1
Nicholas C Talbot, Michael T Allison, Mark E Nichols: Centimeter accurate global positioning system receiver for on-the-fly real-time kinematic measurement and control. Trimble Navigation, Law Offices Of Thomas E Schatzel, May 21, 1996: US05519620 (88 worldwide citation)

A system embodiment of the present invention comprises a fixed and a roving pair of four-observable GPS receivers and a communication link between them for double differencing code and carrier measurements. Carrier phase integer ambiguities are resolved efficiently by searching the simultaneous narr ...


2
Nicholas C Talbot, Mark E Nichols: Guidance control system for movable machinery. Trimble Navigation, Thomas E Law Offices of Thomas E Schatzel A Prof Corporation Schatzel, January 19, 1999: US05862501 (84 worldwide citation)

A guidance system for movable machinery comprising a GPS processor unit in a "gorilla box" connected to a shock mounted and protected GPS antenna and an operator display with a lightbar that indicates to an operator of the machinery to steer up/down or left/right.


3
Nicholas C Talbot, Mark Nichols: Integrated terrestrial survey and satellite positioning system. Trimble Navigation, John Schipper, November 28, 1995: US05471218 (73 worldwide citation)

Apparatus for measuring surveying parameters, such as distances and angular displacements between survey stations, with improved accuracy. The invention combines a differential satellite positioning system (SATPS), available with positioning systems such as GPS and GLONASS, with electromagnetic meas ...


4
Mark E Nichols, Nicholas C Talbot: Pole-tilt sensor for surveyor range pole. Trimble Navigation, Thomas E Schatzel, April 30, 1996: US05512905 (49 worldwide citation)

A surveyor range pole, for example, equipped with a GPS receiver and antenna mounted at the top end, a battery mounted at the bottom end to better balance the pole, a tilt sensor and a direction sensor. The tilt sensor and direction sensor provide information about the vector that lies between the t ...


5
Nicholas C Talbot: Time-tagging electronic distance measurement instrument measurements to serve as legal evidence of calibration. Trimble Navigation, Thomas E Law Offices of Thomas E Schatzel A Prof Corp Schatzel, December 19, 2000: US06163294 (43 worldwide citation)

A combined satellite positioning and electro-optical total station system including a satellite navigation receiver and a reference oscillator with a reference frequency output that can be related to precision time standards obtained from orbiting navigation-satellite transmissions. Such time standa ...


6
James M Janky, Ulrich Vollath, Nicholas C Talbot: Method and system for location-dependent time-specific correction data. Trimble Navigation, March 13, 2012: US08134497 (29 worldwide citation)

A method and system for delivery of location-dependent time-specific corrections. In one embodiment, a first extended-lifetime correction for a first region is generated. A distribution timetable is used to determine a first time interval for transmitting the first extended-lifetime correction to th ...


7
Nicholas C Talbot, Michael T Allison, Mark E Nichols: Centimeter accurate global positioning system receiver for on-the-fly real-time kinematic measurement and control. Trimble Navigation, Thomas E Law Offices of Thomas E Schatzel A Prof Corp Schatzel, February 11, 1997: US05602741 (29 worldwide citation)

A system embodiment of the present invention comprises a fixed and a roving pair of four-observable GPS receivers and a communication link between them for double differencing code and carrier measurements. Carrier phase integer ambiguities are resolved efficiently by searching the simultaneous narr ...


8
Mark Nichols, Nicholas C Talbot: Integrated SATPS total survey station. Trimble Navigation, April 9, 2002: US06369755 (29 worldwide citation)

Apparatus for measuring surveying parameters, such as distances and angular displacements between an instrument survey station and a mobile survey station, with improved accuracy. The invention combines a differential satellite positioning system (DSATPS), available with positioning systems such as ...


9
James M Janky, Nicholas C Talbot, Ulrich Vollath, Bruce D Riter: System and method for refining a position estimate of a low earth orbiting satellite. Trimble Navigation, September 4, 2012: US08260551 (21 worldwide citation)

In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is obtained with a GNSS receiver on-board the LEO satellite. The first position estimate is communicated to a Virtual Reference Station (VRS) processor. VRS corrections a ...


10
Nicholas C Talbot, Michael T Allison, Mark E Nichols: Method for using external constraints to improve the speed and reliability of phase ambiguity resolution in real-time kinematic initialization. Trimble Navigation, Thomas E Law Offices of Thomas E Schatzel a Prof Corp Schatzel, August 10, 1999: US05935194 (20 worldwide citation)

A method for obtaining integer ambiguity solutions based on externally provided constraints, e.g., altitude. Such constraints are useful in reducing the computational burden created by the search problem, and using constraints is particularly more effective when a more limited number of satellite ve ...