Accession Number:

AD0655645

Title:

STABILIZATION SYSTEM ANALYSIS AND PERFORMANCE OF THE GEOS-A GRAVITY-GRADIENT SATELLITE (EXPLORER XXIX).

Descriptive Note:

Technical memorandum,

Corporate Author:

JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s):

Report Date:

1967-03-01

Pagination or Media Count:

20.0

Abstract:

The paper discusses the stabilization system analysis and orbital performance of the GEOS-A gravity-gradient satellite which was launched into orbit on 6 November 1965. The analysis is performed with the aid of a rather general digital simulation of the non-linear differential equations of motion. It includes the effects of gravity-gradient forces, orbital eccentricity, eddy current dampers, residual magnetic dipoles, solar radiation pressure, and thermal distortion of the spacecrafts stabilization boom. The attitude measuring system aboard the spacecraft is described, and processing of the attitude data is discussed. Description of failures in the attitude determination system and discussion of the subsequent effects on the experimental attitude results are included. Experimental attitude results are compared with the results of the digital simulation. General agreement is obtained. Author

Subject Categories:

  • Unmanned Spacecraft
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE