Abstract: Methods and apparatus are described for marine asset security and tracking (MAST). A method includes transmitting identification data, location data and environmental state sensor data from a radio frequency tag. An apparatus includes a radio frequency tag that transmits identification data, location data and environmental state sensor data. Another method includes transmitting identification data and location data from a radio frequency tag using hybrid spread-spectrum modulation. Another apparatus includes a radio frequency tag that transmits both identification data and location data using hybrid spread-spectrum modulation.
Type:
Grant
Filed:
May 6, 2004
Date of Patent:
July 1, 2008
Assignees:
UT-BAttelle, LLC, Navigational Sciences, Inc.
Inventors:
Gregory Richard Hanson, Stephen Fulton Smith, Michael Roy Moore, Eric Lesley Dobson, Jeffrey Scott Blair, Christopher Allen Duncan, Roberto Lenarduzzi