北斗高精度跨区域定位服务"一张网"构建与实现OA

In order to solve the problems of insufficient sharing,independence and non-uniform platform of satellite precision positioning services in the fields of natural resources in Shaanxi,Gansu,Ningxia and Shanxi,based on the resources of satellite navigation and positioning reference stations in those four provinces of Shaanxi,Gansu,Ningxia and Shanxi,this study proposes a system architecture of"one network,multi-center and one platform"is proposed.On the premise of not changing the existing computing and broadcasting services in each province,by studying the dynamic differential scheduling algorithm model,the cross-regional seamless non-inductive roaming technology is developed,and the BeiDou high-precision cross-regional positioning service"one network"system is constructed to realize the cross-regional automatic scheduling of high-precision positioning.The results show that the internal coincidence accuracy of network RTK fixed-point test at the junction of Shaanxi,Gansu,Ningxia and Shanxi Provinces is better than 1 cm in North,East and Up directions,and the external coincidence accuracy is better than 3 cm,2 cm and 5 cm in North,East and Up directions,respectively.The fixed rate of vehicle dynamic positioning in difficult environment is better than 64％,the dynamic account association delay is better than 78 ms,the fixed rate in general environment is better than 75％,and the dynamic account association delay is better than 47 ms.The inter-provincial dynamic positioning service switching is smooth,and the average delay is less than 50 ms,which can meet the high-precision positioning service requirements of most users.The research conclusions provide a technical reference for the construction of a national BeiDou high-precision positioning service'one network'in the field of natural resources.