astrogeodetic undulations

astrogeodetic undulations

[‚as·trō‚jē·ə′ded·ik ‚ən·jə′lā·shənz]
(geodesy)
Separations between the geoid and astrogeodetic ellipsoid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.