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Open AccessTechnical Note
Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022
by
Pengfei Hu
Pengfei Hu 1
,
Gang Chen
Gang Chen 1,*
,
Chunxiao Yan
Chunxiao Yan 2,
Shaodong Zhang
Shaodong Zhang 1,
Guotao Yang
Guotao Yang 2,
Qiang Zhang
Qiang Zhang 3
,
Wanlin Gong
Wanlin Gong 1 and
Zhiqiu He
Zhiqiu He 1
1
School of Electronic Information, Wuhan University, Wuhan 430072, China
2
State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
3
GNSS Research Center, Wuhan University, Wuhan 430072, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2024, 16(15), 2738; https://doi.org/10.3390/rs16152738 (registering DOI)
Submission received: 16 June 2024
/
Revised: 15 July 2024
/
Accepted: 25 July 2024
/
Published: 26 July 2024
Abstract
The unusual daytime F-region Field-Aligned Irregularities (FAIs) were observed by the HCOPAR and the satellites at low latitudes on 13 June 2022. These irregularities survived from night-time to the following afternoon at 15:00 LT. During daytime, they appeared as fossil structures with low Doppler velocities and narrow spectral widths. These characteristics indicated that they drifted along the magnetic field lines without apparent zonal velocity to low latitudes. Combining the observations of the ICON satellite and the Hainan Digisonde, we derived the movement trails of these daytime irregularities. We attributed their generation to the rapid ascent of the F-layer due to the fluctuation of IMF Bz during the quiet geomagnetic conditions. Subsequently, the influence of the substorm on the low-latitude ionosphere was investigated and simulated. The substorm caused the intense Joule heating that enhanced the southward neutral winds, carrying the neutral compositional disturbances to low latitudes and resulting in a negative storm effect in Southeast Asia. The negative storm formed a low-density circumstance and slowed the dissipation of the daytime FAIs. These results may provide new insights into the generation of post-midnight irregularities and their relationship with daytime fossil structures.
Share and Cite
MDPI and ACS Style
Hu, P.; Chen, G.; Yan, C.; Zhang, S.; Yang, G.; Zhang, Q.; Gong, W.; He, Z.
Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022. Remote Sens. 2024, 16, 2738.
https://doi.org/10.3390/rs16152738
AMA Style
Hu P, Chen G, Yan C, Zhang S, Yang G, Zhang Q, Gong W, He Z.
Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022. Remote Sensing. 2024; 16(15):2738.
https://doi.org/10.3390/rs16152738
Chicago/Turabian Style
Hu, Pengfei, Gang Chen, Chunxiao Yan, Shaodong Zhang, Guotao Yang, Qiang Zhang, Wanlin Gong, and Zhiqiu He.
2024. "Study of the Long-Lasting Daytime Field-Aligned Irregularities in the Low-Latitude F-Region on 13 June 2022" Remote Sensing 16, no. 15: 2738.
https://doi.org/10.3390/rs16152738
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