摘要
信号衍射是GPS结构变形监测的重要误差源之一。GPS天线周围的建筑物是常见的信号衍射体。针对在变形监测中观测环境相对固定之特点,提出一种基于环境模型的衍射误差建模算法。若干试验表明所提方法能有效检测并削弱衍射误差对变形监测结果的影响。
GPS signal diffractions caused by objects such as building structures surrounding a GPS antenna can introduce significant errors in applications such as deformation monitoring. This paper presents an approach for modelling and mitigating errors caused by GPS signal diffractions by considering the fact that the geometry relating the GPS satellites, the antenna and objects that diffract GPS signals does not change significantly between sidereal days. Test results show that the proposed method is effective and can significantly reduce GPS diffraction errors.
出处
《测绘学报》
EI
CSCD
北大核心
2005年第4期283-287,共5页
Acta Geodaetica et Cartographica Sinica
基金
香港理工大学基金(A222)
教育部留学回国人员科研启动基金资助项目(2003)
关键词
衍射
变形监测
环境建模
Diffraction
deformation monitoring
environment based modelling
