Patents by Inventor Philip Roger Dahl

Philip Roger Dahl 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).

  • Method and system using a GPS-based phased-array scheme for three-axis attitude determination
    Patent number: 6906664
    Abstract: A method and system for determining three-axis attitude from line-of-sight (LOS) solutions for two or more GPS satellites uses intersections of null cone patterns and LOS vectors to the GPS satellites. In a preferred embodiment, a unified GPS-based sensor also provides navigation information.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: June 14, 2005
    Assignee: The Aerospace Corporation
    Inventors: Gan-Tai Tseng, Philip Roger Dahl, Shih-Chieh Leung, James Chun-Hsiang Liau, Jo-Lien Yang, Michael Shigeru Yonezaki
  • Method and system using a GPS-based phased-array scheme for three-axis attitude determination
    Publication number: 20030048221
    Abstract: A method and system for determining three-axis attitude from line-of-sight (LOS) solutions for two or more GPS satellites uses intersections of null cone patterns and LOS vectors to the GPS satellites. In a preferred embodiment, a unified GPS-based sensor also provides navigation information.
    Type: Application
    Filed: October 8, 2002
    Publication date: March 13, 2003
    Inventors: Gan-Tai Tseng, Philip Roger Dahl, Shih-Chieh Leung, James Chun-Hsiang Liau, Jo-Lien Yang, Michael Shigeru Yonezaki