空间三站时差定位综合误差仿真分析

Simulation and Analysis of Integrated Error of Time-Differential Positioning of Three Stations in Space

平面三站时差定位技术因其无源定位的优势,在多个领域得到了广泛应用。然而,在实际应用中,它会受到系统误差和随机误差的影响,其中系统误差主要源于基站布设的不精确性和信号传播模型的假设不符合实际情况,而随机误差是由信号传播过程中的噪声和环境干扰等不可预测因素引起的。文章首先给出平面三站时差定位误差模型,并进一步分析三站空间时差定位系统误差,以此为基础建立空间三站时差定位误差模型,并给出了定位精度曲线对比结果。

The planar three-station time-difference positioning technique has been widely used in many fields due to its advantage of passive positioning.However,this technique is affected by systematic and random errors in practical applications,in which the systematic errors mainly originate from the inaccuracy of the base station deployment and the assumption of the signal propagation model that is not in accordance with the actual situation,while the random errors are caused by the unpredictable factors such as the noise and the environmental interference in the signal propagation process.In this paper,the planar three-station time-differential positioning error model is firstly given,and the three-station spatial time-differential positioning systematic error is further analysed,the spatial three-station time-differential positioning error model is established,and finally the results of the comparison of positioning accuracy curves are given.