Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020

This paper takes the annular solar eclipse that occurred in China on June 21, 2020, as the background and conducts tests and analysis of shortwave timing sky wave signals. The test group continuously tested the signal field strength data from June 20, 2020, to June 23, 2020. The results show that th...

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Autores principales:	Luxi Huang, Changhong Liu, Yingming Chen, Xin Wang, Ping Feng, Xiaohui Li
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/7856f54ba4c34805a1cc22a4e4046a3f
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spelling	oai:doaj.org-article:7856f54ba4c34805a1cc22a4e4046a3f2021-12-01T18:52:06ZObservations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 20202158-322610.1063/5.0068778https://doaj.org/article/7856f54ba4c34805a1cc22a4e4046a3f2021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0068778https://doaj.org/toc/2158-3226This paper takes the annular solar eclipse that occurred in China on June 21, 2020, as the background and conducts tests and analysis of shortwave timing sky wave signals. The test group continuously tested the signal field strength data from June 20, 2020, to June 23, 2020. The results show that the shortwave signal field strength on June 21, the day of the annular eclipse, is significantly weaker than that on two other days—before and during the annular eclipse—and there are three obvious jumps in the field strength value. (1) The first jump occurs more than one hour before the annular eclipse, and then, the field strength has an oscillatory attenuation. Between the first jump and the second jump, the overall change trend of the field strength value is an oscillatory decline one. (2) About 25 min before the beginning of the eclipse, the second jump of the field strength occurs; from the second jump to the third jump, that is, before the occurrence of the beginning of the eclipse and the transition phase from the beginning to the middle of the eclipse, the value of the field strength has an oscillatory increase. (3) During the period of 8:00–8:10, the field strength shows a third jump. Although the field strength oscillates after the third jump, it has no obvious increasing or decreasing trend. Based on the results of previous studies on the annular eclipse on that day and the analysis of the theoretical model of radio wave propagation, this paper preliminarily considers that the change in signal field strength is supposed to be caused by the impact of the outbreak of the annular eclipse on the ionosphere. When the annular eclipse occurred, the sunlight reaching the ground is blocked by the Moon, and the ionization degree of electrons in the ionosphere is reduced, resulting in an increase in the penetration factor, and the overall performance of the shortwave signal reaching the ground is weakened.Luxi HuangChanghong LiuYingming ChenXin WangPing FengXiaohui LiAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115317-115317-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Luxi Huang Changhong Liu Yingming Chen Xin Wang Ping Feng Xiaohui Li Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
description	This paper takes the annular solar eclipse that occurred in China on June 21, 2020, as the background and conducts tests and analysis of shortwave timing sky wave signals. The test group continuously tested the signal field strength data from June 20, 2020, to June 23, 2020. The results show that the shortwave signal field strength on June 21, the day of the annular eclipse, is significantly weaker than that on two other days—before and during the annular eclipse—and there are three obvious jumps in the field strength value. (1) The first jump occurs more than one hour before the annular eclipse, and then, the field strength has an oscillatory attenuation. Between the first jump and the second jump, the overall change trend of the field strength value is an oscillatory decline one. (2) About 25 min before the beginning of the eclipse, the second jump of the field strength occurs; from the second jump to the third jump, that is, before the occurrence of the beginning of the eclipse and the transition phase from the beginning to the middle of the eclipse, the value of the field strength has an oscillatory increase. (3) During the period of 8:00–8:10, the field strength shows a third jump. Although the field strength oscillates after the third jump, it has no obvious increasing or decreasing trend. Based on the results of previous studies on the annular eclipse on that day and the analysis of the theoretical model of radio wave propagation, this paper preliminarily considers that the change in signal field strength is supposed to be caused by the impact of the outbreak of the annular eclipse on the ionosphere. When the annular eclipse occurred, the sunlight reaching the ground is blocked by the Moon, and the ionization degree of electrons in the ionosphere is reduced, resulting in an increase in the penetration factor, and the overall performance of the shortwave signal reaching the ground is weakened.
format	article
author	Luxi Huang Changhong Liu Yingming Chen Xin Wang Ping Feng Xiaohui Li
author_facet	Luxi Huang Changhong Liu Yingming Chen Xin Wang Ping Feng Xiaohui Li
author_sort	Luxi Huang
title	Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
title_short	Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
title_full	Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
title_fullStr	Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
title_full_unstemmed	Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020
title_sort	observations and analysis of the impact of annular eclipse on 10 mhz short-wave signal in sanya area on june 21, 2020
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/7856f54ba4c34805a1cc22a4e4046a3f
work_keys_str_mv	AT luxihuang observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020 AT changhongliu observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020 AT yingmingchen observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020 AT xinwang observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020 AT pingfeng observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020 AT xiaohuili observationsandanalysisoftheimpactofannulareclipseon10mhzshortwavesignalinsanyaareaonjune212020
_version_	1718404699974008832

Observations and analysis of the impact of annular eclipse on 10 MHz short-wave signal in Sanya area on June 21, 2020

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