Accession Number:

AD0698738

Title:

LONGITUDINAL STATION KEEPING OF NEARLY GEOSTATIONARY SATELLITES,

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CALIF

Personal Author(s):

Report Date:

1969-11-01

Pagination or Media Count:

63.0

Abstract:

An examination of the gravitational effects of the sun, moon, and triaxial earth upon the longitudinal motion of near-synchronous equatorial satellites. Accurate station-keeping of a nominally geosynchronous satellite requires the application of control forces to offset these gravitational effects. This study extends earlier work, complementing latitude motion studies with a corresponding examination of longitude and radial motions. Control system activity, which includes average annual pulse and frequency of pulse application, is related to station-keeping accuracy. Radial and longitudinal perturbations are calculated. The results are particularly relevant to the station-keeping problems imposed by a growing number of satellites in synchronous near-equatorial orbits. The present investigation is restricted to satellites limited to small excursions by periodic applications of impulsive control forces. Author

Subject Categories:

  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE