GPS衍射误差的小波多分辨分析模型的建立

Establishing wavelet multi-resolution analysis model of GPS diffraction error

信号衍射误差是GPS测量中的主要误差来源,GPS接收机周围的人工物体和山体等是主要的卫星信号衍射体.由于在山区及城镇设立测站是不可避免的,因此通过对观测过程中测站区域的周围环境的不变性建立区域模型,对观测过程中的衍射过程进行模型还原.根据衍射信号的时间和频率特性,建立了一种可以有效消除衍射信号的小波分析解析模型.

The signal diffraction error is the main effect source in GPS survey,and the manmade structure,the mountain massif and some others around GPS receivers are the main diffraction bodies of satellite signals.Area model can be established by observing the unchanging characteristic of surrounding environment in the survey station and put the diffraction process in surveying to original model,because setting up the surevy station in the city areas is inevitable.Based on the time and frequency characteristic of diffraction signal,a wavelet analysis model is eslablished which can effectively eliminate the diffraction signal.