Ocean Remote Sensing Based on Radar, Sonar and Optical Techniques (Second Edition)

Dear Colleagues,

The ocean covers approximately 71% of Earth’s surface, and it plays an important role in the human world. Therefore, understanding, monitoring, and protecting the ocean are areas of constant concern. Radar is one of the most commonly used devices for ocean remote sensing above the sea surface, and it can be used for pre-surveying marine oil, marine offshore terrain inversion, the monitoring of marine environment such as in the detection of oil spills, and so on. Sonar is widely exploited below the sea surface. Based on the sonar technique, underwater terrain mapping, underwater rescue, underwater archeology, the detection of underwater unexploded explosives, and so on can be easily achieved. Underwater optical imaging can also be used for marine detection, underwater robotics, underwater archeology, and other fields. Based on radar, sonar, and optical technologies, we can well understand, monitor, and protect the ocean.

Electromagnetic, acoustic and optical sensors can be installed at fixed locations in harbors, either on the surface, underwater, or on mobile platforms such as unmanned, aerial, underwater, or surface vehicles, as well as on manned surface ships. Multiple sensors are often networked to effectively explore, observe, and exploit the ocean. The transmission characteristics of the electromagnetic, acoustic, and optical signal are affected by many factors, such as propagation loss, multipath, Doppler, time-varying channel, radio interference, attenuation, scattering, and so on. In addition, the sensor network also has problems such as sparsity, limited sensor node energy, and unstable topology and transmission, which seriously reduce the performance of remote sensing, navigation, positioning, environmental perception, array processing, and signal detection based on the sensor network. Consequently, the image quality, color distortion, contrast, etc., can be severely degraded. Therefore, it is critical for electromagnetic, acoustic, and optical sensor and network technology to realize the effective acquisition of ocean information through advanced signal processing technology.

In this Special Issue, researchers are invited to report their latest progress in the fields of radar, sonar, and optics. This includes radar, sonar and optical communication, navigation, positioning, environmental perception, array processing and signal detection, remote sensing, acoustic tomography, ocean sound field monitoring, underwater optical imaging, etc.

Aim of the Special Issue and how the subject relates to the journal scope.

• Radar imaging;
• Sonar imaging;
• Optical imaging;
• Image denoising;
• Image enhancement;
• Array signal processing;
• Communication and networks;
• Internet of things;
• Target detection and recognition;
• Obstacle detection and collision avoidance;
• Localization and bathymetry mapping.

Dr. Xuebo Zhang
Prof. Dr. Ning Li
Prof. Dr. Haiyong Xu
Dr. Farman Ali
Guest Editors

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