Patents by Inventor Robert John Buchler

Robert John Buchler 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).

  • Ins based GPS carrier phase cycle slip detection and repairing
    Patent number: 8170796
    Abstract: An apparatus comprising a position system configured to determine a global positioning (GPS) change vector, and an inertial navigation system (INS) change vector. The position system is configured to determine a relative position between a first platform and a second platform based on the GPS change vector and the INS change vector, and the position system is configured to correct a GPS position calculation error based on the GPS change vector and the INS change vector.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: May 1, 2012
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventors: Gang Kevin Liu, Robert John Buchler
  • INS based GPS carrier phase cycle slip detection and repairing
    Publication number: 20100299066
    Abstract: An apparatus comprising a position system configured to determine a global positioning (GPS) change vector, and an inertial navigation system (INS) change vector. The position system is configured to determine a relative position between a first platform and a second platform based on the GPS change vector and the INS change vector, and the position system is configured to correct a GPS position calculation error based on the GPS change vector and the INS change vector.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 25, 2010
    Inventors: Gang Kevin Liu, Robert John Buchler
  • Estimate of relative position between navigation units
    Patent number: 7702460
    Abstract: A first navigation unit of an apparatus in one example comprises a hybrid global positioning system (GPS)/inertial navigation system (INS) component. The hybrid GPS/INS component provides first GPS information and first INS information for the first navigation unit. The first navigation unit is configured to receive second GPS information and second INS information from a second navigation unit. The second navigation unit comprises a GPS component configured to determine a double-differenced GPS carrier phase measurement through employment of the first GPS information and the second GPS information. The first navigation unit comprises a relative Kalman filter configured to update an INS error estimate for an estimate of a relative position between the first and second navigation units based on the double-differenced GPS carrier phase measurement and the first and second INS information.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: April 20, 2010
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventors: Gang Kevin Liu, Robert John Buchler, Charles P. Bruner
  • Estimate of relative position between navigation units
    Publication number: 20080114544
    Abstract: A first navigation unit of an apparatus in one example comprises a hybrid global positioning system (GPS)/inertial navigation system (INS) component. The hybrid GPS/INS component provides first GPS information and first INS information for the first navigation unit. The first navigation unit is configured to receive second GPS information and second INS information from a second navigation unit. The second navigation unit comprises a GPS component configured to determine a double-differenced GPS carrier phase measurement through employment of the first GPS information and the second GPS information. The first navigation unit comprises a relative Kalman filter configured to update an INS error estimate for an estimate of a relative position between the first and second navigation units based on the double-differenced GPS carrier phase measurement and the first and second INS information.
    Type: Application
    Filed: June 5, 2007
    Publication date: May 15, 2008
    Inventors: Gang Kevin Liu, Robert John Buchler, Charles P. Bruner