observing angle

observing angle

[əb′zər·viŋ ‚aŋ·gəl]
(ordnance)
Angle at the target between a line to the observer and a line to the gun or battery; the angular distance of an observer from the gun or battery.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
When students compare and contrast an assortment of photographs related to a particular subject for example, horses, flowers, figures in action, and so forth--they can perceive the different varieties of a subject--the shapes, colors, lines and textures--while observing angles and proportions.