Regularities of the midlatitude spread F occurrence probability during sunrises and sunsets

被引：0
|
作者：
Deminov, MG [1 ]
Nepomnyashchaya, EV [1 ]
Sitnov, YS [1 ]
机构：
[1] Russian Acad Sci, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk 142190, Moscow Oblast, Russia
来源：
GEOMAGNETISM AND AERONOMY | 2005年 / 45卷 / 04期
关键词：
D O I：
暂无
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The regularities of a change in the spread F occurrence probability (P) during the sunrises and sunsets have been analyzed based on data of Moscow station for low (1975, 1976, and 1985) and high (1979-198 1) solar activity. It has been obtained that additional (morning and evening) P maximums are observed only in winter before the sunrise and after the sunset over this station, when the magnetically conjugate ionosphere is sunlit. The appearance of these maximums is apparently related to heating of the ionosphere by photoelectrons from the conjugate hemisphere. It has been established that the evening and morning boundaries of the spread F observation interval almost coincide with the instants of sunset and sunrise over this station at low solar activity. At high solar activity, the spread F observation interval shifts toward increased local times. In such a case, the evening, boundary of this interval shifts in winter, and the morning boundary is displaced in summer and during equinoxes. As a result, the morning boundary of this interval is sunlit in the ionosphere. The established regularities are qualitatively interpreted.
引用
收藏
页码：458 / 465
页数：8
相关论文
共 50 条
  • [21] WEAK DAYTIME SPREAD-F SIGNALS FROM THE MIDLATITUDE IONOSPHERE
    BOWMAN, GG
    HAINSWORTH, DW
    ANNALES GEOPHYSICAE SERIES A-UPPER ATMOSPHERE AND SPACE SCIENCES, 1987, 5 (03): : 127 - 132
  • [22] EQUATORIAL PROPAGATION AND THE OCCURRENCE OF SPREAD F.
    Cole, D.G.
    McNamara, L.F.
    Proceedings of the IREE Australia (Institution of Radio and Electronics Engineers), 1975, 36 (03): : 39 - 43
  • [23] PATCHY OCCURRENCE OF EQUATORIAL SPREAD-F
    SASTRI, JH
    ANNALES GEOPHYSICAE, 1985, 3 (05): : 589 - 592
  • [24] FRONTAL AND NON-FRONTAL CHARACTERISTICS OF MIDLATITUDE SPREAD-F STRUCTURES
    BOWMAN, GG
    INDIAN JOURNAL OF RADIO & SPACE PHYSICS, 1990, 19 (02): : 62 - 68
  • [25] Spread F in the Midlatitude Ionosphere According to DPS-4 Ionosonde Data
    V. A. Panchenko
    V. A. Telegin
    V. G. Vorob’ev
    G. A. Zhbankov
    O. I. Yagodkina
    V. I. Rozhdestvenskaya
    Geomagnetism and Aeronomy, 2018, 58 : 229 - 236
  • [26] SMALL-SCALE IONOSPHERIC STRUCTURES ASSOCIATED WITH MIDLATITUDE SPREAD-F
    BOWMAN, GG
    HAJKOWICZ, LA
    JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1991, 53 (05): : 447 - 457
  • [27] Ground-based and space borne studies of midlatitude F-spread
    Alimov, V.A.
    Tokarev, Yu.V.
    Bougeret, G.
    Kaiser, M.
    Boiko, G.N.
    Vybornov, F.I.
    Karashtin, A.N.
    Komrakov, G.P.
    Rakhlin, A.V.
    Izvestiya Vysshikh Uchebnykh Zavedenij. Radiofizika, 2000, 43 (09): : 755 - 766
  • [28] Spread F in the Midlatitude Ionosphere According to DPS-4 Ionosonde Data
    Panchenko, V. A.
    Telegin, V. A.
    Vorob'ev, V. G.
    Zhbankov, G. A.
    Yagodkina, O. I.
    Rozhdestvenskaya, V. I.
    GEOMAGNETISM AND AERONOMY, 2018, 58 (02) : 229 - 236
  • [29] NIGHTTIME MIDLATITUDE TRAVELING IONOSPHERIC DISTURBANCES ASSOCIATED WITH MILD SPREAD-F CONDITIONS
    BOWMAN, GG
    JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY, 1991, 43 (11): : 899 - 920
  • [30] Spread-F Radar Observations in the Midlatitude Ionosphere Using an Ionosonde–Radiodirection Finder
    V.P. Uryadov
    G. G.Vertogradov
    E. G.Vertogradova
    Radiophysics and Quantum Electronics, 2013, 56 : 1 - 11
12345