本文介绍了星基增强系统产生的背景以及美国的星基增强系统WAAS(广域增强系统)的系统架构,回顾了WAAS(广域增强系统)的发展历史,分析了WAAS(广域增强系统)的发展现状和未来的发展方向。%This article introduces the background of the U.S. Satellite Based Augmentation System (SBAS) and the system architecture of SBAS WAAS (Wide Area Augmentation System), reviews the development process of WAAS and makes analysis about the current situation and future development of WAAS.
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