关键词: 低空目标, 基站数目, 几何精度因子, 布站方式

Abstract:

Since location accuracy for low-altitude targets is not good in the Short-Baseline system, a program of the main station off-center of eight-station arrangement is proposed. Firstly factors are analyzed which influence the location accuracy for line-of-sight environments. Then the relationship between main station position and location performance is researched, and a location method for the main station off-center of eight-stations is put forward by increasing the base-station number and layout of the main station off-center, which realizes multiple coverage of the monitoring area using the redundant measurement information by the main station off-center and more base stations provided. Finally the number of base stations and optimal disposition way for low-altitude targets are obtained in the airport by simulating the geometric dilution of precision (GDOP) distribution. Simulation figures and data show that the main station off-center of eight-station arrangement can be achieved over 95% coverage of the airport for low-altitude targets location.

Key words: low-altitude targets, base-station number, geometric dilution of precision, disposition way