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[其他] 求助一到地球物理的题

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发表于 2012-4-2 21:27 | 显示全部楼层 |阅读模式
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知道地球磁场的single dipole moment Mx, Mz,My如何求 相交的位置- l# Y. k$ j0 ]

) b# J. R8 m; C8 T# h* ?( [3 U/ [0 k' s1 I
" m9 V- E8 Q1 t, _" j# N8 _  V
(2) The Earth’s main magnetic field at the surface (radius = 6371 km) can be approximated by a single dipole moment at the Earth's centre with the following (x,y,z) components:" l  i0 h- b0 U3 i  ?6 t
' T- P1 G/ u" T" ]( _! u$ ?+ G
mz = -7.7 x 1022 A m2, mx = -0.479 x 1022 A m2, my = 1.399 x 1022 A m2.; G4 j% ?  K( v+ t8 k3 P5 t3 D7 u

  k) {8 |: Y! {" N. V1 d5 vCalculate the location (latitude, longitude) where the axis of this dipole field intersects the Earth's surface (i.e. where the magnetic field is locally purely vertical and upward).
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