基于CORS的分米级GNSS差分定位云服务研究

面向GNSS大众应用领域海量高精度位置服务需求，提出了一种基于CORS的分米级差分定位云服务建设方法，采用虚拟格网用户生成改正数的形式，通过设计解算服务器与业务服务器分离的云服务模式，解决了传统CORS服务中基准站数据安全风险大、用户并发访问数量受限的问题，并以API和SDK形式面向用户和开发者提供应用服务，降低了高精度位置服务专业技术门槛。同时，依托本文研究成果，基于湖南省位置服务平台（HNCORS），设计并实现了基于CORS的分米级GNSS差分定位云服务架构，并以丢包率、外符合精度、高并发访问为指标进行测试。结果表明，本文设计的云服务架构具有较好的精度、稳定性和可靠性，在高精度位置服务应用中具有较好的应用前景，也可为其他省级CORS网的高精度位置服务云平台建设提供技术参考。

Research of sub-meter GNSS differential location cloud service based on CORS

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.