Patents by Inventor David C. Fisher

David C. Fisher 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).

  • Publication number: 20240402347
    Abstract: An auction-based distributed method for cooperative multi-target tracking by a plurality of satellites, includes distributed target tracking error and utilization computation as an auction bid across the satellite and uses message-passing to find best bid, handles different tracking requirements via definition of bids and modification of task definition used during the bidding process, and selected a list of auction winners to track the target.
    Type: Application
    Filed: August 10, 2022
    Publication date: December 5, 2024
    Inventors: Amit Surana, Yiqing Lin, Tuhin Sahai, Laura A. Gordon, David C. Fisher
  • Publication number: 20240241264
    Abstract: A method including: receiving, at a given satellite, a target list, the target list identifying a plurality of targets; identifying a plurality of satellites of which the given satellite is part; generating, at the given satellite, a plurality of satellite-target pairs, each satellite-target pair including a respective one of the plurality of targets and a respective one of the plurality of satellites; identifying a plurality of costs, each of the plurality of costs corresponding to a different one of the plurality of satellite-target pairs; identifying, by the given satellite, a plurality of assignment pairs, the plurality of assignment pairs being identified based on the plurality of satellite-target pairs and the plurality of costs, each of the plurality of assignment pairs including a respective one of the plurality of targets and a respective one of the plurality of satellites that is assigned to track the respective target.
    Type: Application
    Filed: January 17, 2023
    Publication date: July 18, 2024
    Applicant: Raytheon Company
    Inventors: Yiqing Lin, Amit Surana, Tuhin Sahai, Laura A. Gordon, David C. Fisher
  • Patent number: 9395447
    Abstract: Technology for measuring orientation is described. Signals can be received from a signal source having a known location via at least two antennas of the interferometer that are separated by a predefined distance. A delay between receiving the signals from the signal source at the at least two antennas of the interferometer can be calculated. A line of bearing (LOB) of the interferometer with respect to the signal source can be determined based on the delay between receiving the signals at the at least two antennas from the signal source. The orientation of the interferometer can be measured in a global coordinate system using the LOB of the interferometer with respect to the signal source.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: July 19, 2016
    Assignee: Raytheon Company
    Inventors: Benjamin Dolgin, Sarah E. Law, Joanne M. Attridge, Preethi Pratap, David C. Fisher
  • Publication number: 20160170030
    Abstract: Technology for measuring orientation is described. Signals can be received from a signal source having a known location via at least two antennas of the interferometer that are separated by a predefined distance. A delay between receiving the signals from the signal source at the at least two antennas of the interferometer can be calculated. A line of bearing (LOB) of the interferometer with respect to the signal source can be determined based on the delay between receiving the signals at the at least two antennas from the signal source. The orientation of the interferometer can be measured in a global coordinate system using the LOB of the interferometer with respect to the signal source.
    Type: Application
    Filed: December 11, 2014
    Publication date: June 16, 2016
    Inventors: Benjamin Dolgin, Sarah E. Law, Joanne M. Attridge, Preethi Pratap, David C. Fisher
  • Patent number: 8446310
    Abstract: In a method embodiment, a method includes receiving data generated at one or more monitor systems capable of monitoring for electromagnetic signals. The data is related to characteristics of a signal. The characteristics may include at least two of a respective power of the signal, a respective frequency of the signal, a time of arrival of the signal, and an angle of arrival the signal. A computing system automatically selects at least a subset of the received data. The selection is based at least partially on a physical condition at a location proximate to the monitor systems. The computing system calculates a location of a source of the signal at least in part by processing the subset of the received data. The method further includes determining that the first signal is jamming a second signal. The determination is based at least in part on the calculated location.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: May 21, 2013
    Assignee: Raytheon Company
    Inventors: Sarah E. Law, Charles A. Corwin, David C. Fisher
  • Publication number: 20100045506
    Abstract: In a method embodiment, a method includes receiving data generated at one or more monitor systems capable of monitoring for electromagnetic signals. The data is related to characteristics of a signal. The characteristics may include at least two of a respective power of the signal, a respective frequency of the signal, a time of arrival of the signal, and an angle of arrival the signal. A computing system automatically selects at least a subset of the received data. The selection is based at least partially on a physical condition at a location proximate to the monitor systems. The computing system calculates a location of a source of the signal at least in part by processing the subset of the received data. The method further includes determining that the first signal is jamming a second signal. The determination is based at least in part on the calculated location.
    Type: Application
    Filed: June 12, 2009
    Publication date: February 25, 2010
    Applicant: Raytheon Company
    Inventors: Sarah E. Law, Charles A. Corwin, David C. Fisher
  • Patent number: D368345
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: March 26, 1996
    Inventor: David C. Fisher