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Scopas SE-81甚低频系统使用甚低频发射台发射的15—25KHZ范围的一次场。由于无穷远天线发射的无干扰场基本上是水平的成份,而且强度相当稳定,当存在良导体时,引起场的几何形态和振幅的局部畸变,而且可产生极化场。 Scopas接收机除了能够测定各种振幅和几何参数外,还可以测定极化椭球体的特征,应
The Scopas SE-81 Very Low Frequency System uses a field from 15-25 kHz on a very low frequency transmitter. Since the interference-free field emitted by an infinity antenna is basically a horizontal component and is quite stable in intensity, there is a local distortion of the field geometry and amplitude when a good conductor is present, and a polarized field can be generated. In addition to the ability to measure a wide range of amplitudes and geometrical parameters, the Scopas receiver also measures the characteristics of polarized ellipsoids and should