The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2006
Filed:
Sep. 21, 2004
Applicants:
David D. Needelman, Torrance, CA (US);
Rongsheng LI, Hacienda Heights, CA (US);
Yeong-wei A. Wu, Rancho Palos Verdes, CA (US);
Inventors:
David D. Needelman, Torrance, CA (US);
Rongsheng Li, Hacienda Heights, CA (US);
Yeong-Wei A. Wu, Rancho Palos Verdes, CA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C 21/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus for refining a spacecraft state estimate, such as an attitude estimate or an angular velocity estimate, is disclosed. The method computes a plurality equations using residuals describing the difference between observed star positions and predicted positions based on inertial measurements, and solves those equations to generate refined estimates of the spacecraft state estimates.