移动单站测向数据量对定位精度的影响

Effect of Single Mobile Stations Data Amount on Positioning Accuracy

移动测向系统对固定目标定位的过程中,在不改变测向精度的基础上,一般认为增加有效的测向数据量是提高目标交会定位精度的有效措施之一,但目前没有相应的模型。据此重点分析了移动单站有效测向数据量对定位精度的影响,给出了相关算法和定位误差模型,并进行了仿真。结果表明,不同位置的测向数据对提高定位精度有不同程度的贡献,当两次测向的位置相对于目标的夹角越接近90°,这种贡献就越大,因此在实际工作中要尽量满足或贴近这一条件。该问题的研究对移动单站合理安排工作计划和提高定位精度具有一定的理论指导意义和工程应用价值。

During the positioning of mobile direction finding system for fixed target, it is stated that one of effective measures of improving target intersection positioning accuracy is to increase effective direction-finding data amount without changing the direction- finding accuracy, but no model exists at present.This paper analyzes in detail the effect of effective direction-finding data amount of single mobile station on positioning accuracy, provides the related algorithm and positioning error model, and performs the simulation. The simulation results show that the direction-finding data for different positions have different contribution for improving positioning accuracy.When the included angle between the direction-finding positions of two times from the target is close to 90°, this contribution is bigger.So in the practical engineering, this condition should be satisfied as possible.This research has some theoretical significance and engineering application value for reasonable arrangement of working plan and improvement of positioning accuracy of single mobile station.