利用高次差与自相关函数对周跳探测与处理

Detection and Processing of Carrier Phase Cycle Slips Using High Order Difference and Autocorrelation Function

针对载波相位数据观测过程中,由于接收机内外的原因导致出现周跳,周跳会造成高精度定位不准确,结合高次差和自相关函数的理论,提出一种基于高次差和归一化自相关函数法判断是否出现周跳,对其算法进行介绍、分析和推导,该算法具有较为深厚的理论基础,根据高次差法的特征子序列和归一化自相关函数的相关程度进行探测周跳,通过试验研究结果表明:能有效地探测周跳,判断出周跳的位置,并进行修正,进而提高观测值可靠性和准确性,具有较好的效果。

According to the process of carrier phase data observation,the cycle slip will cause the incorrect of high precision positioning.Combined with the theory of high difference and autocorrelation function,a method based on high difference and autocorrelation function is put forward to judge whether there occur the cycle slip or not,and the method is introduced and analyzed in this paper.This method has a profound theoretical basis,according to the degree of correlation feature of high difference sequence and the normalized autocorrelation function of cycle slip detection,the experimental results show that this method can effectively detect cycle slips and judge slips of the position,so as to improve the reliability and accuracy of observations.