Abstract: 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.

Key words: mobile terminal, BDS+GPS, real-time wide area differential, accuracy analysis