Accession Number : AD0637455

Title :   THE EFFECTS OF THE NODAL REGRESSION OF THE ORBIT ON THE GRAVITY PRECESSION OF A GYROSCOPIC SATELLITE.

Corporate Author : ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB

Personal Author(s) : Myers,James L. , Jr

Report Date : JUL 1966

Pagination or Media Count : 25

Abstract : A gyroscopic satellite has been proposed for a test of the general theory of relativity in which the gyro drift rate to be measured is less than seven seconds of arc per year. A simple passive gyroscope has been proposed which uses sunlight reflected from mirrors to provide optical data to determine the spin axis orientation. The gravity gradient torque acting on the satellite is one of several extraneous disturbances which can cause spurious precession of the gyro spin axis. General equations for the precession of a gyro satellite in a regressing orbit are derived. These equations may be used to specify the tolerances for initial spin axis and orbit alignments which enable an accurate measurement of the relativity effect. (Author)

Descriptors :   (*RELATIVITY THEORY, TEST METHODS), (*SCIENTIFIC SATELLITES, *GYROSCOPES), (*ORBITS, *PRECESSION), GRAVITY, SPINNING(MOTION), TORQUE, MOMENTS, EQUATORIAL ORBITS, POLAR ORBIT TRAJECTORIES, EQUATIONS

Subject Categories : Celestial Mechanics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE