horizon system of coordinates

horizon system of coordinates

[hə′rīz·ən ¦sis·təm əv kō′ȯrd·ən·əts]

(astronomy)

A set of celestial coordinates based on the celestial horizon as the primary great circle.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.