Patents by Inventor Donald E. Barrick
Donald E. Barrick 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).
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Patent number: 10627509Abstract: Techniques are described for implementation of the requirement of Resolution 612 of International Telecommunications Union that oceanographic radar systems broadcast a Morse-coded call sign for station identification at least once every 20 minutes.Type: GrantFiled: March 14, 2017Date of Patent: April 21, 2020Assignee: CODAR Ocean Sensors, Ltd.Inventors: William C. Rector, Donald E. Barrick
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Patent number: 10042051Abstract: Systems and techniques are described for tsunami detection and warning using coastal radar systems designed primarily for the real-time mapping of ocean surface currents. These radar systems are configured to detect an approaching tsunami in the system's “near field,” i.e., the near-shore region over which the radar system observes the sea surface.Type: GrantFiled: April 27, 2016Date of Patent: August 7, 2018Assignee: CODAR Ocean Sensors, Ltd.Inventors: Donald E. Barrick, Belinda J. Lipa, James Isaacson
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Publication number: 20180074192Abstract: Techniques are described for implementation of the requirement of Resolution 612 of International Telecommunications Union that oceanographic radar systems broadcast a Morse-coded call sign for station identification at least once every 20 minutes.Type: ApplicationFiled: March 14, 2017Publication date: March 15, 2018Inventors: William C. Rector, Donald E. Barrick
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Publication number: 20170315232Abstract: Systems and techniques are described for tsunami detection and warning using coastal radar systems designed primarily for the real-time mapping of ocean surface currents. These radar systems are configured to detect an approaching tsunami in the system's “near field,” i.e., the near-shore region over which the radar system observes the sea surface.Type: ApplicationFiled: April 27, 2016Publication date: November 2, 2017Inventors: Donald E. Barrick, Belinda J. Lipa, James Isaacson
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Patent number: 9442188Abstract: A multi-static radar system for monitoring water surface targets is provided. The multi-static radar system may include a first and second radar, a state machine, and a signal processor. The radars may be located in separate locations and synchronized using timing signals. The state machine may be configured to determine, using the timing signals, start times and end times of radio frequency signal modulations for each radar. A concept of negative pseudo-range is provided, whereby the modulation start times are configured to allow pseudo-negative time delays at as many as half of the radar receivers, thereby doubling the multi-static echo detections. The signal processor may be configured to simultaneously receive and process the echoes of the radar signals received at the radars to determine position and velocity vectors for the monitored water surface targets.Type: GrantFiled: March 14, 2014Date of Patent: September 13, 2016Assignee: CODAR Ocean Sensors, Ltd.Inventors: William C. Rector, Donald E. Barrick, Belinda J. Lipa, Hector Aguilar, Jr.
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Publication number: 20160069992Abstract: A multi-static radar system for monitoring water surface targets is provided. The multi-static radar system may include a first and second radar, a state machine, and a signal processor. The radars may be located in separate locations and synchronized using timing signals. The state machine may be configured to determine, using the timing signals, start times and end times of radio frequency signal modulations for each radar. A concept of negative pseudo-range is provided, whereby the modulation start times are configured to allow pseudo-negative time delays at as many as half of the radar receivers, thereby doubling the multi-static echo detections. The signal processor may be configured to simultaneously receive and process the echoes of the radar signals received at the radars to determine position and velocity vectors for the monitored water surface targets.Type: ApplicationFiled: March 14, 2014Publication date: March 10, 2016Applicant: CODAR Ocean Sensors, LtdInventors: William C. Rector, Donald E. Barrick, Belinda J. Lipa, Hector Aguilar, JR.
