Carrier frequency disturbance distributions on GPS during equatorial ionospheric scintillation

doi:10.23919/JSEE.2020.000101

Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (6): 1308-1317.doi: 10.23919/JSEE.2020.000101

• CONTROL THEORY AND APPLICATION • Previous Articles Next Articles

Carrier frequency disturbance distributions on GPS during equatorial ionospheric scintillation

Xuefen ZHU^1,*(), Mengying LIN¹(), Xin CHEN²(), Xiyuan CHEN¹

¹ Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
² School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2020-03-03 Online:2020-12-18 Published:2020-12-29
Contact: Xuefen ZHU E-mail:zhuxuefen@seu.edu.cn;230198865@seu.edu.cn;xin.chen@sjtu.edu.cn
About author:|ZHU Xuefen was born in 1983. She received her B.S. degree in instrument science and optoelectronic engineering from Hefei University of Technology, Hefei, China, in 2004, and her M.S. and Ph.D. degrees in navigation, guidance and control engineering from Southeast University, Nanjing, China, in 2006 and 2010, respectively. She used to be a visiting Ph.D. student at the Navigation Signal Analysis and Simulation Group, Istituto Superiore Mario Boella, Turin, Italy, from September 2007 to May 2009. She was a visiting scholar in Department of Aerospace Engineering Science, University of Colorado, Boulder in the United States from October 2015 to October 2016. She has been an associate professor in the School of Instrument Science and Engineering, Southeast University, China, since 2013. Her research interests include GNSS signal processing and GNSS/INS integration technologies. E-mail: zhuxuefen@seu.edu.cn||LIN Mengying was born in 1994. She received her B.S. degree in electrical engineering and automation from Wuhan Institute of Technology, Wuhan, China, in 2017. She is currently an M.D.-Ph.D. in instrument science and technology in Southeast University, Nanjing, China. Her research interests include interference detection on satellites’ signals and GNSS signal processing tech-nologies. E-mail: 230198865@seu.edu.cn||CHEN Xin was born in 1982. He received his Ph.D. degree in electronic and communication system from Politecnico di Torino, Italy. He is an associate professor with the School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, China. His research topic covers multipath channel modeling and mitigation, multi-sensor fusion positioning, and software receiver design. E-mail: xin.chen@sjtu.edu.cn||CHEN Xiyuan was born in 1962. He received his Ph.D. degree from Southeast University, Nanjing, China, in 1998. He is currently a professor with the School of Instrument Science and Engineering, Southeast University. From October 2005 to September 2006, he was with the Department of Electronic Engineering, Politecnico di Torino, Italy, as a visiting scholar. He has authored or co-authored more than 200 papers and 60 granted patents. His research interests include fiber optic sensors, inertial navigation, GNSS software receiver, wireless location technologies, integrated navigation, and related application. E-mail: chxiyuan@seu.edu.cn
Supported by:
This work was supported by the National Key Research and Development Plan of China (2018YFB0505103), the National Natural Science Foundation of China (61873064) and the Science and Technology Project of State Grid Corporation of China (SGSHJX00KXJS1901531)

Abstract

Abstract:

In the equatorial region, deep amplitude fading in global positioning system (GPS) signals frequently occurs during the strong ionospheric scintillation, it can lead to the loss of lock in GPS carrier tracking loops, and result in increased positioning error and even navigation interruption. The relationships between amplitude scintillation indices and detrended carrier frequency are investigated, based on GPS L1 C/A signals during the last peak of the solar cycle at the low latitude site of S?o José dos Campos, Brazil (23.2S, 45.9W) from 2013 to 2015. Corresponding mathematic model of the probability distribution function is built for the first time to provide statistical analysis on the above relationships. The results show that the standard carrier frequencies reveal an almost linear relation with the amplitude scintillation indices. Moreover, the frequency widths of detrended frequency are proportional to levels of amplitude scintillation when the value of the peak probability is lower than the corresponding boundary. A conclusion can be drawn that different levels of amplitude scintillation will influence the fluctuation of the carrier frequency. The analysis will provide useful guidance to set the receiver’s bandwidth with respect to the different scintillation levels and design the advanced tracking algorithms to improve the robustness and precision of the GPS receiver.

Key words: ionospheric scintillation, carrier frequency dis-turbance, probability distribution, bandwidth

Xuefen ZHU, Mengying LIN, Xin CHEN, Xiyuan CHEN. Carrier frequency disturbance distributions on GPS during equatorial ionospheric scintillation[J]. Journal of Systems Engineering and Electronics, 2020, 31(6): 1308-1317.

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References 22

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Date	Collecting time (h:min:s)	PRNs collected	PRNs available
11/18/2013	01:00:01?02:00:01	5 12 15 18 21 25 29 31	18 21 25 29
02/27/2014	01:00:03?02:00:03	1 3 6 11 14 19 20 22 23 27 30 31 32	1 11 31 32
01/31/2015	01:00:19?02:00:19	1 4 11 14 19 22 27 31 32	4 11 19 31

Gaussian fitting	One term		Two terms
Fitting effect	R-square	RMSE	R-square	RMSE
11/18/2013 PRN25	0.9731	10.6990	0.9844	8.3575
02/27/2014 PRN31	0.9791	10.6824	0.9903	7.4531
01/31/2015 PRN19	0.9856	7.6633	0.9878	7.2531

Fitting effect	Collecting date
	11/18/2013		02/27/2014		01/31/2015
	R-square	RMSE	R-square	RMSE	R-square	RMSE
S4≤0.2	0.9906	0.0010	0.9714	0.0019	0.9801	0.0015
0.2<S4≤0.5	0.9834	0.0013	0.9863	0.0012	0.9868	0.0011
0.5<S4≤0.8	0.9671	0.0017	0.9793	0.0014	0.9636	0.0017
S4>0.8	0.9252	0.0022	0.9477	0.0020	0.9106	0.0023

Data collecting date	Peak probability boundary	Frequency width on S4Bins/Hz
Data collecting date	Peak probability boundary	S4≤0.2	0.2<S4≤0.5	0.5<S4≤0.8	S4>0.8
11/18/2013	0.008 0	4.27	4.27	4.28	4.41
	0.003	5.59	5.90	6.50	7.45
	0.002	6.05	6.59	7.33	8.61
	0.001	6.75	7.72	8.42	10.33
02/27/2014	0.004 5	5.05	5.05	5.54	5.97
	0.003	5.57	5.60	6.30	7.07
	0.002	6.05	6.14	6.99	8.07
	0.001	6.79	7.13	8.02	9.56
01/31/2015	0.008 7	4.16	4.27	4.27	4.36
	0.003	5.83	6.10	6.34	7.69
	0.002	6.33	6.69	7.41	8.82
	0.001	7.10	7.55	8.98	10.51

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Carrier frequency disturbance distributions on GPS during equatorial ionospheric scintillation

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