1
Peter F MacDoran, Michael B Mathews, Fred A Ziel, Kenn L Gold, Steven M Anderson, Mark A Coffey, Dorothy E Denning: Method and apparatus for authenticating the location of remote users of networked computing systems. International Series Research, Dorsey & Whitney, May 26, 1998: US05757916 (384 worldwide citation)

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 invent ...


2
Peter F MacDoran: Method and apparatus for calibrating the ionosphere and application to surveillance of geophysical events. The United States of America represented by the Administrator of the National Aeronautics and Space Administration, Paul F McCaul, Thomas H Jones, John R Manning, July 31, 1984: US04463357 (144 worldwide citation)

The columnar electron content of the ionosphere between a spacecraft (10) and a receiver (12, 14) is measured in realtime by cross correlating two coherently modulated signals transmitted at different frequencies (L.sub.1, L.sub.2) from the spacecraft to the receiver using a cross correlator (16). T ...


3
Peter F MacDoran, Donovan J Spitzmesser: Method and apparatus for deriving pseudo range from earth-orbiting satellites. Istac Incorporated, Christie Parker & Hale, January 10, 1989: US04797677 (103 worldwide citation)

The invention permits a user to derive his pseudo range from earth-orbiting, signal-transmitting satellites without knowledge of the code sequence of modulation carried by the signal, if any. A modulated radio frequency signal having a component at a given frequency, which is transmitted from a sate ...


4
Michael B Mathews, Kenn L Gold, Peter F MacDoran: System and method for positioning in configured environments. Loctronix Corporation, Black Lowe & Graham PLLC, March 31, 2009: US07511662 (94 worldwide citation)

The present invention relates to a system and method for providing location determination in a configured environment in which Global Navigation Satellite System Signals may not be available. In this regard, local beacon systems generate spread spectrum CDMA signals that are received by spectral com ...


5
Robert A Administrator of the National Aeronautics and Space Administration with respect to an invention of Frosch, Peter F MacDoran: System for near real-time crustal deformation monitoring. Monte F Mott, John R Manning, Paul F McCaul, October 9, 1979: US04170776 (66 worldwide citation)

A system for use in detecting earth crustal deformation using an RF interferometer technique for such purposes as earthquake predictive research and eventual operational predictions. A lunar based RF transmission or transmissions from earth orbiting satellites are received at two locations on Earth, ...


6
Robert A Administrator of the National Aeronautics and Space Administration with respect to an invention of Frosch, Peter F MacDoran: Interferometric locating system. Monte F Mott, John R Manning, Paul F McCaul, July 29, 1980: US04215345 (38 worldwide citation)

A system for determining the position of a vehicle or other target that emits radio waves, which is of the type that senses the difference in time of arrival at spaced ground stations of signals from the vehicle to locate the vehicle on a set of intersecting hyperbolas. A network of four ground stat ...


7
Peter F MacDoran, David B Call, Kenneth L Gold: Method and apparatus for tracking the position and velocity of airborne instrumentation. A I R, John E Reilly, September 13, 1994: US05347285 (27 worldwide citation)

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 kn ...


8
Michael B Mathews, Kenn L Gold, Peter F MacDoran: System and method for positioning in configured environments. Loctronix Corporation, Black Lowe & Graham PLLC, March 29, 2011: US07916074 (5 worldwide citation)

The present invention relates to a system and method for providing location determination in a configured environment in which Global Navigation Satellite System Signals may not be available. In this regard, local beacon systems generate spread spectrum CDMA signals that are received by spectral com ...


9
Michael B Mathews, Peter F MacDoran: Doppler aided inertial navigation. Telecommunication Systems, Tarolli Sundheim Covell & Tummino, January 19, 2016: US09239376 (1 worldwide citation)

Doppler Aided Inertial Navigation (DAIN) facilitates the determination of position, velocity and direction of mobile devices operating in highly obstructed GPS/GNSS environments. Delivering high precision, high resolution positioning information using signals of opportunity, the present invention me ...


10
Michael B Mathews, Peter F MacDoran: System and method for positioning using hybrid spectral compression and cross correlation signal processing. TELECOMMUNICATION SYSTEMS, Tarolli Sundheim Covell & Tummino, August 4, 2015: US09097783 (1 worldwide citation)

The present invention relates to a system and method for positioning and navigation using hybrid spectral compression and cross correlation signal processing of signals of opportunity, which may include Global Navigation Satellite System (GNSS) as well as other wideband energy emissions in GNSS obst ...