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Patent number: 8477065Abstract: An antenna configuration is described for high frequency (HF) or very high frequency (VHF) radars contained in a single vertical post. The radar may include a vertical dipole or monopole transmitting antenna collocated with a three-element receive antenna. The three antennas including two crossed loops and a vertical element are used in a direction-finding (DF) mode. Isolation between the three antennas produces high quality patterns useful for determining target bearings in DF mode. The single vertical post is sufficiently rigid mechanically that it may be installed along a coast without guy wires.Type: GrantFiled: August 31, 2011Date of Patent: July 2, 2013Assignee: CODAR Ocean Sensors LtdInventors: Donald E. Barrick, Peter M. Lilleboe
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Publication number: 20110309973Abstract: An antenna configuration is described for high frequency (HF) or very high frequency (VHF) radars contained in a single vertical post. The radar may include a vertical dipole or monopole transmitting antenna collocated with a three-element receive antenna. The three antennas including two crossed loops and a vertical element are used in a direction-finding (DF) mode. Isolation between the three antennas produces high quality patterns useful for determining target bearings in DF mode. The single vertical post is sufficiently rigid mechanically that it may be installed along a coast without guy wires.Type: ApplicationFiled: August 31, 2011Publication date: December 22, 2011Applicant: CODAR OCEAN SENSORS, LTD.Inventors: Donald E. BARRICK, Peter M. LILLEBOE
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Patent number: 8031109Abstract: An antenna configuration is described for high frequency (HF) or very high frequency (VHF) radars contained in a single vertical post. The radar may include a vertical dipole or monopole transmitting antenna collocated with a three-element receive antenna. The three antennas including two crossed loops and a vertical element are used in a direction-finding (DF) mode. Isolation between the three antennas produces high quality patterns useful for determining target bearings in DF mode. The single vertical post is sufficiently rigid mechanically that it may be installed along a coast without guy wires.Type: GrantFiled: July 17, 2009Date of Patent: October 4, 2011Assignee: Codar Ocean Sensors, Ltd.Inventors: Donald E. Barrick, Peter M. Lilleboe
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Publication number: 20110012776Abstract: An antenna configuration is described for high frequency (HF) or very high frequency (VHF) radars contained in a single vertical post. The radar may include a vertical dipole or monopole transmitting antenna collocated with a three-element receive antenna. The three antennas including two crossed loops and a vertical element are used in a direction-finding (DF) mode. Isolation between the three antennas produces high quality patterns useful for determining target bearings in DF mode. The single vertical post is sufficiently rigid mechanically that it may be installed along a coast without guy wires.Type: ApplicationFiled: July 17, 2009Publication date: January 20, 2011Inventors: Donald E. BARRICK, Peter M. Lilleboe
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Patent number: 7688251Abstract: Systems and methods are described for monitoring the surface flow velocity and volume discharge of rivers and channels using a VHF/UHF radar located in operative relationship with a riverbank. This frequency region allows precise estimation and removal of the Bragg wave velocity; it also is matched to the short wind-wave roughness periods existing on river surfaces so that operation is possible nearly all the time. Methods of bearing determination are also disclosed. Up/downriver surface velocity profiles vs. distance across the river may be constructed from maps of the radial velocity component from a single radar at thousands of points within the radar's coverage. Methods to compensate for Doppler aliasing under high flow conditions are also shown.Type: GrantFiled: February 5, 2008Date of Patent: March 30, 2010Assignee: CODAR Ocean Sensors, LtdInventors: Donald E. Barrick, Calvin C. Teague, Peter M. Lilleboe
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Publication number: 20090195437Abstract: Systems and methods are described for monitoring the surface flow velocity and volume discharge of rivers and channels using a VHF/UHF radar located in operative relationship with a riverbank. This frequency region allows precise estimation and removal of the Bragg wave velocity; it also is matched to the short wind-wave roughness periods existing on river surfaces so that operation is possible nearly all the time. Methods of bearing determination are also disclosed. Up/downriver surface velocity profiles vs. distance across the river may be constructed from maps of the radial velocity component from a single radar at thousands of points within the radar's coverage. Methods to compensate for Doppler aliasing under high flow conditions are also shown.Type: ApplicationFiled: February 5, 2008Publication date: August 6, 2009Inventors: Donald E. Barrick, Calvin C. Teague, Peter M. Lilleboe
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Patent number: 6862922Abstract: Systems and methods for radio wave measurement of surface roughness using electromagnetic boundary conditions. A representative method includes measuring electromagnetic wave fields by monitoring a plurality of signals at several frequencies from different directions; obtaining a plurality of electromagnetic boundary conditions from the plurality of signals; and determining a roughness energy spectrum by utilizing the plurality of electromagnetic boundary conditions.Type: GrantFiled: May 17, 2002Date of Patent: March 8, 2005Assignees: Board of Regents, The University of Texas System, Codar Ocean Sensors, Ltd.Inventors: Rosa M. Fitzgerald, Donald E. Barrick
