智能手机RTK定位软件实现及应用试验

随着芯片技术的发展，智能手机已成为使用最普遍的一类全球卫星导航系统(GNSS)设备，其提供位置服务的能力逐步彰显.为探究将手机作为专业GNSS设备的可行性，利用谷歌开放Android智能终端GNSS原始观测数据这一契机，设计并实现一款手机实时动态(RTK)定位手机应用程序(APP)，并基于该APP开展高精度定位应用试验.结果表明：在静态条件下，手机RTK定位精度约达1 dm；在行人和车载动态条件下，可达平面亚米级、高程1～2 m的精度水平，RTK定位精度远高于内置芯片解，但稳定性略差于芯片解.使用手机模拟RTK点测量，其平面精度约达1 m，基本满足地理信息采集和调查等亚米级到米级低精度专业应用的需求.

Realization and application testing of real-time kinematic on smartphone

With the development of chip technology, the smartphone has become the most widely used Global Navigation Satellite System (GNSS) device, and its ability to provide location services is gradually being demonstrated. To investigate the feasibility of using a smartphone as a professional GNSS device and to take advantage of the opportunity of opening GNSS raw measurements on an Android smart terminal, an real-time kinematic (RTK) positioning APP was designed and implemented, and a high-precision positioning application test was performed based on it. The results show that the APP's real-time positioning accuracy can achieve about 1 dm under static conditions, and can reach sub-meter levels in plane and 1 to 2 m in vertical under dynamic situations of pedestrians and automobiles. The RTK positioning accuracy is significantly higher than that of the built-in chip solution, but the stability is slightly worse. The results also show that when using a smartphone to imitate RTK point measurement, the plane accuracy can reach about 1 m, which is sufficient for sub-meter to meter-level low-precision professional applications such as geographic information collecting and survey.