小波包消噪在Compass电离层三频二阶改正中的应用

摘要

针对Compass电离层二阶改正存在的问题,提出利用小波包分析算法对观测值进行消噪,再进行三频二阶改正的方法.利用Compass仿真数据的试验表明,小波消噪算法能够大大削弱观测噪声,有利于提高Compass三频二阶改正的精度,增强其可行性和有效性.%For taking the problem in Compass two order ionospheric correction, the algorithm of wavelet package de-noising is used to weaken the noises before ionospheric delay correction. Finally, the experiment is made by Compass emulational data and the results show that wavelet packet de-noising method can decrease the observation errors and enhance the feasibility and validity of triple-frequency of two order correction greatly.