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NASA's Perseverance Mars rover used the WATSON camera on the end of its robotic arm to conduct a focus test on May 9, 2021, the 78th Martian day, or sol, of the mission. WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) is located on the SHERLOC (Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals) instrument, located at the end of Perseverance's long robotic arm. NASA's Jet Propulsion Laboratory built and manages operations of Perseverance and Ingenuity for the agency. Caltech in Pasadena, California, manages JPL for NASA. WATSON was bui…
