基于智能手机双频全球导航卫星系统观测的精确点位定位

Precise Point Positioning Using Dual-Frequency GNSS Observations on Smartphone.

作者信息

Wu Qiong, Sun Mengfei, Zhou Changjie, Zhang Peng

机构信息

College of Geo-Exploration Science and Technology, Jilin University, Changchun 130000, China.

出版信息

Sensors (Basel). 2019 May 11;19(9):2189. doi: 10.3390/s19092189.

DOI:10.3390/s19092189

PMID:31083567

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6539034/

Abstract

The update of the Android system and the emergence of the dual-frequency GNSS chips enable smartphones to acquire dual-frequency GNSS observations. In this paper, the GPS L1/L5 and Galileo E1/E5a dual-frequency PPP (precise point positioning) algorithm based on RTKLIB and GAMP was applied to analyze the positioning performance of the Xiaomi Mi 8 dual-frequency smartphone in static and kinematic modes. The results showed that in the static mode, the RMS position errors of the dual-frequency smartphone PPP solutions in the E, N, and U directions were 21.8 cm, 4.1 cm, and 11.0 cm, respectively, after convergence to 1 m within 102 min. The PPP of dual-frequency smartphone showed similar accuracy with geodetic receiver in single-frequency mode, while geodetic receiver in dual-frequency mode has higher accuracy. In the kinematic mode, the positioning track of the smartphone dual-frequency data had severe fluctuations, the positioning tracks derived from the smartphone and the geodetic receiver showed approximately difference of 3-5 m.

摘要

安卓系统的更新以及双频全球导航卫星系统（GNSS）芯片的出现，使得智能手机能够获取双频GNSS观测数据。本文基于RTKLIB和GAMP应用了GPS L1/L5和伽利略E1/E5a双频精密单点定位（PPP）算法，来分析小米8双频智能手机在静态和动态模式下的定位性能。结果表明，在静态模式下，双频智能手机PPP解在东、北和天向的均方根位置误差分别为21.8厘米、4.1厘米和11.0厘米，在102分钟内收敛至1米以内。双频智能手机的PPP在单频模式下与大地测量接收机具有相似的精度，而双频模式下的大地测量接收机具有更高的精度。在动态模式下，智能手机双频数据的定位轨迹有严重波动，智能手机和大地测量接收机得出的定位轨迹显示大约相差3至5米。