Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer

doi:10.3390/rs12132129

	Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer
	Yang, Haiyan1,2,3 ; Yang, Xuhai 1,2,3,4; Zhang, Zhe 1,2,3; Sun, Baoqi 1,2,3,4; Qin, Weijin 1,2,3
	2020-07-01
发表期刊	REMOTE SENSING
卷号	12 期号:13 页码:19
摘要	In high-precision GPS precise point positioning (PPP) time transfer, errors caused by the effect of ionosphere delay have to be corrected. Usually the ionosphere-free combinations of the pseudo code and the carrier phase is used in GPS PPP data processing, and it effectively eliminates the effect of the first-order ionospheric delay. This study quantitatively analyzes the errors caused by higher-order ionospheric (Ion2+) delays in precise PPP time transfer. Data of two 7-day test periods, including low and moderate ionospheric conditions, from 20 stations located in middle- and low-latitude, were analyzed. The difference in clock solution with and without the Ion2+ correction, including the receiver clock solution and time-link clock solution, was deeply analyzed and discussed. The difference sequence shows a constant bias plus some variations with a diurnal variation. For the difference of the receiver clock solutions, the mean standard deviation of the variations is 3.92 ps in low-latitude, which is much larger than that of 2.59 ps in mid-latitude due to the influence of the larger ionospheric electron density on the low-latitude. The maximum constant bias reached more than 15 ps and was negative at most stations in the northern hemisphere, while it was positive at most stations located in the southern hemisphere. The difference in the time-link solutions correlates not only with time and region, but also with the length of the time-links. The largest difference in the long time-link SYDN-PTBB, BJNM-SYDN, AMC2-SYDN, etc., reaches more than 25 ps, while that of the short time-link IENG-PTBB, BRUX-PTBB, etc., is less than 3.5 ps. Therefore, the Ion2+ correction is necessary for high-precision PPP time transfer over long time-links, especially time-links made by one station located in the northern hemisphere and another located in the south hemisphere; however, it could be ignored for short time-links.
关键词	GPS precise point positioning (PPP) higher-order ionospheric delay receiver clock time transfer
资助者	CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI	10.3390/rs12132129
关键词[WOS]	PPP
语种	英语
资助项目	CAS "Light of West China" Program[XAB2017B11] ; CAS "Light of West China" Program[Y915YR1801] ; National Natural Science Foundation of China[11703033]
资助者	CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向	Remote Sensing
WOS类目	Remote Sensing
WOS记录号	WOS:000550806500001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/9245
专题	高精度时间传递与精密测定轨研究室
通讯作者	Yang, Haiyan
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Chinese Acad Sci, Key Lab Precis Nav & Timing Technol, Xian 710600, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Haiyan,Yang, Xuhai,Zhang, Zhe,et al. Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer[J]. REMOTE SENSING,2020,12(13):19.
APA	Yang, Haiyan,Yang, Xuhai,Zhang, Zhe,Sun, Baoqi,&Qin, Weijin.(2020).Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer.REMOTE SENSING,12(13),19.
MLA	Yang, Haiyan,et al."Evaluation of the Effect of Higher-Order Ionospheric Delay on GPS Precise Point Positioning Time Transfer".REMOTE SENSING 12.13(2020):19.