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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' }* F9 B3 ]" ?+ ^* E4 A' n. C

# t- i3 C. ^$ h8 Y3 H+ u3 y
* T; M% O- |* M5 v$ a+ U+ \/ n" F3 N, B: }3 F2 z
(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:; T% k6 v& r2 b* w/ I

. z& q  K: I3 w- Pmz = -7.7 x 1022 A m2, mx = -0.479 x 1022 A m2, my = 1.399 x 1022 A m2.( a! j9 ]' G7 S. ~! j! U
/ j) |) h4 ~: |5 I
Calculate 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).0 m: P9 u( _( d: j( h
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