... basic frequency 主频[率] basic line of sight 基准视线 basic pulse generator 主脉冲发生器，基准脉冲发生器 ...
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Four propagation models of diffraction, line-of-sight, scatting and duct are analyzed. The basic transmission loss for each of the models is calculated according to the ITU-R model and GZB model.
分析了电波的地波绕射传播、视距传播、散射传播和波导传播等四种传播模式，根据ITU - R和GZB建议的模型分别计算了各传播模式的基本传输损耗。
Basic performance, optical system principle, line of sight stabilization and control of parus-98e optronic mast is further described.
对俄罗斯parus—98 E光电桅杆的基本性能、光学系统原理和瞄准线稳定和控制作了深入说明。
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