Electrical Engineering Department, California State University, Fullerton, CA, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Mar;59(3):497-503. doi: 10.1109/TUFFC.2012.2220.
This paper describes space-based augmentation for global navigation satellite systems (GNSS). Space-based augmentations increase the accuracy and integrity of the GNSS, thereby enhancing users' safety. The corrections for ephemeris, ionospheric delay, and clocks are calculated from reference station measurements of GNSS data in wide-area master stations and broadcast via geostationary earth orbit (GEO) satellites. This paper discusses the clock models, satellite orbit determination, ionospheric delay estimation, multipath mitigation, and GEO uplink subsystem (GUS) as used in the Wide Area Augmentation System developed by the FAA.
本文描述了基于空间的全球导航卫星系统 (GNSS) 增强。基于空间的增强提高了 GNSS 的精度和完整性，从而提高了用户的安全性。通过广域主站对 GNSS 数据的参考站测量计算历书、电离层延迟和时钟的校正，并通过地球同步轨道 (GEO) 卫星广播。本文讨论了 FAA 开发的广域增强系统中使用的时钟模型、卫星轨道确定、电离层延迟估计、多径缓解和 GEO 上行链路子系统 (GUS)。
