A.i.r., Inc.

International Series Research, Inc.

Peter F MacDoran

David B Call

Dorothy E Denning

Mark A Coffey

Michael B Mathews

Fred A Ziel

Kenn L Gold

Kenneth L Gold

Steven M Anderson

A method and apparatus for authenticating the identity of a remote user entity where the identity of such user entity is authenticated by use of information specific to geodetic location of the user entity but that changes constantly, making 'spoofing' the host device extremely difficult. The invention is preferably implemented utilizing satellite positioning technology to produce the identifying information.

Method and apparatus for authenticating the location of remote users of

A method and system for tracking the position of at least one moving object, such as, an airborne meteorological instrument from a ground processing station by intercepting wideband spread spectrum signals transmitted from a plurality of satellites in which the code sequence of the signals is not known comprises a receiver circuit in the moving object which compresses the wideband signals received into a narrow band, removes any frequency bias with a reference oscillator having a frequency offset value, forms a narrow analog base-band and transmits to the processing station at which spectral lines are produced and compared with synthetic spectrum values to determine the identity of each satellite, the reference oscillator frequency offset value is estimated, and the location and velocity of the moving object is determined.

Method and apparatus for tracking the position and velocity of airborne

Growing community of inventors

Boulder, CO, United States of America

Peter F MacDoran