G
Geodesy

VLBI

Genesis: One Satellite to Bring Four Geodetic Techniques Together

and September 25, 2026
Genesis: One Satellite to Bring Four Geodetic Techniques Together

What if we brought all four major space-geodetic techniques together on a single spacecraft for the first time? ESA’s Genesis mission, expected to launch in 2028, will do just that, combining Global Navigation Satellite System (GNSS), Satellite Laser Ranging (SLR), DORIS and Very Long Baseline Interferometry (VLBI) on one carefully calibrated platform. Well before launch, scientists are inve ...[Read More]

From Quasars to Coordinates: How VLBI Measures Earth’s Shape and Motion

June 26, 2026
From Quasars to Coordinates: How VLBI Measures Earth’s Shape and Motion

Imagine determining the position of a point on Earth with millimeter precision using radio signals from celestial objects billions of light-years away. This may sound like science fiction, but it is exactly what Very Long Baseline Interferometry (VLBI) allows scientists to do. What is VLBI? Long before satellites and digital maps, people looked to the sky and used celestial objects—most commonly t ...[Read More]