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Family members of Dr. Michael Freilich, for whom the Sentinel-6 Michael Freilich satellite is named, gather at Vandenberg Air Force Base in California on Nov. 20, 2020, the day before the spacecraft's planned launch atop a Falcon 9 rocket. Freilich served as director of NASA's Earth Science Division in the Science Mission Directorate at the agency's Headquarters from 2006 until his retirement in 2019. A tireless advocate for advancing satellite measurements of the ocean, he was instrumental in advancing ocean altimetry and helped drive the evolution of NASA Earth science from a program that launched an Earth-observing space mission every few years to one that launches several missions each year. Freilich died Aug. 5, 2020, of pancreatic cancer. Sentinel-6 Michael Freilich launched Nov. 21, 2020, at 9:17 a.m. PST (12:17 p.m. EST). NASA's Launch Services Program at Kennedy Space Center was responsible for launch management