单点定位中一种载波相位平滑伪距方法  

A carrier phase smoothing pseudorange method for single point positioning

作　　者：管庆林 樊春明[1,2] 朱正平 彭飞 GUAN Qinglin;FAN Chunming;ZHU Zhengping;PENG Fei(Institute of Satellite Navigation and Spatial Information Engineering,Minjiang University,Fuzhou 350108,China;Research Center of Global Navigation Satellite System,Minjiang University&Fujian Xinghai Communication Technology Co.,Ltd.,Fuzhou 350108,China;Fujian Xinghai Communication Technology Co.,Ltd.,Fuzhou 350008,China)

机构地区：[1]闽江学院卫星导航与空间信息工程研究院,福州350108 [2]闽江学院-福建星海卫星定位导航研究中心,福州350108 [3]福建星海通信科技有限公司,福州350008

出　　处：《测绘科学》2019年第2期116-121,共6页Science of Surveying and Mapping

基　　金：福建省科技厅工业引导性(重点)项目(2016H0028);福州市科技局市校(院所)科技合作项目(2017-G-108)

摘　　要：针对伪距单点定位精度低,定位结果发散等问题,该文提出一种基于卫星高度角的卡尔曼滤波相位平滑伪距方法。基于该方法利用载波相位信息对C/A码伪距进行平滑,并用最小二乘法求解用户位置。通过实测的静态和动态数据验证了该方法的可行性。结果表明:和最小二乘法比,该方法定位结果更加平滑,一定程度上提高了伪距单点定位精度。其中,静态定位水平精度提升了20.7%,垂直精度提升了15.7%,三维精度提升了16.8%;动态定位水平精度提升了27.8%,垂直精度提升了20.8%,三维精度提升了21.2%。Aiming at the problem of low positioning accuracy and discrete positioning solutions of pseudorange single point positioning(SPP)technology,in order to improve the positioning accuracy,a phase smoothing pseudorange method with Kalman filter algorithm based on satellite elevation angle was presented to process the pseudorange observations by using the phase observations.The user location was obtained by the least squares estimation.Both static and kinematic tests for global positioning system(GPS)were conducted to assess the positioning accuracy of the new method.The results indicated that the solutions were more smooth and significantly improved the positioning by an average of 20.7%,15.7%and 16.8%using the static experimental data set,and 27.8%,20.8% and 21.2% using the kinematic experimental data set in the horizon direction,vertical direction,and three-dimensional,respectively.

关 键 词：定位精度 卫星高度角 卡尔曼滤波 相位平滑伪距 最小二乘法 

分 类 号：P228.4[天文地球—大地测量学与测量工程]