摘要
本文提出了一种GPS卫星导航增强系统技术性能分析方法,即利用IGS提供的高精度GPS星历、卫星钟差数据和电离层数据作为外符和检测标准,检验增强系统提供的卫星星历改正数据、卫星钟差改正数据和电离层改正数据的精度。通过实测数据分析表明,我国GPS卫星导航增强系统目前的服务性能与国外同类系统具有一定的差距,主要的技术薄弱环节在于GPS卫星的精密定轨与钟差解算技术。
A method to evaluate the performance of GPS wide area augment system is introduced in this article. By it, the performance of the Chinese GPS WAAS, so called SNAS, is examined. And more, the acem＇aeies of GPS broadcast ephemeris, clock data and ionosphere delay corrected by the SNAS broadcast correetirtg data can be solved clearly in compari- son with the high precise GPS ephemeris, GPS satellites clocks data from IGS, and the high precise global ionosphere delay correcting model frown CODE. The facts show that the service performance of SNAS has dropped behind EGNOS, and the main weakness lies in the technologies of the precise orbit determination and the satellites clocks solvation.
出处
《四川测绘》
2006年第2期55-59,共5页
Surveying and Mapping of Sichuan
