Wind direction ambiguity removal using along-track InSAR: A case study
Paper in proceedings, 2018

The main problem in wind retrieval using SAR imagery is the lack of the wind direction information. A few methods have been proposed to extract the wind direction from SAR images. The main limitation of these methods is the 180 degrees ambiguity in the direction. Usually, an external source of wind direction is used to remove this ambiguity. This study exploits the Along-track Interferometric SAR (ATI-SAR) phase to demonstrate its usefulness to tackle this problem. A method is proposed to remove the wind direction ambiguity using the ATI-SAR phase information. This is based on the fact that the interferometric phase is related to the sea surface motion direction. Depending on the sign convention, the phase is positive/negative for advancing/receding target respectively. This effect is used to assist the wind extraction algorithm to select the most plausible direction. The results show a very good agreement with atmospheric model and visual investigation.

InSAR

ocean surface wind

wind direction

TerraSAR-X

Author

Anis Elyouncha

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Leif Eriksson

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Roland Romeiser

University of Miami

Lars Ulander

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium

2153-6996 (ISSN)

Vol. Volume 2018-July 3262-3265

Subject Categories

Other Physics Topics

Signal Processing

Computer Vision and Robotics (Autonomous Systems)

DOI

10.1109/IGARSS.2018.8518143

More information

Latest update

7/2/2019 1