海洋监视卫星无源被动定位精度分析

分析了利用三星编队卫星对海上目标进行无源侦察、监视的原理,建立了利用时差定位法进行定位的精度模型,在此基础上推导了卫星对目标的定位精度与卫星编队构型、轨道高度、与目标的相对位置及卫星定轨精度和测量误差的关系。对模型进行了仿真计算和分析,仿真结果表明:合理增加卫星间的基线长度,保持卫星编队构型及其与目标间相对位置的均匀性可以有效提高卫星对目标的定位精度。

Analysis of Passive Location Precision Using Ocean Surveillance Satellite

The principle of using three satellites formation to reconnoiter and surveil targets on ocean passively is analyzed. The precision model of location making use of measuring the time difference of arriving is built. Based on the precision model, the relation between location precision and the satelliters′ formation configuration, orbit height, relative position with targets, orbit determination precision and measure error are deduced. The results of simulation show that increasing baseline length between the satellites rationally and maintaining uniformity of the satellites formation configuration and their relative position with target can improve the precision of locating target effectively.