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GPS for Global Tidal Measurements

Hydrographers require accurate three-dimensional positions of the survey vessel and typically use differing methods for resolving the horizontal and vertical components. GNSS, such as the Navstar Global Positioning System (GPS),...

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Precise RTK GPS Water Levels

As more people adopt RTK GPS technology for measuring water levels, the issue of ellipsoid-geoid separation is increasingly being discussed. This article outlines various projects undertaken to calibrate this separation,...

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69% Growth for Hemisphere GPS

For the third quarter 2007, Hemisphere GPS reported revenues of $9.5 million, an increase of 69% as compared to $5.6 million in the third quarter of 2006. Sales increased in...

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Hemisphere GPS Announces Centimetre Accuracy

From the 2007 ION GNSS Conference, Hemisphere GPS announced the Eclipse dual-frequency GPS receiver technology. Based on Hemisphere GPS' Crescent L1 GPS technology that incorporates techniques for reducing code measurement...

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GPS III Space Segment Development

A Lockheed Martin-led team has submitted its proposal to design and build the U.S. Air Force's next-generation Global Positioning System Space Segment program, known as GPS Block III. This program...

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Septentrio: From GPS to GNSS

Septentrio has from its inception embraced new possibilities in satellite navigation and offers satellite navigation receivers for professional markets, while preparing users for the possibilities of Global Navigation Satellite Systems...

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SAM GPS-DGPS Navigation Sensors

SAM Electronics of Hamburg has introduced two new high-precision R4 GPS and Differential GPS sensors designed for worldwide navigation aboard vessels of all types and sizes as well as support...

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High-performance Modular GPS Receiver

Trimble introduced the Trimble DSM 232 Receiver, a high-performance GPS receiver capable of sub-meter, decimeter and centimeter accuracy for both harbor and waterway applications and for system integrators. The modular...

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Next Generation of GPS Receivers

NovAtel Inc. has introduced OEMV, its next generation of GPS receivers. The OEMV family of receivers supports modernised GPS frequencies and signals, and incorporates NovAtel's new Vision Correlator, a technology...

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GPS-powered Personal Location Tag

Fastrax Ltd and Alltigo Inc. have integrated a Fastrax iTrax03 GPS receiver into the Alltigo Location Tag LT100, a small, location-aware electronic device that enables the global positioning of a...

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