Subsynchronous orbit
From MedBib.com - Medicine & Nature
A subsynchronous orbitis an orbit of a satellite that is nearer the planet than it would be if it were in synchronous orbit, i.e. the orbital period is less than the sidereal day of the planet. An Earth satellite that is in (a prograde) subsynchronous orbit will appear to drift eastward as seen from the Earth's surface.
See also
This article is licensed under the GNU Free Documentation License.
All material adapted used from Wikipedia is available under the terms of the GNU Free Documentation License.
Seeking health information online: does Wikipedia matter?