Background of the plan

In recent years, illegal activities such as illegal docking, illegal residence, maritime smuggling, and sand dredging and dumping have occurred frequently in China's coastal waters, demonstrating the enormous challenges faced by the coordinated defense and control of coastal defense. It has also exposed the serious deficiencies in the sharing and fusion capabilities of various sensing information in coastal, sea, air, and space, especially the dependence on imported front-end sensing equipment such as radar and AIS, the lack of data fusion processing technology, and the weak analysis of the dominant situation of water area policing, which have become the core bottlenecks restricting the improvement of coastal defense capabilities. The long coastline and vast sea areas of our country are the engine of the national economy. Improving the comprehensive management and control capabilities of coastal defense plays a positive role and has far-reaching strategic significance in safeguarding national sovereignty, maritime rights and security, promoting national economic development and social stability.

Scheme Introduction

The the maritime situational awareness system focuses on "maritimer safety guarantee", with the goal of solving practical problems for the competent authorities in cracking down on illegal docking, illegal residence, maritime smuggling, illegal immigration, maritime search and rescue and other water illegal events. It integrates multiple proprietary technologies of the project team to build a water situation awareness system that integrates search and tracking, monitoring and early warning, and command and dispatch. The system integrates shore based/shipborne radar, AIS/S-AIS, CCTV, VHF, GPS, 4G/5G and other transmission or communication equipment, which can quickly search, identify and locate sea surface targets such as ships, motorboats, and low altitude aircraft in real-time, generate target situations in real time, automatically alert suspicious targets, continuously track and locate designated targets, and achieve real-time monitoring and early warning of detected targets through multi-source data fusion and information analysis. It establishes a unified shared situation for the entire monitoring water area, quickly conducts command and dispatch to achieve rapid attack, improves the overall level of emergency decision-making and planning, and effectively enhances law enforcement capabilities.

system architecture

The front-end perception equipment of the multi-source data fusion maritime situation awareness system includes radar AIS/S-AIS、 Optoelectronics VHF、 At least 10 types of sensors, such as Beidou and drones, can be used to quickly search, identify, and locate sea targets such as ships, motorboats, and low altitude aircraft in real-time. They can generate real-time target situations, automatically alert suspicious targets, and continuously track and locate designated targets. Through multi-source data fusion and information analysis, real-time monitoring and early warning of detected targets can be achieved, establishing a unified shared situation for the entire monitoring water area.

major function

The multi-source data fusion maritime situation awareness system is an integrated system that integrates maritime intelligence, monitoring, and command. It uses modern information processing and network communication technology to obtain real-time sensor information such as radar, AIS, S-AIS, EOSS, CCTV, etc., extract maritime target information, and collect hydrological, meteorological, and law enforcement vessel status information. With the help of a big data platform, it integrates and analyzes various collected information for early warning analysis, perceives real-time maritime situations, and identifies abnormal behaviors of maritime targets; Then, through various types of application terminals, real-time maritime situation intelligence, GIS services, video surveillance, traffic management, event management, record playback, data analysis, operational support, and communication services are provided to command and law enforcement personnel at all levels, assisting management departments in formulating better management and law enforcement strategies, commanding law enforcement actions, and helping the police comprehensively enhance their maritime control capabilities.

Main technical parameters

The system technical indicators are benchmarked against the international first-class level, and the key indicators are all better than the international indicator requirements.

Advantages of the plan

1、 The system provides non constant adaptive sea clutter suppression function. The non constant adaptive sea clutter mode adopts a dynamic threshold to adapt to the constantly changing sea clutter conditions. The clutter suppression threshold varies according to the range and distribution of clutter throughout the entire 360 ° radar detection range. Beyond 15 nautical miles, non constant adaptive sea clutter suppression does not affect radar signals, and signal display is only affected by gain and rain clutter suppression, which is superior to the fixed clutter suppression model provided by the standard fixed format controlled by manual sea clutter.

2、 The system adopts an adaptive clutter power statistics algorithm to achieve cloud and rain suppression through statistical power models, data compression, and scan to scan accumulation, avoiding target loss or excessive false alarms caused by a single threshold during the calculation of scan to scan iteration accumulation.

3、 The system adopts an environment aware detection and tracking design framework, which weakens the preprocessing of the graph, further explores and utilizes perceptual information, and constructs an algorithm model with multi hypothesis tracking (MHT)+integrated probabilistic data association (IPDA)+unscented Kalman filter (UKF) as the core to achieve target awareness. The initiation, maintenance, and termination of targets are unified in a software processing framework to improve the tracking continuity and stability of sea surface targets in complex environments.