Multi-Level High Precision LBS Architecture Based on GNSS CORS Network, A Case Study of HNCORS

With the rapid development of the ground infrastructure as CORS and mobile communication stations, the high precision LBS expand from the limited fields to the public. The comprehensive LBS platforms which meet the demands such as multi-precision level, massive user and desirable scalability, become critical for the public applications. In this paper, a new high precision LBS architecture based on GNSS CORS network is presented. The platform is deployed in the cloud computational environment. It is divided into two parts: data processing and allocation system individually. The virtual grids differential corrections are involved to optimize the real-time CORS stations data processing. Besides, the API/SDK module is introduced as a new service mode, which integrates the meter, decimeter, centimeter level LBS applications, respectively realized by the coordinates, pseudo range and carrier phase differential. With the daily needs of HNCORS network, the platform “SoBDS” is established. The experiments for decimeter level example shows that, the platform could support one million users, and it is compatible and scalable. The real-time positioning accuracy is ±0.425m and ±0.436m in east and north. The total accuracy is ±0.612m and ±0.773m in horizontal and vertical direction.