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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Assessment of Simulated Compact Polarimetry of the High Resolution Radarsat Constellation Mission SAR Mode for Multiyear and First Year Sea Ice Characterization
摘要： Synthetic Aperture Radar (SAR) remote sensing has become a valuable tool for sea ice characterization. Operational sea ice monitoring usually relies on SAR data from single- or dual-polarized beam modes such as the ScanSAR mode of RADARSAT-2. However, such imagery cannot accurately discriminate certain sea ice types and open water states at all times during the year. Thus, the recently proposed compact polarimetric (CP) SAR configuration for Earth observation could be a compromised choice for operational sea ice observation. This configuration will be included in the future RADARSAT Constellation Mission (RCM). In this study, simulated CP SAR data of the RCM High Resolution (HR) SAR mode is evaluated for sea ice classification. Results indicate promising performance of the RCM HR mode for First Year Ice (FYI) and Multiyear Ice (MYI) classification using CP SAR data.
关键词： RCM,compact polarimetric SAR,sea ice
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Assessment of Simulated Compact Polarimetry of the RCM Medium Resolution sar Modes for Oil Spill Detection
摘要： Operational detection and discrimination of oil spills over oceans has received considerable attention due to its impact on marine ecosystem from environmental and political points of view. Synthetic Aperture Radar (SAR) is a valuable instrument for maritime pollution monitoring. The three main requirements for effective operational oil spill detection using SAR are: 1) low noise floor, 2) large area coverage, and 3) maximizing detection and discrimination of pollution and 'lookalike' features, by polarization diversity, multiple frequency, etc. In order to reconcile the advantages of fully polarimetric SAR with larger area coverage, compact polarimetry (CP) acquisitions offer a trade-off between the above mentioned requirements. The future Canadian RADARSAT Constellation Mission (RCM) will enable the acquisition of CP SAR data in wide swath imagery, including ScanSAR modes. In this study, we investigate the potential of CP from three RCM SAR modes for oil spill detection. Results indicate that the RCM MR30 SAR mode has promising oil spill detection performance.
关键词： RCM,compact polarimetric SAR,oil spill
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - A Modified Framework for Ship Detection from Compact Polarization SAR Image
摘要： In recent years, the compact polarimetric SAR (CP SAR) imaging mode has received much attention because of its advantages in swath width compared to the quad-polarization mode and in information of scattering targets compared to the linear dual-polarization mode, respectively. For object detection (e.g., ship, sea ice, and drilling platform) in maritime monitoring which has been widely discussed, it is still a challenge to eliminate the false alarms caused by ocean clutter. Accordingly, a modified feature-based framework for ship detection using CP SAR data was proposed in this paper. In particular, a Guard-filter was used after feature extraction to reduce the effect of ocean clutter. Several simulated CP SAR imageries based on Gaofen-3 quad-polarization SAR image were selected for further investigations on ship detection. A SVM classifier was included in the framework to do a pixel-wise classification. The result shows that the proposed method has a better performance compared to traditional methods (e.g., constant false alarm rate and polarimetric whitening filter) and the feature–based method without filtering. Overall false alarm rates are decreased by 35% with the proposed method.
关键词： false alarm,ship detection,Gaofen-3,Compact polarimetric SAR,Guard-filter
更新于2025-09-09 09:28:46