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为了突破国外产品对CORS核心技术的垄断,自主研制了拥有自主知识产权的GNSS网络增强综合服务系统,并投入工程应用。为了确保该系统的准确性、可靠性和稳定性,研究了系统时间和空间可用性、精度、定位时效性、用户接收机兼容性、荷载等主要性能指标的测试方法。系统经过工程应用及测试表明,其空间和时间可用性超过95%,WGS-84高斯平面内符合精度x、y、h方向分别为0.008m、0.004m、0.011m,国家2000平面坐标系x、y方向的外符合分别为0.027m、0.025m,平均初始化时间为21s,可以兼容天宝、南方、中海达等国内外主流GNSS产品,用户有效荷载数达到30个,其总体性能与GPSNet相当,满足国家CORS建设规范要求。
In order to break the monopoly of CORS core technology of foreign products, the GNSS network enhanced integrated service system with independent intellectual property rights has been independently developed and put into engineering application. In order to ensure the accuracy, reliability and stability of the system, the test methods such as system time and space availability, accuracy, positioning timeliness, user receiver compatibility, load and other key performance indicators are studied. After engineering application and testing, the system has more than 95% space and time availability. The accuracy of WGS-84 Gaussian plane is 0.008m, 0.004m and 0.011m respectively. The national 2000 plane coordinate system x, y Direction of the external compliance were 0.027m, 0.025m, the average initialization time of 21s, compatible with Tianbao, South, Haida and other major GNSS products at home and abroad, the user number of payloads up to 30, its overall performance and GPSNet considerable to meet the national CORS construction code requirements.