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The African Geodetic Reference Frame

The African Geodetic Reference Frame (AFREF) was conceived to unify the patchwork of geodetic reference frames and vertical datums in the 54 countries in Africa. A common reference frame is intended to make it easier to co-ordinate planning and development activities within countries and across national boundaries. This article looks at the progress made from the year 2000 up to the end of 2015. (By Richard Wonnacott... (read more)
Latest GNSS news

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GNSS & Galileo

Hemisphere GNSS Eclipse P328 OEM Positioning Board

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Trimble R2 GNSS Receiver for Data Collection with ArcGIS

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KCS TraceME Upgrades TM-178 with LoRa Technology

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Opening up New Opportunities in High-precision GNSS

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GNSS & BeiDou

ChinterGEO 2016: Creating a New Era Founded on 20 Years of Continuity

Marking 20 years of continuity linked to the Chinese and overseas communities of surveying, mapping... (read more)

Multi-sensor Cave Detection in Bulgaria

Caves are important in a wide variety of fields, ranging from construction engineering to mineral ex... (read more)

Core Wall Control Survey in Kuwait

Tall towers can bend and sway due to wind, cranes and other loads. Ideally, such movements should be... (read more)
Joël van Cranenbroeck
What is GNSS?

GNSS (Source: NASA)GNSS stands for global navigation satellite system and refers to a constellation of satellites, which provide signals from out of space for positioning. A GNSS has global coverage. There are several GNSS systems: GPS (United States of America), Glonass (Russian Federation), Galileo (Europe) and Beidou (China).

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