Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar
The oil–water mixture ratio for oil spills on the ocean surface is an important parameter for volume estimation of oil spills, response strategy for the oil spills, cleanup operations, and remediation planning for the impacts on wildlife. Hybrid-polarized (HP) mode compact polarization (CP...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-04-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/11/7/816 |
| _version_ | 1819294443314872320 |
|---|---|
| author | Haiyan Li William Perrie Jin Wu |
| author_facet | Haiyan Li William Perrie Jin Wu |
| author_sort | Haiyan Li |
| collection | DOAJ |
| description | The oil–water mixture ratio for oil spills on the ocean surface is an important parameter for volume estimation of oil spills, response strategy for the oil spills, cleanup operations, and remediation planning for the impacts on wildlife. Hybrid-polarized (HP) mode compact polarization (CP) synthetic aperture radar (SAR) imagery will soon be available with the launch of the RADARSAT Constellation Mission. The advantage of the proposed new SAR system is that CP images will have wider swath and shorter revisit time compared to quad-polarization (QP) images, which are presently available from space-borne and air-borne SAR. We present a methodology to retrieve the oil–water mixture ratio at the ocean surface using CP SAR imagery. We emulated the HP mode of CP SAR image using Uninhabited Aerial Vehicle SAR (UAVSAR) L band observations collected on 23 June 2010 over the site of the Deep Water Horizon drilling rig. The gap between elements ratio of CP SAR covariance matrix and that of QP SAR Sinclair matrix is bridged. Numerical optimization and look up table methods are used to relate the oil–water mixture ratio to elements of the covariance matrix for the HP data backscatter. The mixture ratio estimates determined from the ratio of diagonal elements of the covariance matrix for HP mode CP data are compared with results retrieved from the co-polarization ratio from the original QP SAR observations. Results from the proposed methodology for SAR images captured in the HP mode of CP data are shown to compare favourably to observed in situ data of the mixture ratios. |
| first_indexed | 2024-12-24T04:26:24Z |
| format | Article |
| id | doaj.art-239ba2e6fd22415bb0fa07cfd00de3d0 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-24T04:26:24Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-239ba2e6fd22415bb0fa07cfd00de3d02022-12-21T17:15:34ZengMDPI AGRemote Sensing2072-42922019-04-0111781610.3390/rs11070816rs11070816Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture RadarHaiyan Li0William Perrie1Jin Wu2Key Laboratory of Computational Geodynamics,University of Chinese Academy of Sciences, Beijing 100049, ChinaFisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS B2Y 4A2, CanadaKey Laboratory of Computational Geodynamics,University of Chinese Academy of Sciences, Beijing 100049, ChinaThe oil–water mixture ratio for oil spills on the ocean surface is an important parameter for volume estimation of oil spills, response strategy for the oil spills, cleanup operations, and remediation planning for the impacts on wildlife. Hybrid-polarized (HP) mode compact polarization (CP) synthetic aperture radar (SAR) imagery will soon be available with the launch of the RADARSAT Constellation Mission. The advantage of the proposed new SAR system is that CP images will have wider swath and shorter revisit time compared to quad-polarization (QP) images, which are presently available from space-borne and air-borne SAR. We present a methodology to retrieve the oil–water mixture ratio at the ocean surface using CP SAR imagery. We emulated the HP mode of CP SAR image using Uninhabited Aerial Vehicle SAR (UAVSAR) L band observations collected on 23 June 2010 over the site of the Deep Water Horizon drilling rig. The gap between elements ratio of CP SAR covariance matrix and that of QP SAR Sinclair matrix is bridged. Numerical optimization and look up table methods are used to relate the oil–water mixture ratio to elements of the covariance matrix for the HP data backscatter. The mixture ratio estimates determined from the ratio of diagonal elements of the covariance matrix for HP mode CP data are compared with results retrieved from the co-polarization ratio from the original QP SAR observations. Results from the proposed methodology for SAR images captured in the HP mode of CP data are shown to compare favourably to observed in situ data of the mixture ratios.https://www.mdpi.com/2072-4292/11/7/816oil–water mixture ratiocompact polarization SAR (CP SAR)hybrid-polarized SAR (HP SAR)oil spillpolarization SAR |
| spellingShingle | Haiyan Li William Perrie Jin Wu Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar Remote Sensing oil–water mixture ratio compact polarization SAR (CP SAR) hybrid-polarized SAR (HP SAR) oil spill polarization SAR |
| title | Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar |
| title_full | Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar |
| title_fullStr | Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar |
| title_full_unstemmed | Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar |
| title_short | Retrieval of Oil–Water Mixture Ratio at Ocean Surface Using Compact Polarimetry Synthetic Aperture Radar |
| title_sort | retrieval of oil water mixture ratio at ocean surface using compact polarimetry synthetic aperture radar |
| topic | oil–water mixture ratio compact polarization SAR (CP SAR) hybrid-polarized SAR (HP SAR) oil spill polarization SAR |
| url | https://www.mdpi.com/2072-4292/11/7/816 |
| work_keys_str_mv | AT haiyanli retrievalofoilwatermixtureratioatoceansurfaceusingcompactpolarimetrysyntheticapertureradar AT williamperrie retrievalofoilwatermixtureratioatoceansurfaceusingcompactpolarimetrysyntheticapertureradar AT jinwu retrievalofoilwatermixtureratioatoceansurfaceusingcompactpolarimetrysyntheticapertureradar |