Science Service System

Summary of Proposal OCE3356

TitleAlgorithm for wave retrieval from TerraSAR-X imagery in both VV- and HH-polarization
Investigator shao, weizeng - Ocean University of China, College of Physical and Environmental Oceanography
Team Member
Associate Jian, Sun - Ocean University of China, Physical Oceanography Lab
Ph.D Ye-xing, Shen - Zhejiang Ocean University, Marine Acoustics and Remote Sensing Laboratory
Ph.D Bo, Lin - Zhejiang Ocean University, Marine Acoustics and Remote Sensing Laboratory
SummaryTerraSAR-X with its sister TandDEM-X, can be used for wave retrieval due to highresolution (up to 1m). So far, theoretical-based algorithm has implemented for wave retrieval from TS-X, the results have established in the paper entitled ‘OceanWave Parameters Retrieval from TerraSARX Images Validated against BuoyMeasurements and Model Results’ in Remote Sensing 2015. Besides, there is another empirical algorithm, called XWAVE. XWAVE is completely empirical function developed for VV-polarization TS-X data, in which significant wave height relies the SAR-derived wind speed and the other two parameters derived from SAR spectrum. Recently,we develop a semi-empirical function for significant wave height retrieval, which describes the relation between significant waveheight and cutoff wavelength, radar incidence angle, and wave propagationdirection relative to radar look direction by using Sentinel-1 SAR image and collocated significant wave height from NOAA in situ buoys. Our algorithm can be applicable with any prior knowledge and it is supposed to work forTS-X imagery. The final result of this AO is to adopt the newly algorithm for TS-X in both VV- and HH-polarization. As pointed out by the reviewers in our last article online in IEEE JSTARS, more images should be used for tuning the new X-band polarization ratio (XPR2) and at least 50 images have to been used for validation. Therefore, in the study, we plan to use 200 images in VV-polarization and 200 images in HH-polarization for tuning the algorithm for wave retrieval. Few TS-X images used may leads to doubt by reviewers, which is major question pointed out in our last article published in IEEE JSTARS. And 100 images in VV-polarization and 100 images in HH-polarization for validation. It is necessary to figure out that those images will cover the NOAA in situ buoys' location.

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