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局域增强系统

局部定位系统结构。

局域增强系统Local Area Augmentation System,简称LAAS)是一种能够在局部区域内提供高精度GPS定位的一种定位增强系统。其原理与广域增强系统(WAAS)类似,只是用地面的基准站代替了WAAS中的地球同步卫星,通过这些基准站向用户发送测距信号和差分改正信息。因此这些基准站被称为地基伪卫星。LAAS系统能够在局部地区提供比WAAS精度更高的定位信号,因此用于机场导航,可以使飞机仅仅利用GPS就可以安全着陆。

参看

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参考文献

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  • 李征航 黄劲松. GPS测量与数据处理 (M) 1. 武汉: 武汉大学出版社. 2005: 127. ISBN 978-7-307-04443-2. 
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局域增强系统
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