Wind-wave effect on ATI-SAR measurements of ocean surface currents in the Baltic Sea
Paper i proceeding, 2016

Along-Track Interferometric (ATI) SAR has demonstrated through several studies a capability to detect ocean surface currents. One of the most challenging problems in ocean surface current retrieval using SAR is the removal of the wind-wave contribution. The phase difference provided by ATI-SAR technique is directly related to the radial velocity of the moving ocean surface. In order to infer the current-only velocity from the total phase the wind-wave contribution need to be removed. This is achieved by simulation of SAR Doppler spectra from given wind fields. This paper investigates the effect of the local wind on ATI-SAR phase. A study case, where the backscatter modulation is dominated by the wind variation, is illustrated using TanDEM-X data over the Baltic Sea. It is shown that retrieving high resolution winds from SAR data using an empirical wind model and using the retrieved winds as input to the SAR imaging model improves the simulated SAR signatures.

SAR wind speed

Ocean current

ATI SAR

Författare

Anis Elyouncha

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Leif Eriksson

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Roland Romeiser

University of Miami

Gisela Carvajal

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Lars Ulander

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

36th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016; Beijing; China; 10-15 July 2016

Vol. 2016-November 3982-3985

Ämneskategorier

Geofysisk teknik

Fjärranalysteknik

Styrkeområden

Livsvetenskaper och teknik

DOI

10.1109/IGARSS.2016.7730035

ISBN

9781509033324

Mer information

Skapat

2017-10-08