Android平台下实时BDS+GPS双系统广域差分定位技术研究

随着智能手机的普及，基于移动智能终端的位置服务应用正在飞速扩张。Android智能终端，因其性价比高而占据了大多数用户市场，但定位精度有待提升。因此，利用广域差分增强技术，提升室内外位置服务精度，成为当前研究热点。本文利用Android studio 2.2.2平台、Java语言及JNI技术，开发了BDS+GPS广域差分定位软件，该软件通过串口读取北斗移动终端原始卫星观测数据，进行差分数据流解析、实时轨道和钟差改正并实现增强定位。在移动终端硬件平台上，运行BDS+GPS实时WAAS软件，分析了定位结果，双系统单频广域定位精度为4 m左右，对于GNSS卫星技术在低成本移动终端位置服务中具有重要应用价值。

Research on Real-time BDS+GPS Dual Systems Wide Area Differential Location Technology Based Android Platform

With the popularity of smart phones , location service applications based on mobile intelligent terminals are rapidly expanding .Android intelligent terminal occupies because of its high cost performance and the majority of the user market , but its positioning accuracy needs to upgrade .Therefore,the usage of wide area differential augmentation technology to improve the accuracy of indoor and outdoor location services ,has become the current research hotspot .This paper uses the Android studio 2.2.2 platform,Java and JNI technology to develop the BDS+GPS wide area differential positioning software ,the software reads satellite observation data of the original BeiDou mobile terminal , analyzes the difference data flow correct real-time orbit and clock , to achieve augmentation positioning through the serial port .In the mobile terminal hardware platform ,we run real-time BDS+GPS WAAS software,analyze the positioning results.Single frequency positioning accuracy of double wide area system is 4 meters,and it has important application value in GNSS satellite technology in low cost mobile terminal location service .