The Research Of ARPA Algorithm For Ship Navigation Radar

The ARPA algorithm of ship navigation radar is the most important part in the ARPA system. The ARPA system is used for ship collision alarm. The reliability and accuracy of the arithmetic relates to the safety of the maritime traffic. So the ARPA arithmetic of ship navigation radar research is a very important and useful topic. The ARPA arithmetic of ship navigation radar involves the generation of radar image, getting the metrical position of the target, filter arithmetic and so on.Today, the ARPA system has made some rules and standards. It depends on the assumption of the target runs in uniform rectilinear translation and it use theα-βfilter to smooth the parameters. But in the process of actual using, there is a lot of problems and shortage in the old arithmetic, so we must analyze the old arithmetic and make the necessary improvement on them.The experiential value is used as the default value in the old arithmetic, so it is lack of the good adaptation. At the beginning of the tracking process it leads to the large deviation of the target parameters. The old arithmetic depends on the assumption of the target runs in uniform rectilinear translation and it search for the target in the predictable position. If the target turns in a large scope, it leads to the large deviation of the target parameters.There are many problems in the judgment of the target position. The old arithmetic only selects the position in the scope of the port door, so the target position has large deviation and it leads to the imprecision of the target parameters.As the instability of the ship navigation radar images, the old arithmetic still get the wobbly parameters when the target is stop.After analyzing the problems and shortage in the old arithmetic, some countermeasures and advices are given. These countermeasures and advices are used to improve the accuracy of the arithmetic and enhance the effect in alarm of ships collide.