困难环境下的GPS定位实现  

GPS positioning in a severe environment

作　　者：任锴[1,2] 杨力[1] 郭建锋[3] 

机构地区：[1]信息工程大学测绘学院,郑州450052 [2]西安测绘信息技术总站,西安710054 [3]信息工程大学理学院,郑州450001

出　　处：《测绘科学》2012年第1期5-7,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金(40874007)

摘　　要：本文给出了在困难环境下进行GPS定位的方法,使得在仅能观测3颗甚或2颗卫星时,仍然能够实现三维导航定位,同时对由于卫星几何结构不好导致的法方程病态性问题进行了探讨。仿真结果表明了本文方法的可行性和有效性。In a severe environment,the number of visible satellites may be less than four,thus it could not get position with only GPS.In the paper,a new method was presented to obtain 3D position even if only three or two GPS satellites are available.The ridge estimation was introduced to circumvent the ill conditioning of normal equation,which is caused by weak satellite geometrical structure.A series of simulations were implemented to verify the feasibility and effectiveness.

关 键 词：全球定位系统 困难环境 GPS三星定位 GPS双星定位 岭估计 

分 类 号：P228.4[天文地球—大地测量学与测量工程]