| 单词 |
substandard propagation |
| 释义 |
substandard propagation substandard propagation[¦səb′stan·dərd ‚präp·ə′gā·shən] (electromagnetism) The propagation of radio energy under conditions of substandard refraction in the atmosphere; that is, refraction by an atmosphere or section of the atmosphere in which the index of refraction decreases with height at a rate of less than 12 N units (unit of index of refraction) per 1000 feet (304.8 meters). |
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