Dear Colleagues,

In recent years, radar and sonar technology has been at the center of several major developments in remote sensing, both in civilian and defense applications. It allows us to observe targets in space, on land, at sea, and underwater, providing increasingly precise information about them. Although radar technology has been around for more than a century, it is still evolving and is now implemented in a variety of maritime, air, satellite, and land applications. Novel technologies, such as sparse image reconstruction and multistatic active and passive SAR and ISAR imaging, are improving image quality and broadening the scope of application. The rapid development of three-dimensional automotive radars that can recognize different objects and assign the risk of collision is another example of this technology’s progress. Aside from classical pulse radars, the use of FMCW technology in maritime radars is becoming increasingly popular. Simultaneously, sonar technology has also been used for dozens of decades, initially only for military solutions, but today, using 3D versions, it is applied in many underwater tasks, such as underwater surface imaging, target detection, tracking, etc. The impact of sonar technologies has grown, particularly at the beginning of the autonomous vehicle era. Recently, the influence of artificial intelligence on radar and sonar image processing and understanding has emerged. Radar and sonar systems are mounted on smart and flexible platforms and on several types of unmanned vehicles. Both of these technologies focus on remote detection of targets, and both may encounter many common scientific challenges. Unfortunately, specialists from the radar and sonar fields do not interact with each other enough, slowing down progress in both areas.

This Special Issue will report on the most recent advances and trends in the field of remote sensing for radar and sonar image processing, addressing novel developments and applications, and providing practical solutions to open questions. Following the success of the previous two installments, this third installment aims to further improve data and knowledge exchange within the scientific community, while also allowing experts from other fields to understand radar and sonar problems. Topics in this Special Issue include, but are not limited to, the following:

• 3D radar and 3D sonar imaging;
• Artificial intelligence for radar and sonar data processing;
• Automatic target detection and classification;
• Automotive and maritime radar;
• Ground penetrating radar application in civil engineering;
• Interferometric methods;
• Multi-sensor data fusion;
• Passive and active radar imaging (SAR, ISAR);
• Radar and sonar surveillance systems;
• Radar and sonar target tracking and anti-collision algorithms and methods;
• Radar and sonar technology for autonomous vehicles;
• Radar sensors design and platform developments;
• Side scan sonar, imaging sonar, chirp sonar, and forward-looking sonar;
• Sonar image processing, data reduction, feature extraction, and image understanding;
• Synergy between radar, sonar, and other sensors.

Prof. Dr. Andrzej Stateczny
Dr. Witold Kazimierski
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Remote Sensing is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• Radar and Sonar Imaging and Processing Ⅲ in Remote Sensing (8 articles)