Study on the target association arithmetic of the marine radar and AIS

AIS (Automatic Identification System), a new type of Navaid at sea, is one of the key equipment to navigation for a ship as same as radar. But, there are many differences between them in the performance. It is very important to fuse the target information from the two sensors to get mutual benefits. The paper studies on the association arithmetic of the targets from the two sensors by adopting T_D coarse target association judgment and multi-factor fuzzy integration decision-making, including target position coordinate conversion, space time unification and so on. By the use of computer simulation, the results show that the arithmetic is right and effective. At the same time, It discusses the relation of the association probability with the association threshold.