The TESS-Keck Survey or TKS is an exoplanet search project that uses the Keck I and the Automated Planet Finder to conduct ground-based follow-up of planet candidates discovered by the Transiting Exoplanet Survey Satellite. From Wikipedia
The TESS-Keck Survey provides detailed data on planet mass, radius, and density, offering insights into planetary formation and the uniqueness of our solar system.