大规模GNSS网发展及数据处理现状

Current Status of Large-scale GNSS Network Development and Data Processing

大规模GNSS网是实现高精度位置服务的重要基础设施。本文从空间段、地面段和数据规模3个方面梳理了大规模GNSS网的发展现状;空间段可用的卫星和频率资源显著增加,地面段GNSS网的规模越来越大,GNSS的数据规模呈指数级趋势倍增。详细总结了海量GNSS数据的存储与管理方法,集中式存储方法已不能满足大规模GNSS网数据存储应用的需要,云存储是一种有效的解决方案。系统归纳了GNSS大网的解算策略,当前主要通过改进模型算法和采用并行计算技术两个途径解决GNSS大网数据解算面临的瓶颈。

Large-scale GNSS network is a critical infrastructure to achieve high-accuracy location service. The current development status of large-scale GNSS network is analyzed from the aspect of space segment,ground segment and data quantity.Available satellites and frequencies increase significantly in the space segment,while the scale of GNSS network is bigger and bigger in the ground segment,and thus the GNSS data quantity increases exponentially.Then,the storage and management method of massive GNSS data are summarized in detail,centralized storage method cannot meet the needs of large-scale GNSS network data storage application,while cloud storage is an effective solution. Finally,the processing strategies of large GNSS network are concluded systematically,and the bottleneck of GNSS data processing is solved by improving model algorithm and using parallel computing technology.