1
Peter V W Loomis, Peter L Froeberg: Position reporting cellular telephone. Trimble Navigation, Thomas E Law Offices of Thomas E Schatzel A Prof Corporation Schatzel, April 29, 1997: US05625668 (347 worldwide citation)

A cellular telephone system embodiment of the present invention comprises a combination global positioning system (GPS) receiver and cellular transceiver and a data processing facility for converting latitude, longitude, velocity and bearing information provided by the GPS receiver into meaningful d ...


2
K Tysen Mueller, Peter V W Loomis, Rudolph M Kalafus, Leonid Sheynblat: Networked differential GPS system. Trimble Navigation, Thomas E Schatzel, June 21, 1994: US05323322 (326 worldwide citation)

An embodiment of the present invention relates to a worldwide network of differential GPS reference stations (NDGPS) that continually track the entire GPS satellite constellation and provide interpolations of reference station corrections tailored for particular user locations between the reference ...


3
Peter V W Loomis: Network for carrier phase differential GPS corrections. Trimble Navigation, John Schipper, December 19, 1995: US05477458 (117 worldwide citation)

Method and apparatus for providing GPS pseudorange correction information over a selected geographic region S with a diameter of up to 3000 km with an associated inaccuracy no greater than 5 cm. N spaced apart GPS fiducial stations (N.gtoreq.3), whose location coordinates (u.sub.n, v.sub.n, v.sub.n) ...


4
Peter V W Loomis, Ralph Eschenbach, Paul Braisted, Chung Lau: Reduction of time to first fix in an SATPS receiver. Trimble Navigation, John Schipper, June 29, 1999: US05917444 (105 worldwide citation)

A method for fast acquisition, in as little as 6-15 seconds, of signals from a satellite in a Satellite Positioning System (SATPS), such as GPS or GLONASS, that does not require permanent storage of satellite ephemeris information at an SATPS ground station. This SATPS signal acquisition method can ...


5
John F Schipper, Peter V W Loomis, Allan M Pelley, James M Janky, Len Sheynblat: Authentication of a message source. Trimble Navigation, John F Schipper, May 19, 1998: US05754657 (95 worldwide citation)

Methods for authentication or validation of the location of a putative source (ps) of a message, using time varying location determination (LD) signals that are received from J sources (J>1) of LD signals G(t;j;ps) that are spaced apart from the putative source. The putative source forms an augmente ...


6
Peter V W Loomis: Post-processing of inverse differential corrections for SATPS mobile stations. Trimble Navigation, John Schipper, October 21, 1997: US05680140 (81 worldwide citation)

A method for enhancing the accuracy of location coordinates and/or clock bias computed for a mobile user station that is part of a Satellite Positioning System (SATPS), such as GPS or GLONASS. A data processing station is provided with pseudorange corrections PRC(t;j;ref) for an SATPS reference stat ...


7
James M Janky, Peter V W Loomis, John F Schipper: Integrated image transfer for remote target location. Trimble Navigation, John Schipper, October 22, 1996: US05568152 (81 worldwide citation)

Apparatus and method for accurately determining the location of an target or other designated object by an observer that is spaced apart from the object. The observer views the target through a viewer and rangefinder and determines the distance of the target from the observer. The observer determine ...


8
Peter V W Loomis: Inverse differential corrections for SATPS mobile stations. Trimble Navigation, John Schipper, February 27, 1996: US05495257 (62 worldwide citation)

A method for enhancing the accuracy of location coordinates and/or clock bias computed for a mobile user station that is part of a Satellite Positioning System (SATPS), such as GPS or GLONASS. A reference SATPS station is provided with known location coordinates, and pseudoranges PR(t) and pseudoran ...


9
Peter V W Loomis, David R Gildea, James M Janky, John F Schipper: Authentication of accumulated instrument data. Trimble Navigation, John Schipper, July 18, 2000: US06092193 (49 worldwide citation)

Methods and apparati for representing and storing a sequence of digital data values so that, once stored in memory, a data value cannot be modified, or cannot be modified without detection. Detection of subsequent data alteration may use error checksums, storage of instrument data in different data ...


10
Peter V W Loomis: Post-processing of inverse DGPS corrections. Trimble Navigation, John F Schipper, January 11, 2000: US06014101 (48 worldwide citation)

A method for enhancing the accuracy of location coordinates and/or clock bias computed for a mobile user station that is part of a Satellite Positioning System (SATPS), such as GPS or GLONASS. A data processing station is provided with pseudorange corrections PRC(t;j;ref) for an SATPS reference stat ...