When will CLARREO Pathfinder launch?

The instrument is scheduled to launch to the International Space Station no earlier than May 2026.

Where will CLARREO Pathfinder be?

373 miles (600 km) from Earth (aboard the International Space Station)

What will CLARREO Pathfinder do?

The letters in CLARREO stand for Calibration Absolute Radiance and Refractivity Observatory mission. CLARREO Pathfinder is designed to measure the light reflected off the Earth that comes from the Sun and can be used to calibrate other satellites.

Learn more about NASA’s CLARREO Pathfinder.