空天无源探测平台的差分定位体制研究

项目名称： 空天无源探测平台的差分定位体制研究

项目编号： No.61263028

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 蔡成林

作者单位： 桂林电子科技大学

项目金额： 43万元

中文摘要： 辐射源的精确定位是空天无源探测平台的一个重要内容。受空间几何布局（GDOP）和各种定位误差的影响，基于空天平台的辐射源无源定位存在定位精度过于粗略和覆盖区存在定位盲区的问题，如何有效地消除各种误差的影响和实现盲区无盲定位是最大限度地发挥空天平台效能的关键问题。 借鉴卫星导航系统的差分定位思想，结合角度、时差和频差定位方程以及已知辐射源的特征，提出空天无源探测平台的差分定位体制，通过角度辅助的多历元时差法解决盲区无盲定位问题；通过基于GNSS信号辅助的时间差综合改正方法、基于VRS差分原理的Doppler频差改正方法有效消除观测量所包含的系统误差，从而实现盲区无盲定位，实现定位精度的量级跨越。 在空天无源探测平台中提出差分定位体制，对推动空天无源定位向无缝定位和精密定位发展具有重要的推动作用，其研究成果具有较大的创新价值和现实意义。

中文关键词： 导航卫星；时差；频差；虚拟参考站；差分改正

英文摘要： Precise positioning for emitter source is an important content in the aerospace passive detection platform. Due to the effect of space geometric distribution ( GDOP ) and various positioning errors,as to emitter's passive positioning in coverage area, the genernal problem is that its positioning accuracy is rough and the positioning blind area always exists , how to effectively eliminate the influence of various positioning errors and how to realize no positioning blind area are the key problems to maximize the effectiveness of this platform. In view of differential positioning thought of satellite navigation system, combined with these characteristics of angle, time and frequency difference in positioning equation and space known emitter source, the differential positioning system in the aerospace passive detection platform is proposed, multi epoch time difference method through angle aided is planned to solve no blind positioning; the comprehensive correction method of the time difference based on GNSS signal auxiliary and Doppler frequency deviation correction method based on VRS differential principle，can effectively eliminate the system error of measurement, and it cause to realize no blind positioning in blind area, and to realize level crossing of positioning accuracy. Putting forward differential posi

英文关键词： Navigation satellite；time difference；frequency difference；Virtual reference station；differential correction