Vermeer Manufacturing Company, Inc.

Underground Imaging Technologies, Inc.

Keith Sjostrom

David Hanson

Scott Alan Rempe

Hans Kelpe

Tod Michael

Tony Briggs

Nathan Copeland

Chad Van Soelen

Ross Jones

Peter John Kelly

Kenneth J Ryerson

A locator device and methods of use are disclosed. The locator device includes a first locating system configured to generate to sense an electromagnetic field emanating from a sonde associated with a drill head, and a second locating system including a global positioning system. The locator device includes a display on the locating system configured to display a map of the area in which the locator device resides based on a location detected by the global positioning system. The locator device also includes control electronics configured to, upon receipt of an input from a user, record location data in a memory associated with the locator device for use by a horizontal directional drilling control system.

Horizontal directional drilling system including sonde position detection using global positioning systems

A user interface includes a display for displaying of a plurality of sensor data sets representative of signals associated with a plurality of sensors configured for sensing of a subsurface. At least some of the sensors are configured for subsurface sensing in a manner differing from other sensors of the plurality of sensors. Each of the sensor data sets comprises sensor data samples each associated with geographic position data. The sensor data sets are shown overlaid within a volume depicted on the display. The graphical representations of the sensor data sets are individually viewable within the volume and displayed in geographical alignment relative to one another within the volume in accordance with the geographic position data of the sensor data samples of each of the sensor data sets.

System and method for visualizing multiple-sensor subsurface imaging data

A mobile geophysical instrument produces geophysical data sets each associated with a position computed by use of a position sensor. A variable time delay results between a time when data for each geophysical data set is collected and a time when a position associated with each geophysical data set is recorded. A module receives distance transducer data and includes circuitry configured to generate a module signal based on trigger signals from the distance transducer and a calibration value. A data acquisition system (DAS) receives geophysical data sets from the geophysical instrument, positioning data from the positioning sensor, and the module signals. The DAS generates a DAS timestamp in response to each module signal and associates the DAS timestamp with each geophysical data set and a position associated with the geophysical data set, so as to substantially eliminate the variable time delay.

Positioning correction system and method for single and multi-channel ground penetrating radar

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Des Moines, IA, United States of America

Keith Sjostrom