WAAS技术现状与发展  

The Current Status and Development of WAAS Technique

作　　者：宋炜琳[1] 谭述森[2] 

机构地区：[1]中科院研究生院 [2]中国人民解放军61081部队

出　　处：《无线电工程》2007年第6期50-52,共3页Radio Engineering

摘　　要：卫星导航广域增强系统的主要目的是提高卫星导航系统定位精度、完好性和增强服务区域。系统特点是较局域差分、局域增强系统的差分定位精度相对较差,但也能大幅度提高卫星导航系统的定位精度,服务范围广、不受距离限制,可满足大部分用户的使用需求。典型的系统为美国的WAAS系统。WAAS系统共由3个主站(兼参考站)、25个参考站、1个上行注入站和1颗地球同步卫星组成,覆盖北美和墨西哥周边地区,目前已投入使用。Wide-area augmentation system can improve the position accuracy and integrity of satellite navigation system and also augment the service area where signals are received. Although the effect is not better than that of local-area augmentation system,the system can meet requirements of a majority of users. The typical system is WAAS in USA. WAAS that consists of three master stations and twenty-five reference stations and one ground uplink upload station and also one geostationary satellite, provides signals in North America and the surrounding area of Mexico.

关 键 词：卫星导航 WAAS 差分定位 完好性 

分 类 号：TN967.1[电子电信—信号与信息处理]