Two-station direction-finding cross positioning tracing algorithm on earth surface based on rhumb lines

Abstract

The invention designs an algorithm flow for carrying out cross positioning tracing by using rhumb lines of two observation stations on the earth surface. The invention provides a method for positioning and tracing a plurality of moving targets through crossing the rhumb lines by using two passive direction-finding sensors in a region which is at low latitude on the earth surface, so as to solve the problems of the traditional method that the adaptable region range is small, the positioning and tracing precision is low and the calculation amount is too great. The algorithm is characterized in that (1) in the algorithm principle, longitude and latitude coordinates of the two observation stations are positioned and the positions of a target relative to the two stations are respectively obtained by direction finding, so as to determine the rhumb lines which pass through each observation station from the measured azimuth angles; if the same target is observed, the two rhumb lines are crossed at one point and an approximate target position is obtained by revising a crossed point coordinate; (2) an algorithm formula derivation process is provided; and (3) the algorithm flow of intensive type cross positioning tracing and the algorithm flow of distribution type cross positioning tracing are provided based on the algorithm principle and the formula. The method disclosed by the invention is applicable to rapidly and accurately positioning and tracing of a plurality of moving targets, and has important applications values on aspects of military use and civil use.

Description

Technical field [0001] The invention is a method for locating and tracking multi-moving targets by crossing rhumb lines with two passive direction-finding sensors in areas with low latitude on the earth's surface. Background technique [0002] Passive direction finding cross-location and tracking technology has been paid more attention by domestic and foreign scholars and related departments because of its strong anti-interference ability and good concealment. The application of direction finding and positioning technology has a long history. It is to approximate a certain area as a plane, and then use the method of plane geometry to perform cross positioning calculation. This method is simple and effective when the target distance is not far and the range of activities is not large. However, with the continuous development of technology, the range of activities of various land, sea and air vehicles continues to expand, and the speed of movement becomes faster and faster. Th...

AI Technical Summary

Problems solved by technology

[0006] From the published literature at home and abroad, there is no relevant research report on the cross positioning of two stations using this method.

Images