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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
  g. E3 y" C( T- i% Z! t& l5 |' K, L& |

  l0 y9 m2 R+ [% ?1 T+ j. w/ F, s: \3 [1 k( t% v- K. J
(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:
6 R# t4 z% B; s+ a" [
4 e) _4 p) ?: ~9 }mz = -7.7 x 1022 A m2, mx = -0.479 x 1022 A m2, my = 1.399 x 1022 A m2.  d3 ~6 W  L% E0 u- x' _

4 l2 E7 U4 c: j5 HCalculate 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).
# F4 B, @% L# h: g
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