3种GNSS非差数据周跳探测方法的分析

Analysis of Three Detection Methods of Cycle Slips for GNSS Non-difference Data

周跳的探测和修复是获取精确载波相位观测值的关键。本文阐述了周跳探测的意义,介绍并分析高次差法、多项式拟合法和TurboEdit方法如何进行GNSS周跳探测,使用数据对3种方法验证,通过对3种方法所得数据结果分析,观察不同方法差异及适用范围。发现TurboEdit方法可以有效地探测出1周以上的整周跳变,但是无法处理2个频率同时出现周跳的数据;高次差法虽然使用方便,但不适合采样间隔较大的数据,多项式拟合法探测周跳准确性与时间成反比。

The detection and repair of cycle slip is the key to obtain accurate carrier phase observations.This paper expounds the significance of cycle slip detection,introduces and analyzes how to conduct GNSS cycle slip detection by high order time differences,polynomial fitting method and TurboEdit method.It verifies the three methods by using data,and analyzes the data results obtained by the three methods to observe the differences and application scope of different methods.We found that the TurboEdit method can effectively detect the full cycle slip over 1 week,but cannot process the data with cycle slip occurring at both frequencies.Although the high order time differences method is easy to use,it is not suitable for data with large sampling interval.The accuracy of cycle slip detected by polynomial ftting is inversely proportional to time.