摘要: An examination of the equatorial boundary auroral oval (as defined by quiet-time electron precipitations) reveals a periodic variation its latitudinal location. The period oscillation is 24-hours and amplitude about 4°. This diurnal seen in evening morning sectors phase as northern southern hemispheres. observed attributed to UT size association with daily precession geomagnetic pole. smaller when pole near local midnight around 0600 UT; it larger noon 1800 UT. edges sector quiet (1900–2100 MLT) are located at 72° 69° CGL, respectively, which correspond minimum oval.
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agu.org参考文章(12)
Ching-I. Meng, Polar Cap Variations and the Interplanetary Magnetic Field Dynamics of the Magnetosphere. ,vol. 78, pp. 23- 46 ,(1979) , 10.1007/978-94-009-9519-2_2
F. T. Berkey, Y. Kamide, On the distribution of global auroras during intervals of magnetospheric quiet Journal of Geophysical Research. ,vol. 81, pp. 4701- 4714 ,(1976) , 10.1029/JA081I025P04701
A. T. Y. Lui, D. Venkatesan, C. D. Anger, S. -I. Akasofu, W. J. Heikkila, J. D. Winningham, J. R. Burrows, Simultaneous observations of particle precipitations and auroral emissions by the Isis 2 satellite in the 19–24 MLT sector Journal of Geophysical Research. ,vol. 82, pp. 2210- 2226 ,(1977) , 10.1029/JA082I016P02210
R. H. Holzworth, C.-I. Meng, Mathematical representation of the auroral oval Geophysical Research Letters. ,vol. 2, pp. 377- 380 ,(1975) , 10.1029/GL002I009P00377
Y.I. Feldstein, G.V. Starkov, Dynamics of auroral belt and polar geomagnetic disturbances Planetary and Space Science. ,vol. 15, pp. 209- 229 ,(1967) , 10.1016/0032-0633(67)90190-0
C. -I. Meng, Simultaneous observations of low-energy electron precipitation and optical auroral arcs in the evening sector by the DMSP 32 satellite Journal of Geophysical Research. ,vol. 81, pp. 2771- 2785 ,(1976) , 10.1029/JA081I016P02771
S.-I. Akasofu, The roles of the north-south component of the interplanetary magnetic field on large-scale auroral dynamics observed by the DMSP satellite Planetary and Space Science. ,vol. 23, pp. 1349- 1354 ,(1975) , 10.1016/0032-0633(75)90030-6
R. E. Sheehan, R. L. Carovillano, Characteristics of the equatorward auroral boundary near midnight determined from DMSP images Journal of Geophysical Research. ,vol. 83, pp. 4749- 4754 ,(1978) , 10.1029/JA083IA10P04749
C.-I. Meng, B. Mauk, C.E. McIlwain, Electron precipitation of evening diffuse aurora and its conjugate electron fluxes near the magnetospheric equator Journal of Geophysical Research. ,vol. 84, pp. 2545- 2558 ,(1979) , 10.1029/JA084IA06P02545
C.P. Pike, B.S. Dandekar, Evening sector auroral oval dynamics from DMSP photographs Journal of Geophysical Research. ,vol. 84, pp. 3389- 3402 ,(1979) , 10.1029/JA084IA07P03389