一種GPS的雙頻周跳探測算法

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摘 要：在GPS進(jìn)行觀測時，由于物體遮擋、電離層異樣等因素導(dǎo)致衛(wèi)星信號在短時間內(nèi)出現(xiàn)一種失鎖行為，導(dǎo)致誤差過大，影響定位精度。為了解決這一問題，本研究利用MATLAB軟件，根據(jù)雙頻碼相組合法和電離層殘差法的特點，對GPS載波相位觀測值進(jìn)行周跳探測，結(jié)果表明：此方法可以準(zhǔn)確探測出人為加入的周跳。

關(guān)鍵詞：GPS;MATLAB;電離層殘差法;周跳探測

中圖分類號：P228     文獻(xiàn)標(biāo)志碼：A     文章編號：1003-5168（2022）3-0010-04

DOI：10.19968/j.cnki.hnkj.1003-5168.2022.03.002

A GPS Dual Frequency Cycle Jump Detection Algorithm

ZHU Yunpeng ZHOU Songguang

（1.School of Spatial Information and Surveying engineering， Anhui University of Science and Technology，Huainan 232001，China;2.Zhoukou Municipal Administration Office， Zhoukou 466000，China）

Abstract： During GPS observation， satellite signals show a kind of lock-out behavior in a short period of time due to object occlusion， ionospheric anomalies and other factors， resulting in large errors and affecting positioning accuracy. In order to solve this problem， this paper uses MATLAB software， according to the characteristics of dual frequency code phase group method and ionospheric residual method， to detect the cycle jump of GPS carrier phase observation value， the results show that this method can accurately detect the man-made cycle jump.

Keywords： GPS; MATLAB; ionospheric residual method; cycle slip detection

0 引言

在載波相位觀測中，信號易受到多路徑干擾、物體遮擋、低信噪比等因素的影響，導(dǎo)致接收機(jī)出現(xiàn)接收信號失鎖的現(xiàn)象，從而產(chǎn)生相位觀測值整周跳變，即周跳[1-3]。（剩余3086字）