基于安卓智能手机的GNSS单点定位精度分析OA

Smartphones integrated with Global Navigation Satellite Systems(GNSS)serve as the primary devices for obtaining spatial location in human daily activities,with Single Point Positioning(SPP)being the core technology for real-time GNSS navigation and positioning on these devices.However,the research remains incomplete regarding the SPP performance of the current generation of Android smartphones supporting multi-GNSS in various scenarios,which leads to uncertainties in the optimal selection of satellite systems.Taking the real-time SPP positioning of an Android-based Huawei smartphone as a case study,this paper analyzes GNSS observation quality and positioning performance under different conditions and positioning modes,comparing the results with those of traditional geodetic-grade GNSS receivers.The results indicate that in a static SPP mode,the combination of GPS+BDS yields superior positioning accuracy in open and semi-obstructed environments with favorable observation conditions.In a dynamic SPP mode,when a sufficient number of GPS satellites are available,selecting GPS alone for smartphone SPP positioning is recommended.In cases when the number of GPS satellites is limited,the GPS+BDS combination proves to be the least affected by observation conditions,effectively meeting the majority of users'daily require-ments.