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CLARREO Pathfinder

CLARREO Pathfinder is designed to measure reflected light from the Earth and the Moon, and can be used to inter-calibrate other Earth observing sensors. CLARREO Pathfinder shows promise to provide a calibration anchor point that would improve government and commercial fleets.

  • NASA Calibration Instrument Records First Measurements in Space

    NASA’s Calibration Absolute Radiance and Refractivity Observatory Pathfinder, or CLARREO Pathfinder mission, reached a significant milestone this summer by achieving first light. First light showcases a mission’s ability to successfully power on and capture data, in this case detailed spectral data, validating years of preparation and pre-launch testing. This moment marks the first time the […]

  • NASA Calibration Instrument Installed on International Space Station

    NASA’s Calibration Absolute Radiance and Refractivity Observatory Pathfinder (CLARREO Pathfinder) instrument was installed onto the International Space Station’s ExPRESS Logistics Carrier-1 platform on May 22. This mounting site on the International Space Station is a standardized external port location that provides a physical instrument interface and critical operating resources for remote science operations.   The CLARREO Pathfinder […]

  • NASA Calibration Instrument Launches to International Space Station

    On Friday, May 15, NASA’s Calibration Absolute Radiance and Refractivity Observatory Pathfinder (CLARREO Pathfinder) instrument launched aboard a SpaceX Dragon spacecraft to the International Space Station as part of SpaceX’s 34th commercial resupply services mission for the agency.  The CLARREO Pathfinder instrument uses an imaging spectrometer to take highly accurate measurements of sunlight reflected by […]