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About

J. R. Johnson is a leading planetary scientist whose work has fundamentally advanced our understanding of Mars and the Moon through remote sensing and robotic exploration. Their primary research areas include the geochemistry and mineralogy of planetary surfaces, with a major focus on the development and application of spectroscopic instruments for in-situ analysis. Johnson’s most significant contribution is their integral role in the SuperCam instrument suite on NASA’s Perseverance rover, a groundbreaking tool that combines laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy to remotely characterize Martian rocks and soils. Their highly cited 2020 paper detailing the SuperCam body unit and system tests (322 citations) is a cornerstone of the mission’s success. Earlier, Johnson led the 1999 Marsokhod rover field simulation at Silver Lake, California, which provided critical operational insights for future Mars missions. They have also contributed to lunar science, notably in determining ilmenite abundances from remote data—a key resource for future lunar bases. With a career spanning from the Apollo era to Mars 2020, Johnson’s work continues to shape how we explore and interpret other worlds.