Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information
Bathymetric information is critical for environmental monitoring and maintenance of marine safety. The signal received by passive optical remote sensors contains the reflectance information from the seabed, which then forms the informational basis of bathymetry; however, passive optical bathymetry m...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | International Journal of Applied Earth Observations and Geoinformation |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1569843222001844 |
| _version_ | 1811183420178432000 |
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| author | Xuechun Zhang Yi Ma Zhongwei Li Jingyu Zhang |
| author_facet | Xuechun Zhang Yi Ma Zhongwei Li Jingyu Zhang |
| author_sort | Xuechun Zhang |
| collection | DOAJ |
| description | Bathymetric information is critical for environmental monitoring and maintenance of marine safety. The signal received by passive optical remote sensors contains the reflectance information from the seabed, which then forms the informational basis of bathymetry; however, passive optical bathymetry models often require partial prior information. Although spaceborne active lidar has been shown to accurately detect bathymetry within narrow range of tracks, for some small islands or coastal sites, these tracks may not accurately traverse the shallow ocean area. To this end, a satellite derived bathymetry method based on ICESat-2 diffuse attenuation signal without prior information was proposed here. The diffuse attenuation coefficients of the water column were estimated according to the ICESat-2 lidar signal of deep areas near the target shallow water area, and the parameters for the bathymetry algorithm without prior depth information were obtained. Combined with the Sentinel-2 multispectral imagery, accurate large-scale bathymetric information of Zhongye Island and Reefs, Guam, and Ngau were obtained. Bathymetric data from ICESat-2 of multiple tracks were used for verification, and the results showed that the new model performed well, as mean absolute error (MAE) for the three study areas ranged 0.35–1.52 m, and root Mean square error (RMSE) fell between 0.74 and 1.89 m. In the absence of any bathymetric information, the new method can achieve higher or similar accuracy to the more commonly employed Stumpf model. |
| first_indexed | 2024-04-11T09:46:53Z |
| format | Article |
| id | doaj.art-dd6f3f650a934fe49b53068d3b7b3118 |
| institution | Directory Open Access Journal |
| issn | 1569-8432 |
| language | English |
| last_indexed | 2024-04-11T09:46:53Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Applied Earth Observations and Geoinformation |
| spelling | doaj.art-dd6f3f650a934fe49b53068d3b7b31182022-12-22T04:30:57ZengElsevierInternational Journal of Applied Earth Observations and Geoinformation1569-84322022-09-01113102993Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior informationXuechun Zhang0Yi Ma1Zhongwei Li2Jingyu Zhang3College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266500, China; Lab of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Technology Innovation Center for Ocean Telemetry, Ministry of Natural Resources, Qingdao 266061, ChinaLab of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Technology Innovation Center for Ocean Telemetry, Ministry of Natural Resources, Qingdao 266061, China; Corresponding author at: Lab of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China.College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266500, ChinaLab of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Technology Innovation Center for Ocean Telemetry, Ministry of Natural Resources, Qingdao 266061, ChinaBathymetric information is critical for environmental monitoring and maintenance of marine safety. The signal received by passive optical remote sensors contains the reflectance information from the seabed, which then forms the informational basis of bathymetry; however, passive optical bathymetry models often require partial prior information. Although spaceborne active lidar has been shown to accurately detect bathymetry within narrow range of tracks, for some small islands or coastal sites, these tracks may not accurately traverse the shallow ocean area. To this end, a satellite derived bathymetry method based on ICESat-2 diffuse attenuation signal without prior information was proposed here. The diffuse attenuation coefficients of the water column were estimated according to the ICESat-2 lidar signal of deep areas near the target shallow water area, and the parameters for the bathymetry algorithm without prior depth information were obtained. Combined with the Sentinel-2 multispectral imagery, accurate large-scale bathymetric information of Zhongye Island and Reefs, Guam, and Ngau were obtained. Bathymetric data from ICESat-2 of multiple tracks were used for verification, and the results showed that the new model performed well, as mean absolute error (MAE) for the three study areas ranged 0.35–1.52 m, and root Mean square error (RMSE) fell between 0.74 and 1.89 m. In the absence of any bathymetric information, the new method can achieve higher or similar accuracy to the more commonly employed Stumpf model.http://www.sciencedirect.com/science/article/pii/S1569843222001844Satellite derived bathymetryICESat-2 lidarDiffuse attenuation coefficientSentinel-2 |
| spellingShingle | Xuechun Zhang Yi Ma Zhongwei Li Jingyu Zhang Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information International Journal of Applied Earth Observations and Geoinformation Satellite derived bathymetry ICESat-2 lidar Diffuse attenuation coefficient Sentinel-2 |
| title | Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information |
| title_full | Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information |
| title_fullStr | Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information |
| title_full_unstemmed | Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information |
| title_short | Satellite derived bathymetry based on ICESat-2 diffuse attenuation signal without prior information |
| title_sort | satellite derived bathymetry based on icesat 2 diffuse attenuation signal without prior information |
| topic | Satellite derived bathymetry ICESat-2 lidar Diffuse attenuation coefficient Sentinel-2 |
| url | http://www.sciencedirect.com/science/article/pii/S1569843222001844 |
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