The Climate Absolute Radiance and Refractivity Observatory (CLARREO) Pathfinder Reflected Solar mission is a NASA-directed mission executed under the direction of the Science Mission Directorate – Earth Science Division with two primary mission goals: measure Earth-reflected sunlight with accuracy of 0.3% (k=1) and serve as an on-orbit inter-calibration reference to other orbiting sensors.
To address the technical challenges outlined by the mission requirements, the mission selected the Ada programming language and GNAT Pro Bare-Metal development environment from AdaCore that are designed for safety-critical, real-time systems for the ARM M series processor architecture.