In this paper the data of geomagnetic pulsations at Zhongshan Station from February 3 to Novernber 30 in 1996 are analyzed in ordcr to study polarization characteristics of Zhongshan Station Pc3 pulsations which comprises the cusp Pc3 pulsation and the nightside Pc3 pulsation. For the cusp Pc3 pulsation. the right-handed polarization is always dominant. But their orientation of major axes of polarizations changes with season, NW-SE is dominant in summer and NE-SW in winter. For the nightside Pc3 pulsation, the right-handed with NE-SW is always dominant before midnight. But the left-handed with the mixing orientation of major axes is dominant in summer and the NE-SW with the mixing polarization sense is dominant in winter after midnight. It means that the two types of Zongshan Station Pc3 pulsations have different sources.
Polarization characteristics of Pc3 pulsations at Zhongshan Station of Antarctica
1 Engebretson Anderson BJ, Cahill LJ Jr, Arnoldy RL. Rosenberg TJ. Carpenter DL, Gail WB, Eather RH (1990); Ionospheric signatures of cusp latitude Pc3 pulsations, J. Geophys. Res., 95 (A3) :2447-2456. DOI:10.1029/JA095iA03p02447
2 Olson JV, Fraser BJ (1994) : Pc3 pulsations in the cusp. In : Engebretson et al. ed. in Solar Wind Sources of Magnetospheric Ultra-Low-Frequency Waves* AGU. Washington D. C., 325-334.
3 Olson JV, Szubrela CALC1997) : A study of Pc3 coherence at cusp latitudes. J. Geophs. Res., 102 (A6); 11375-11383. DOI:10.1029/97JA00750
4 Troiskaya VA (1985) : ULF wave investigations in the dayside cusp. Adv. Space Rev., 5 (4) :219-228. DOI:10.1016/0273-1177(85)90142-5
5 Yang SF, Sun W (1990) :The low frequency hydromagnetic waves in front of the Earths bow shock. Journal of Chinese Geophysics, 33 (2) :239-241.