observed longitude

observed longitude

[əb′zərvd ′län·jə‚tüd]
(navigation)
Longitude determined from observations which result in lines of position extending in a generally north-south direction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

observed longitude

The longitude determined from observations, which results in lines of position extending in a generally north-south direction.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
He reasoned that because these phenomena "invariably begin with the sudden appearance of a small dark spot near the latitude of the middle of the South Equatorial Belt, we might infer that material reaches the visible surface from an eruption of some kind." Moreover, eruptions so localized and energetic might not be from a merely ephemeral source: "If the source of these eruptions is fixed in position on the solid core of the planet, or is at a suitable depth for fluid friction to be a dominating factor, the observed longitudes of the initial outbreak should fit a constant rotation period." To Reese, the investigation promised to provide clues to the rotation period of Jupiter's solid nucleus far beneath its observable canopy of clouds.