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Comparison between magnetic coplanarity and MVA methods in determining the normal of Venusian bow shock
Wang, Shui; Huang, Can; Zhang, TieLong +4 more
With the measurements of magnetic field of Venus Express (VEX), magnetic coplanarity and minimum variance analysis (MVA) methods are analyzed and their validity is tested to determine the normal of Venusian bow shocks. It is found that MVA method is the better than magnetic coplanarity, and 95% shock crossings can be accurately determined by the m…
Downward current electron beams observed at the dipolarization front
Fu, SuiYan; Zong, QuiGang; Pu, ZuYin +1 more
The strong field-aligned pitch angle distribution of electrons is observed right at the dipolarization front (DF) before the arriving of a high speed flow when the four Cluster satellites are traveling in the magnetotail around 15 RE on July 22, 2001. The increased electron fluxes only last for a short time period at the DF, corresponding to just …
Variation of dependence of the cusp location at different altitude on the dipole tilt
Dunlop, Malcolm; Zhang, ZiYing; Shi, JianKui +5 more
Using the Cluster cusp crossings data, dependence of the cusp location at the mid-altitude on the geomagnetic dipole tilt during northward IMF is studied. The results show that the cusp center moves 0.051° Invariant Latitude (ILAT) upon the increase of 1° in the dipole tilt angle at the average altitude of 5.8 RE (Earth radius). According to the p…