Nearly 900 days of laser measurements in Earth orbit https://www.mpg.de/17016863/nearly-900-days-of-laser-measurements-in-earth-orbit
On this day three years ago the Laser Ranging Interferometer on both satellites of the German-US geodesy mission GRACE Follow-On was activated for the first time. Since then, the system has been running reliably and has been delivering high-precision distance measurements in scientific data taking mode. Now, researchers at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) and Leibniz University Hannover look back the successful first three years and towards the future.
satellites traveled 60 million kilometers, while during the same time the laser link