| 单词 |
double-theodolite observation |
| 释义 |
double-theodolite observation double-theodolite observation[¦dəb·əl thē′äd·əl‚īt äb·zər′vā·shən] (engineering) A technique for making winds-aloft observations in which two theodolites located at either end of a base line follow the ascent of a pilot balloon; synchronous measurements of the elevation and azimuth angles of the balloon, taken at periodic intervals, permit computation of the wind vector as a function of height. |
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