智能手机GNSS数据质量分析与随机模型建立  

Smartphone GNSS Data Quality Analysis and Stochastic Model Establishment

作　　者：赵兴旺[1] 陶安迪 陈健[1] 刘超[1] 程茂原 ZHAO Xingwang;TAO Andi;CHEN Jian;LIU Chao;CHENG Maoyuan(School of Spatial Information and Geomatics Engineering,Anhui University of Science and Technology,Huainan 232001,China;School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]安徽理工大学空间信息与测绘工程学院,安徽省淮南市232001 [2]河海大学地球科学与工程学院,南京市211100

出　　处：《大地测量与地球动力学》2024年第7期661-666,共6页Journal of Geodesy and Geodynamics

基　　金：安徽省自然科学基金(2208085MD101,2108085QD171);安徽省高校自然科学研究重点项目(KJ2021A0443);安徽理工大学研究生创新基金(2022CX2165)。

摘　　要：为提高移动智能终端定位精度,利用小米8和华为Mate20手机采集多个卫星系统的观测数据并进行质量分析,通过不同卫星系统的伪距残差分别对信噪比模型参数进行估计,最后进行静态伪距单点定位实验。结果表明,手机端观测的BDS和GPS伪距精度接近,且高于GLONASS;相较于高度角,伪距残差与信噪比的相关性更强;在信噪比模型参数估计中,小米8拟合效果优于华为Mate20,BDS拟合效果差于其他卫星系统;参数拟合后的信噪比模型在水平和高程方向的定位精度分别为2.37 m和8.38 m,相较于高度角模型,定位精度提升约10%。To improve the positioning accuracy of mobile intelligent terminals,we analyze the observation data of multiple satellite systems collected by Xiaomi Mi8 and Huawei Mate20 smartphones,estimate the parameters of signal-to-noise ratio model based on pseudorange residuals of different satellite systems,and finally carry out the static pseudorange single-point positioning experiment.The results show that the pseudorange accuracy of BDS and GPS observed on mobile phones is close to each other and is higher than that of GLONASS.The correlation between pseudorange residual and SNR is stronger compared to elevation angle.In the parameter estimation of SNR model,the fitting effect of Xiaomi Mi8 is better than that of Huawei Mate20.The fitting effect of BDS is worse than that of other satellite systems,and the horizontal positioning and elevation positioning accuracy of SNR model after parameter fitting are 2.37 meter and 8.38 meter,respectively,which is about 10%higher than that of elevation model.

关 键 词：智能手机 数据质量分析 信噪比模型 参数拟合 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]