海洋环境对GPS多路径效应影响分析

Analysis of the influence of marine environment on GPS multipath effect

为了解海洋环境对GPS多路径效应的影响,基于海边两个测站的观测数据,利用Anubis软件对两测站多年、多天数据在海洋环境与陆地环境下受多路径效应影响的差异进行对比分析。结果表明:(1)低卫星高度角时,随着卫星高度角的降低,海洋环境和陆地环境下的多路径误差都逐渐增大,且海洋环境下的多路径误差增幅明显大于陆地环境下的增幅。(2)当卫星高度角小于20°时,海洋环境下的多路径误差大于陆地环境下的多路径误差;当卫星高度角大于20°时,海面方向和陆地方向多路径误差差异较小。

In order to understand the impact of marine environment and terrestrial environment on GPS multipath effect,Anubis software was used to analyze the multipath error in the marine environment and terrestrial environment based on the observation data of two stations at the seaside.The differences were compared and analyzed.The results show that:(1)When the satellite elevation is low,the multipath error in the marine environment and the terrestrial environment increases gradually with the decrease of the satellite elevation angle,and the multipath error increase in the marine environment is significantly greater than that in the terrestrial environment.(2)When the satellite elevation angle is less than 20°,the multipath error in the marine environment is greater than the multipath error in the terrestrial environment;when the elevation angle is greater than 20°,the difference in the multipath error between the sea surface direction and the land direction is small.