3Cat 3 is a 6U CubeSat developed at the Universidad Politécnica de Cataluņa (UPC) as a study conducted for the Cartographic and Geologic Institute of Catalonia (ICGC) aimed at analyzing the feasibility of a small-satellite mission with a multispectral imaging payload. Apart from its low mass and volume, the ģCat-3 development is expected to leverage on the small-satellite philosophy, and to push its cost and development time to the minimum thanks to the integration of standardized platforms and subsystems, developed at the NanoSat Lab.