Steep-Slope Monitoring GPS Multiple-Antenna System at Xiaowan Dam Nov 1, 2005 By: Xiufeng He, Wengang Sang, Yongqi Chen, Xiaoli Ding

Although GPS is an efficient tool for deformation monitoring, it also is an expensive one for large projects. The authors developed a remote-controlled monitoring system using an electronic switching device for multiple antennas to monitor steep slopes at the Xiaowan hydropower station in China.

LiDAR on the Level in Afghanistan GPS, Inertial Map the Kabul Road Jul 1, 2005 By: Simon Newby, Paul Mrstik

Concerns about airspace security in Afghanistan literally brought a LiDAR-based survey operation down to the ground.

Pacify the Power GPS Harness for Large-Area Electrical Grid Apr 1, 2005 By: Dennis C. Erickson, Carson Taylor

A control system uses GPS to timetag with microsecond accuracy voltage and current measurements throughout a large-area power grid.

Millimeters in Motion Dynamic Response Precisely Measured Jan 1, 2005 By: Ana Paula C. Larocca, Ricardo Ernesto Schaal

Brazilian researchers devised a way to detect dynamic millimetric displacements in large structures using single-frequency GPS receivers. They combine interferometry, satellite geometry, and a novel analysis of L1 double-difference phase residuals of regular static observations over a short baseline.

GPS & Structural Monitoring Deformation Studies of Koyna Dam Nov 1, 2004 By: Madhav N. Kulkarni, Deepa Rai, Nisha Radhakrishnan

Researchers have monitored Koyna Dam for four years, conducting structural and crustal deformation studies using GPS.

Just Keep Rolling a Lawn ION's Autonomous Mowers Sep 1, 2004 By: Frank van Graas, Boris Pervan, Laura O'Rear, Jade Morton, Mikel Miller, John Raquet

You might not know it from your own backyard performance, but mowing a lawn accurately and precisely constitutes a difficult systems problem, requiring centimeter-level accuracy and precision control for straight lines and smooth turns.

To All the Ships at Sea Jul 1, 2004 By: Jean Marechal

EGNOS serves as part of a system to track ocean-going vessels automatically over a large region.

Precise Rail Track Surveying This article describes the Swiss Trolley, a multisensor measurement system incorporating real-time kinematic (RTK) GPS, and its use to survey sections of railroad track in the United Kingdom. May 1, 2004 By: Ralph Glaus, Alain Geiger, Urs Müller, Gerard Peels

Describes a multisensor measurement system incorporating real-time kinematic (RTK) GPS, and its use to survey sections of railroad track in the United Kingdom.

Picture This World Landscape Art of the AlpenRhein Apr 1, 2004 By: Kuno Bont, Bernarda Mattle

Artists from Switzerland, Liechtenstein, Austria, and Finland used GPS to create and document giant works on a terrestrial canvas.