Patent Number: 6,295,021

Title: Techniques for monitoring and controlling yaw attitude of a GPS satellite

Abstract: Techniques for monitoring and controlling yawing of a GPS satellite in an orbit that has an eclipsing portion out of the sunlight based on the orbital conditions of the GPS satellite. In one embodiment, a constant yaw bias is generated in the attitude control system of the GPS satellite to control the yawing of the GPS satellite when it is in the shadow of the earth.

Inventors: Lichten; Stephen M. (Pasadena, CA), Bar-Sever; Yoaz (Altadena, CA), Zumberge; James (San Marino, CA), Bertiger; William I. (Altadena, CA), Muellerschoen; Ronald J. (Pasadena, CA), Wu; Sien-Chong (Torrance, CA), Hurst; Kenneth (Lebec, CA), Blewitt; Geoff (Durham, GB), Yunck; Thomas (Pasadena, CA), Thornton; Catherine (Arcadia, CA), Heflin; Michael (La Cresenta, CA)

Assignee: California Institute of Technology

International Classification: G01S 1/00 (20060101); H04B 007/185 (); B64G 001/36 ()

Expiration Date: 09/25/2018