Comparison between magnetic coplanarity and MVA methods in determining the normal of Venusian bow shock

被引：4

作者：

Shan LiCan ^{[1
]}

Lu QuanMing ^{[1
]}

Zhang TieLong ^{[1
]}

Gao XinLiang ^{[1
]}

Huang Can ^{[1
]}

Su YanQing ^{[1
]}

Wang Shui ^{[1
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Dept Geophys & Planetary Sci, Hefei 230026, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2013年 / 58卷 / 20期

基金：

中国国家自然科学基金;

关键词：

MVA; magnetic coplanarity; Venusian bow shock; shock normal; PERPENDICULAR SHOCK; SOLAR-WIND; FIELD; DISCONTINUITIES; MINIMUM; EXPRESS; RAMP;

D O I：

10.1007/s11434-013-5675-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 method. However, the occurrence of the shock normal which is not determined accurately by magnetic coplanarity increases with the decrease of the solar zenith angle (SZA). At the same time, compared with quasi-parallel shocks, there is more occurrence of the shock normal which cannot be determined accurately by magnetic coplanarity for quasi-perpendicular shocks.

引用

页码：2469 / 2472

页数：4

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