The PRETTY (Passive REflecTomeTry and dosimetry) CubeSat will perform slant geometry GNSS reflectometry from in orbit as well as radiation measurements - total ionising dose and single-event effects. This miniature ESA CubeSat is being developed by Beyond Gravity Austria (formerly RUAG Space), the Technical University of Graz, and Seibersdorf Laboratories. PRETTY is scheduled to launch in the second half of 2022.