使用安卓智能手机的电离层约束单频精密单点定位及全球导航卫星系统观测评估

Ionosphere-Constrained Single-Frequency PPP with an Android Smartphone and Assessment of GNSS Observations.

作者信息

Wang Guangxing, Bo Yadong, Yu Qiang, Li Min, Yin Zhihao, Chen Yu

机构信息

School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China.

GNSS Research Center, Wuhan University, Wuhan 430079, China.

出版信息

Sensors (Basel). 2020 Oct 20;20(20):5917. doi: 10.3390/s20205917.

DOI:10.3390/s20205917

PMID:33092084

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7589309/

Abstract

With the development of Global Navigation Satellite System (GNSS) and the opening of Application Programming Interface (API) of Android terminals, the positioning research of Android terminals has attracted the attention of GNSS community. In this paper, three static experiments were conducted to analyze the raw GNSS observations quality and positioning performances of the smartphones. For the two experimental smartphones, the numbers of visible satellites with dual-frequency signals are unstable and not enough for dual-frequency Precise Point Positioning (PPP) processing all through the day. Therefore, the ionosphere-constrained single-frequency PPP model was employed to improve the positioning with the smartphones, and its performance was evaluated and compared with those of the Single Point Positioning (SPP) and the traditional PPP models. The results show that horizontal positioning accuracies of the smartphones with the improved PPP model are better than 1 m, while those with the SPP and the traditional PPP models are about 2 m.

摘要

随着全球导航卫星系统（GNSS）的发展以及安卓终端应用程序编程接口（API）的开放，安卓终端的定位研究引起了GNSS领域的关注。本文进行了三项静态实验，以分析智能手机的原始GNSS观测质量和定位性能。对于两款实验用智能手机，全天双频信号可见卫星数量不稳定，不足以进行双频精密单点定位（PPP）处理。因此，采用电离层约束单频PPP模型来改进智能手机的定位，并对其性能进行评估，与单点定位（SPP）和传统PPP模型的性能进行比较。结果表明，采用改进后的PPP模型的智能手机水平定位精度优于1米，而采用SPP和传统PPP模型的智能手机水平定位精度约为2米。