The surface of Earth is constantly being reshaped by earthquakes, volcanic eruptions, landslides, floods, changes in sea levels and ice sheets and other processes. Since some of these changes amount ...

No audio available for this content. On Aug. 5, the National Geodetic Survey (NGS) stated it will be updating the NOAA CORS to be aligned with the latest International Terrestrial Reference frame, ...

For this year’s Thanksgiving, nearly 49 million Americans are expected to hit the road for the holiday, according to the AAA. And many of those travelers will be using their cars’ onboard GPS ...

VLBI is the only technology that permits determination of positions on Earth with a direct relationship to a celestial reference system. The International Celestial Reference Frame (ICRF) is an ...

Satellite navigation needs coordinate and time references. It is impossible to realize interoperability for multiple GNSS systems without a consistent reference coordinate system and time system.