接收机天线姿态对多路径效应的影响研究

为探究GNSS动态精密测量中天线倾斜姿态对卫星信号多路径延迟影响的规律,建立卫星与倾斜天线间的相对位置关系,根据多路径效应综合指标,进行理论分析与实验验证。结果表明,天线姿态发生倾斜时,多路径效应明显增加,有效观测值数量降低,定位精度变差;多路径延迟的大小与天线倾斜方向及角度有关,处于不同方位、高度的卫星信号的多路径延迟具有不同的变化规律。

Influence of Receiver Antenna Attitude on Multipath Effect

In order to explore the influence of antenna tilt attitude on multipath delay of satellite signals, the relative position between satellites and tilt antenna is established. According to the comprehensive index of multipath effect, theoretical analysis and experimental verification are carried out. The results show that when the antenna attitude is tilted, the multipath effect obviously increases, the number of effective observations decreases, and positioning accuracy deteriorates. The multipath delay is related to the tilt direction and angle of the antenna and the multipath of satellite signals in different azimuths and altitudes. Delays have different patterns of variation.