differential wind
differential wind
[‚dif·ə′ren·chəl ′wind] (ordnance)
In bomb ballistics, the vector difference between the wind at the bomb-release altitude and the wind at some other specific lower altitude; differential winds are required for the computation of the differential ballistic wind.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.