Passive Positioning Method, Based on Combined Measurement, of Fixed Two Stations

In this chapter, two passive detection methods of long baseline fixed bistatic are presented based on the short baseline composite array. The first method is a two-station phase differential direction method with a long baseline. Direction finding and ranging are realized at each station using short baseline phase difference measurement technology. The path difference between two stations is obtained by using the radial distance measured by the two stations, respectively. On this basis, using the midpoint direction finding solution of a single basis, the phase differential direction finding formula of two stations with long baseline can be given directly. The second method is a method that uses a similar recursive method to implement the long baseline multi-station passive detection based on phase difference measurement without ambiguity. The similar recursion method is a method to obtain the long base path difference by using the similarity of triangles according to the path difference of short base line array, and then construct the virtual three-station linear array, from which the location calculation can be carried out directly by using the ranging formula of the double base array. It may be a feasible method to construct a long baseline multi-station phase difference detection system using a short baseline composite array.

Keywords: Combination measurement, Long baseline positioning, Short baseline, Radial distance, Dual-station location, Phase difference direction finding, Similar recursion, Virtual array, Baseline extension, Multi-station location, Passive location