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Patent number: 6856276Abstract: Systems and methods are described for HF radar frequency sharing with GPS time modulation multiplexing. A method is provided that includes generating clock signals from the time information contained in a GPS signal. Radio frequency signals are transmitted and received in a sequence whose start times are dictated by the clock signals. The clock signals also control the modulation of the radio frequency signals. The radio frequency signals are modulated by using a sweep modulation. An apparatus to implement the method includes a GPS receiver, a state machine, a clock generator, a microprocessor, a memory chip, a signal synthesizer, and a digital data output device. The GPS receiver extracts time information from GPS signals. The state machine controls radar functions versus time. The microprocessor performs modulation multiplexing on radar signals.Type: GrantFiled: March 28, 2002Date of Patent: February 15, 2005Assignee: Codar Ocean Sensors, Ltd.Inventors: Donald E. Barrick, Peter M. Lilleboe, Calvin C. Teague
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Patent number: 6844849Abstract: Systems and methods are described for circular superdirective receive antenna arrays. A method includes calculating an minimum array efficiency of the superdirective circular receive array, calculating a maximum superdirective gain of the superdirective circular receive array, determining an amplitude weight or a phase weight for an array element in the superdirective circular receive array based on the minimum array efficiency and the maximum superdirective gain, and determining number of array elements in the superdirective circular receive array and a radius of the superdirective circular receive array.Type: GrantFiled: July 10, 2003Date of Patent: January 18, 2005Assignee: Codar Ocean Sensors, Ltd.Inventors: Donald E. Barrick, Peter M. Lilleboe
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Patent number: 6774837Abstract: A bistatic radar system (100), method and computer program (178) are provided for mapping of oceanic surface conditions. Generally, the system (100) includes at least one transmitter (102) and at least one receiver (106) located separate from one another, and each having a local oscillator locked to a Global Positioning System (GPS) signal received by a GPS synchronization circuit (134) to provide the necessary coherency between the transmitted and received signals. Preferably, the present invention enables an existing backscatter radar systems to be quickly and inexpensively upgraded to a bistatic radar system (100) through the addition of a transmitter (102) and/or receiver (106) separate from the backscatter radar system, the GPS circuit (134), and use of the computer program (178) and method of the present invention.Type: GrantFiled: October 27, 2003Date of Patent: August 10, 2004Assignee: Codar Ocean Sensors, Ltd.Inventors: Donald E. Barrick, Peter M. Lilleboe, Belinda J. Lipa, James Isaacson
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Publication number: 20040090363Abstract: A bistatic radar system (100), method and computer program (178) are provided for mapping of oceanic surface conditions. Generally, the system (100) includes at least one transmitter (102) and at least one receiver (106) located separate from one another, and each having a local oscillator locked to a Global Positioning System (GPS) signal received by a GPS synchronization circuit (134) to provide the necessary coherency between the transmitted and received signals. Preferably, the present invention enables an existing backscatter radar systems to be quickly and inexpensively upgraded to a bistatic radar system (100) through the addition of a transmitter (102) and/or receiver (106) separate from the backscatter radar system, the GPS circuit (134), and use of the computer program (178) and method of the present invention.Type: ApplicationFiled: October 27, 2003Publication date: May 13, 2004Applicant: CODAR OCEAN SENSORS, LTD.Inventors: Donald E. Barrick, Peter M. Lilleboe, Belinda J. Lipa, James Isaacson
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Publication number: 20030213291Abstract: Systems and methods for radio wave measurement of surface roughness using electromagnetic boundary conditions. A representative method includes measuring electromagnetic wave fields by monitoring a plurality of signals at several frequencies from different directions; obtaining a plurality of electromagnetic boundary conditions from the plurality of signals; and determining a roughness energy spectrum by utilizing the plurality of electromagnetic boundary conditions.Type: ApplicationFiled: May 17, 2002Publication date: November 20, 2003Applicants: Board of Regents, The University of Texas System, and Codar Ocean Sensors, Ltd.Inventors: Rosa M. Fitzgerald, Donald E. Barrick
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Patent number: 6590523Abstract: Systems and methods are described for synthesis of total surface current vector maps by fitting normal modes to radar data. A method includes extracting a scalar data set from a radar signal from a radar. Velocity components are calculated from the radar signal. The velocity components are fitted to a set of scalar eigenfunctions and eigenvalues to simultaneously solve for the best set of normal modes and the corresponding set of constants. The corresponding set of constants represent a corresponding set of amplitudes. The set of constants and the set of normal modes are used to create a two dimensional vector field used in creating a total vector map.Type: GrantFiled: April 1, 2002Date of Patent: July 8, 2003Assignee: Codar Ocean Sensors, Ltd.Inventor: Donald E. Barrick
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Publication number: 20030071751Abstract: A bistatic radar system (100), method and computer program (178) are provided for mapping of oceanic surface conditions. Generally, the system (100) includes at least one transmitter (102) and at least one receiver (106) located separate from one another, and each having a local oscillator locked to a Global Positioning System (GPS) signal received by a GPS synchronization circuit (134) to provide the necessary coherency between the transmitted and received signals. Preferably, the present invention enables an existing backscatter radar systems to be quickly and inexpensively upgraded to a bistatic radar system (100) through the addition of a transmitter (102) and/or receiver (106) separate from the backscatter radar system, the GPS circuit (134), and use of the computer program (178) and method of the present invention.Type: ApplicationFiled: December 19, 2001Publication date: April 17, 2003Inventors: Donald E. Barrick, Peter M. Lilleboe, Belinda J. Lipa, James Isaacson