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About

Robert W. Denise is a key figure in the development of cutting-edge instrumentation for planetary science, with a primary focus on Mars exploration. His most significant contribution is his work on the Planetary Instrument for X-Ray Lithochemistry (PIXL), a high-precision X-ray fluorescence spectrometer currently operating on the Perseverance rover. As a lead on this instrument, Denise helped deliver a tool that maps the elemental chemistry of Martian rocks at a microscopic scale, directly supporting the mission’s search for ancient biosignatures. The foundational paper detailing PIXL’s design and capabilities has garnered 135 citations, underscoring its importance to the planetary science community. Beyond the instrument itself, Denise has tackled the extreme challenges of Mars surface operations, notably co-authoring a 2024 study on the pre- and in-flight performance of PIXL’s Micro Context Camera, which uses Terrain Relative Navigation to target samples despite the planet’s brutal thermal environment—where daily temperature swings approach 100°C. His work ensures that PIXL can operate with pinpoint accuracy, making him an essential contributor to one of NASA’s most ambitious astrobiology missions.