with expectations, the dispersion method may require additional analysis to improve and evaluate its accuracy.