Patents by Inventor Jya-Syin W. Chien

Jya-Syin W. Chien has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Satellite navigation using long-term navigation information and autonomous orbit control
    Patent number: 8099186
    Abstract: An improved approach to satellite-based navigation (e.g., GPS) is provided. In one embodiment, a method includes determining a nominal orbital path of a navigation satellite. The method also includes transmitting ephemeris data corresponding to the nominal orbital path from the navigation satellite to a plurality of navigation devices. The method further includes determining an actual orbital path of the navigation satellite locally at the navigation satellite. In addition, the method includes determining a deviation between the actual orbital path and the nominal orbital path locally at the navigation satellite. The method also includes autonomously adjusting the actual orbital path locally at the navigation satellite to reduce the deviation between the actual orbital path and the nominal orbital path.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: January 17, 2012
    Assignee: The Boeing Company
    Inventors: Jonathan A. Tekawy, Raymond S. DiEsposti, Clifford W. Kelley, Jya-Syin W. Chien
  • SATELLITE NAVIGATION USING LONG-TERM NAVIGATION INFORMATION AND AUTONOMOUS ORBIT CONTROL
    Publication number: 20080177430
    Abstract: An improved approach to satellite-based navigation (e.g., GPS) is provided. In one embodiment, a method includes determining a nominal orbital path of a navigation satellite. The method also includes transmitting ephemeris data corresponding to the nominal orbital path from the navigation satellite to a plurality of navigation devices. The method further includes determining an actual orbital path of the navigation satellite locally at the navigation satellite. In addition, the method includes determining a deviation between the actual orbital path and the nominal orbital path locally at the navigation satellite. The method also includes autonomously adjusting the actual orbital path locally at the navigation satellite to reduce the deviation between the actual orbital path and the nominal orbital path.
    Type: Application
    Filed: May 1, 2007
    Publication date: July 24, 2008
    Inventors: Jonathan A. Tekawy, Raymond S. DiEsposti, Clifford W. Kelley, Jya-Syin W. Chien