[4] [4] FEJIER B G, SCHERLIESS L, DE-PAULA E R. Effects of the vertical plasma drift velocity on the generation and evolution of equatorial spread F[J]. Journal of Geophysical Research A: Space Physics, 1999, 104(A9): 19859-19869. doi: 10.1029/1999JA900271.

[5] [5] HUBA D J, JOYCE G. Global modeling of equatorial plasma bubbles[J]. Geophysical Research Letters, 2010, 37(17): L17104.doi:10.1029/2010GL044281.

[6] [6] WOODMAN R F, LA H C. Radar observations of F-region field-aligned irregularities at the magnetic equator[J]. Journal of Geophysical Research A:Space Physics, 1982,87(A3):1453-1464. doi:10.1029/JA087iA03p01453.

[7] [7] TSUNODA R T. On equatorial spread F:establishing a seeding hypothesis[J]. Journal of Geophysical Research A:Space Physics,2010,115(A12):A12303. doi:10.1029/2010JA015564.

[8] [8] AJITH K K,LI Guozhu,TULASI R S,et al. On the seeding of periodic equatorial plasma bubbles by gravity waves associated with tropical cyclone:a case study[J]. Journal of Geophysical Research A:Space Physics, 2020,125(10):e2020JA028003. doi: 10.1029/2020JA028003.

[9] [9] DAS S K, PATRA A K, KHERANI E A, et al. Relationship between presunset wave structures and interbubble spacing: the seeding perspective of equatorial plasma bubble[J]. Journal of Geophysical Research A: Space Physics, 2020, 125(8): e2020 JA028122. doi:10.1029/2020JA028122.

[10] [10] PATRA K A, CHAITANYA P P, DASHORA N, et al. Highly localized unique electrodynamics and plasma irregularities linked with the 17 March 2015 severe magnetic storm observed using multitechnique common-volume observations from Gadanki,India[J]. Journal of Geophysical Research A:Space Physics, 2016,121(11):11518-11527. doi:10.1002/2016JA023384.

[11] [11] TORRENCE C,COMPO G P. A practical guide to wavelet analysis[J]. American Meteorological Society, 1998,79(1):61-78. https://doi.org/10.1175/1520-0477(1998)0792.0.CO;2.

[12] [12] HECHT J H. Instability layers and airglow imaging[J]. Reviews of Geophysics, 2004,42(1):1-12. doi:10.1029/2003RG000131.

[14] [14] GARCIA F J, TAYLOR M J, KELLEY M C. Two-dimensional spectral analysis of mesospheric airglow image data[J]. Applied Optics, 1997,36(29):7374-7385. doi:10.1364/AO.36.007374.