Abstract:

In order to meet the demand of large-scale high-precision location services in the field of GNSS mass applications, this paper proposes a CORS-based construction method for differentiated positioning cloud service based on CORS. It solves the problems of traditional CORS service such as large data base security risks and limited number of concurrent user accesses by using the virtual grid to generate the form of correction and designing a cloud service model of solution server and business server separating. It also provides applications and services to users and developers using APIs and SDKs, reducing the threshold for high-precision location services. At the same time, relying on the research results of this paper, based on the Hunan location service platform (HNCORS), designs and implements CORS-based GNSS differentiated positioning cloud service architecture. And to packet loss rate, external meet the accuracy, high concurrent access as an indicator for testing, the results show that the cloud service architecture designed in this paper has good accuracy, stability and reliability, and has good application prospect in high-precision location service applications. It can also be a high-precision location service cloud platform of other provincial CORS networks construction to provide technical reference.

Key words: CORS, differential positioning, virtual grid, sub-meter level, cloud service, high-precision location service