LARES-2 tightens Earth's frame-dragging test to ~0.1% accuracy
The LARES-2 laser-ranging satellite, combined with LAGEOS and GRACE data, delivers the most precise measurement of Earth's frame-dragging to about one part in a thousand, providing a stringent confirmation of general relativity in the near-Earth environment and placing tight limits on alternative gravity models such as Chern–Simons gravity, while also improving the understanding of Earth tides through high-precision satellite analysis with GEODYN/UTOPIA and ILRS data.