The MiniSAR system has the characteristics of small size, light weight, and low power consumption and can be installed on platforms such as a UAV. The contents in this paper are arranged as follows: Section 2 describes the configuration of the MiniSAR system Section 3 explains the flight experiment Section 4 describes the key image processing technologies in the experiment Section 5 presents the imaging results, and Section 6 draws the conclusion.
Bow wave underwater submarine surface verification#
The basic results indicate that the experimental MiniSAR system can be a good verification platform for constructing SAR imaging datasets of wake caused by an unmanned underwater vehicle (UUV) and analyzing SAR imaging algorithms. The implementation and data processing results of the first flight experiment are presented. In this paper, a small unmanned aerial vehicle (UAV) airborne array interferometric MiniSAR system is designed that can be used for data acquisition and technology validation.
However, due to military secrecy or other reasons, there are few results of submarine wake detection. Therefore, airborne SAR and spaceborne SAR in sea trials can be used to obtain the performance characteristics of submarine wakes under various sea conditions. The other parameters, such as the diving depth and speed of the submarine, can also be calculated.Ĭurrent research shows that the near-field surface waves generated by a submarine’s motion cause a water surface bulge above the submarine, also known as the “Bernoulli hill”. Then, the underwater condition can be conjectured, such as whether there is a submarine passing through. The main idea of this method is to analyze and compare the synthetic aperture radar (SAR) image in the monitoring area with the accurate image class library. This is mainly because the radar itself has the characteristics of high precision and strong anti-interference ability, which can ensure the reliability of the detection results. The combination of various submarine detection methods has become a hot research topic.įrom current technological development, the method of indirect detection of submarines through radar wakes has great application prospects. Therefore, simply using traditional acoustic methods cannot meet current requirements of submarine detection. At the same time, due to the multiple reflections of sound waves, the positioning error based on sonar is relatively large. However, with the development of mute technology, the submarines can hardly be detected by sonar. At present, the main method for detecting submarines is based on sonar. Submarines have the characteristics of good concealment and strong raid ability, which are indispensable and extremely important weapons in modern warfare. The system provides a good experimental verification platform to construct the follow-up SAR imaging dataset of UUV wake and investigate related digital signal processing algorithms. The imaging performances are evaluated, and the imaging capabilities of the system are verified. The key technologies for Doppler frequency estimation and motion compensation, the implementation of the flight experiment, and the image data processing results are given. This paper introduces the basic structure and the performance of the experimental system. A flight experiment is then conducted to detect the movement of an unmanned underwater vehicle (UUV) through the wake, which can be captured by SAR.
In order to promote the development and application of SAR imaging technology, a MiniSAR experiment system is designed and developed, which provides a platform for related technology investigation and verification.
It has become one of the most significant research topics in the current SAR imaging field. Synthetic aperture radar (SAR) imaging has important application potential in sea environments research, such as submarine detection.
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