100kHz電磁波エネルギーの流れに及ぼす山岳の影響 : 三角形山岳モデルによる

概要

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Hertz vector values were given to the nodes upon the contour as a restraint one. Then the Hertz potential of each node in the given area was calculated using the Finite Element Method (FEM) on the flat earth far from the transmitting antenna. Those well consisted with K.A. Norton's calculated values. Next, the electro-magnetic field at the vicinity of a triangular mountain model set on the flat earth, was obtained by the FEM as well. A group of curves showing the direction of the maximum electric field vector and another group of curves indicating energy flows of the electro-magnetic wave were pictured from the result. The conclusion is such that the range suffered influence due to the mountain model which height and inclination are 250(m) and 45 degrees respectively, for example, is approximately twice as much as the height.
社団法人日本航海学会の論文
1987-03-25