Patents by Inventor Lawrence C. Sparks

Lawrence C. Sparks 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).

  • Ionospheric slant total electron content analysis using global positioning system based estimation
    Patent number: 9576082
    Abstract: A method, system, apparatus, and computer program product provide the ability to analyze ionospheric slant total electron content (TEC) using global navigation satellite systems (GNSS)-based estimation. Slant TEC is estimated for a given set of raypath geometries by fitting historical GNSS data to a specified delay model. The accuracy of the specified delay model is estimated by computing delay estimate residuals and plotting a behavior of the delay estimate residuals. An ionospheric threat model is computed based on the specified delay model. Ionospheric grid delays (IGDs) and grid ionospheric vertical errors (GIVEs) are computed based on the ionospheric threat model.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: February 21, 2017
    Assignee: California Institute of Technology
    Inventors: Lawrence C. Sparks, Anthony J. Mannucci, Attila Komjathy
  • IONOSPHERIC SLANT TOTAL ELECTRON CONTENT ANALYSIS USING GLOBAL POSITIONING SYSTEM BASED ESTIMATION
    Publication number: 20140163938
    Abstract: A method, system, apparatus, and computer program product provide the ability to analyze ionospheric slant total electron content (TEC) using global navigation satellite systems (GNSS)-based estimation. Slant TEC is estimated for a given set of raypath geometries by fitting historical GNSS data to a specified delay model. The accuracy of the specified delay model is estimated by computing delay estimate residuals and plotting a behavior of the delay estimate residuals. An ionospheric threat model is computed based on the specified delay model. Ionospheric grid delays (IGDs) and grid ionospheric vertical errors (GIVEs) are computed based on the ionospheric threat model.
    Type: Application
    Filed: July 10, 2013
    Publication date: June 12, 2014
    Inventors: Lawrence C. Sparks, Anthony J. Mannucci, Attila Komjathy