The XUV Photometer System (XPS) is one of four solar irradiance measurement experiments that was launched in January 2003 as part of the Solar Radiation and Climate Experiment (SORCE). XPS measures the solar X-ray ultraviolet (XUV) irradiance.
Delivery of new Suomi NPP data ceases on Nov. 2, 2026. Users should transition to alternative products.
Suomi NPP data announcement