大众智能手机精密定位与结果分析

随着移动互联网的发展与智能手机的普及，大众用户对高精度位置服务的需求日益增加。目前Google公司Android操作系统已开放GNSS原始观测值接口，采用智能手机实现传统适用于专业设备的PPP、RTK等高精度定位成为可能，因此采用原始观测值进行智能手机高精度定位成为研究热点。本文基于协同精密定位服务平台提供的实时轨道、实时钟差与电离层产品信息，实现了智能手机的PPP高精度定位处理。通过实测验证表明：在理想观测条件下，主流智能手机小米8与华为P10实现PPP定位精度水平优于1 m，相对标准伪距单点定位精度分别提高36%和47%。

Precise positioning of smart phones and results analysis

With the development of mobile internet and the popularity of smart phones, the demand for high-precision location based services is increasing. Google Inc announced the possibility to retrieve GNSS raw data from smart phones and tablets equipped with Android Nougat (version 7) operating system or later. Thus, high-precision positioning technology such as PPP and RTK for geodetic receivers will be used for public terminal, such as smart phones. In this paper, we use the real time precise satellite orbit、clock offset and ionosphere correction from collaborative precision positioning service to achieve PPP high-precision positioning of smart phones. Two smart phones, Xiaomi 8 and Huawei P10, are tested to evaluate the performance of PPP, the results show that the horizontal positioning accuracy is better than 1 m under the open sky. Compared with standard single-point positioning, the horizontal accuracy improves 36% and 47%.