英语词汇“virtual height”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

virtual height n. Radio the height of a notional reflecting plane surface which in free space would give rise to the same travel time for reflected radio waves as an actual ionospheric layer.

ΚΠ

1928 Proc. IRE 16 85 The heights as given in this paper are virtual heights. They are calculated on the assumption that ordinary reflection takes place and that the layer is parallel to the earth's surface.

1975 D. G. Fink Electronics Engineers' Handbk. xviii. 107 A height equal to the virtual height h′ of reflection of the equivalent vertical frequency.

2008 J. A. Richards Radio Wave Propagation iii. 34 The height will be overestimated when assuming..that the signal travels at the speed of light; that is why it is referred to as the virtual height.

单词	virtual height
释义	> as lemmas virtual height virtual height n. Radio the height of a notional reflecting plane surface which in free space would give rise to the same travel time for reflected radio waves as an actual ionospheric layer. ΚΠ 1928 Proc. IRE 16 85 The heights as given in this paper are virtual heights. They are calculated on the assumption that ordinary reflection takes place and that the layer is parallel to the earth's surface. 1975 D. G. Fink Electronics Engineers' Handbk. xviii. 107 A height equal to the virtual height h′ of reflection of the equivalent vertical frequency. 2008 J. A. Richards Radio Wave Propagation iii. 34 The height will be overestimated when assuming..that the signal travels at the speed of light; that is why it is referred to as the virtual height. extracted from virtualadj.n. < as lemmas
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