On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data
Oceanic front extraction from synthetic aperture radar (SAR) images is of great significance to the study of marine ecosystems. At present, the methods for oceanic front extraction are usually based on SAR intensity images, which treat oceanic fronts as edge-like features in the SAR images. However,...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2022-01-01
|
| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9743310/ |
| _version_ | 1817988493793558528 |
|---|---|
| author | Kai Sun Jinsong Chong Lijie Diao Zongze Li Xianen Wei |
| author_facet | Kai Sun Jinsong Chong Lijie Diao Zongze Li Xianen Wei |
| author_sort | Kai Sun |
| collection | DOAJ |
| description | Oceanic front extraction from synthetic aperture radar (SAR) images is of great significance to the study of marine ecosystems. At present, the methods for oceanic front extraction are usually based on SAR intensity images, which treat oceanic fronts as edge-like features in the SAR images. However, affected by radar parameters and sea state, sometimes, oceanic front signatures may not be clearly visible in the SAR intensity images. Therefore, existing methods are limited. In order to solve this problem, a method combining intensity and Doppler information for oceanic front extraction is proposed. Using Chinese Gaofen-3 single-look complex (SLC) data, three cases where oceanic front signatures are clearly visible, partially visible, and extremely weak in the SAR intensity images are investigated, which demonstrate how the Doppler velocity gradient across a front can be leveraged to enhance the extraction of oceanic fronts from SAR data. The results show that the Doppler data, as supplementary information, not only can complement the oceanic fronts extracted from SAR intensity images, but also can be used as a reference for the oceanic fronts extracted from SAR intensity images. |
| first_indexed | 2024-04-14T00:34:46Z |
| format | Article |
| id | doaj.art-3023315e0c48487f89a5fba15f7d7911 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-04-14T00:34:46Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-3023315e0c48487f89a5fba15f7d79112022-12-22T02:22:25ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352022-01-01152709272010.1109/JSTARS.2022.31624459743310On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR DataKai Sun0https://orcid.org/0000-0003-1267-5534Jinsong Chong1https://orcid.org/0000-0002-0840-1234Lijie Diao2Zongze Li3Xianen Wei4National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaOceanic front extraction from synthetic aperture radar (SAR) images is of great significance to the study of marine ecosystems. At present, the methods for oceanic front extraction are usually based on SAR intensity images, which treat oceanic fronts as edge-like features in the SAR images. However, affected by radar parameters and sea state, sometimes, oceanic front signatures may not be clearly visible in the SAR intensity images. Therefore, existing methods are limited. In order to solve this problem, a method combining intensity and Doppler information for oceanic front extraction is proposed. Using Chinese Gaofen-3 single-look complex (SLC) data, three cases where oceanic front signatures are clearly visible, partially visible, and extremely weak in the SAR intensity images are investigated, which demonstrate how the Doppler velocity gradient across a front can be leveraged to enhance the extraction of oceanic fronts from SAR data. The results show that the Doppler data, as supplementary information, not only can complement the oceanic fronts extracted from SAR intensity images, but also can be used as a reference for the oceanic fronts extracted from SAR intensity images.https://ieeexplore.ieee.org/document/9743310/Chinese Gaofen-3 (GF-3) satelliteoceanic front extractionsurface Doppler velocitysynthetic aperture radar (SAR) |
| spellingShingle | Kai Sun Jinsong Chong Lijie Diao Zongze Li Xianen Wei On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Chinese Gaofen-3 (GF-3) satellite oceanic front extraction surface Doppler velocity synthetic aperture radar (SAR) |
| title | On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data |
| title_full | On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data |
| title_fullStr | On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data |
| title_full_unstemmed | On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data |
| title_short | On the Use of Ocean Surface Doppler Velocity for Oceanic Front Extraction From Chinese Gaofen-3 SAR Data |
| title_sort | on the use of ocean surface doppler velocity for oceanic front extraction from chinese gaofen 3 sar data |
| topic | Chinese Gaofen-3 (GF-3) satellite oceanic front extraction surface Doppler velocity synthetic aperture radar (SAR) |
| url | https://ieeexplore.ieee.org/document/9743310/ |
| work_keys_str_mv | AT kaisun ontheuseofoceansurfacedopplervelocityforoceanicfrontextractionfromchinesegaofen3sardata AT jinsongchong ontheuseofoceansurfacedopplervelocityforoceanicfrontextractionfromchinesegaofen3sardata AT lijiediao ontheuseofoceansurfacedopplervelocityforoceanicfrontextractionfromchinesegaofen3sardata AT zongzeli ontheuseofoceansurfacedopplervelocityforoceanicfrontextractionfromchinesegaofen3sardata AT xianenwei ontheuseofoceansurfacedopplervelocityforoceanicfrontextractionfromchinesegaofen3sardata |