Android智能手机联合高度角与信噪比的GPS/BDS定位随机模型研究  

GPS/BDS Positioning Stochastic Model Combining Elevation Angleand Signal-to-Noise Ratio for Android Smartphone

作　　者：张拓 叶世榕[1] 夏朋飞[1] 许晓东 ZHANG Tuo;YE Shirong;XIA Pengfei;XU Xiaodong(GNSS Research Center,Wuhan University,129 Luoyu Road,Wuhan 430079,China;Hangke Technology Development Co Ltd,A31 Guangximenbeili,Beijing 100028,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉市430079 [2]航科院(北京)科技发展有限公司,北京市100028

出　　处：《大地测量与地球动力学》2023年第11期1172-1177,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41974031);国家重点研发计划(2019YFC1509603)。

摘　　要：在对Xiaomi 8智能手机GPS/BDS原始数据质量分析基础上,提出一种联合高度角与信噪比的GPS/BDS定位随机模型。实测数据解算结果表明,在标准单点定位(standard point positioning, SPP)解算模式下,联合高度角与信噪比随机模型的定位精度优于单一因素随机模型;在附加电离层和对流层约束的单频精密单点定位(precise point positioning, PPP)后处理解算模型中,联合高度角与信噪比随机模型的定位精度与收敛时间均优于单一因素随机模型。采用联合高度角与信噪比随机模型,1 min定位精度可收敛至1 m以内,5 min水平定位精度优于0.5 m,最终水平方向和高程方向定位精度分别优于0.2 m和0.3 m。Based on the quality analysis of raw GPS/BDS data of Xiaomi 8 smartphone,we propose a GPS/BDS positioning stochastic model combining elevation angle and signal-to-noise ratio.The results show that the positioning accuracy of the combined stochastic model is superior to that of the single factor stochastic model in the standard point positioning(SPP).In the single-frequency precise point positioning(PPP)solution model with additional ionospheric and tropospheric constraints,the positioning accuracy and convergence time of the combined model are better than that of the single factor stochastic model,and the positioning accuracy can converge to less than 1 m in 1 minute,the horizontal positioning accuracy is better than 0.5 m in 5 minutes.The positioning accuracy in horizontal direction and elevation direction is better than 0.2 m and 0.3 m,respectively.

关 键 词：Android智能手机 随机模型 单频精密单点定位 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]