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Geodetic Observation:
Measure Heights with Clocks

Measure heights by clocks with an accuracy of 4 cm over a height difference of 450 m is now possible. Discover this new geodetic technique ...

IAG Statement on Ukraine

IAG issued an official statement expressing its deep dismay and concern about the military offensives in Ukraine. GGOS is changing its logo color for the next few weeks as a sign of solidarity.
© Per Helge Andersen

New eBook:
One-mm Accuracy Unified Geocentric
Terrestrial Reference System

A new eBook with the title "How to establish and maintain a one-mm accuracy unified Geocentric Terrestrial Reference System - A theoretical model" was now published.