Professor José Meseguer is a Full Professor of Aerospace Engineering at the Universidad Politécnica de Madrid (UPM), and the Director of IDR/UPM, an Institute of UPM for Aerospace Research and Development activities; he has worked in several ESA/ESTEC contracts on thermal control (Spacecraft Thermal Control Design Data Handbook).Dr Isabel Pérez-Grande is Associate Professor of Thermodynamics at UPM, and the Head of the Thermal Control Division of IDR/UPM. She was responsible for the thermal control design and testing of the satellite UPM-Sat 1, as well as the thermal control of several instruments for ESA missions.Professor Angel Sanz-Andrés was the technical director of the satellite UPM-Sat 1, and is Full Professor of Aerospace Engineering at UPM; he is advisor in thermal and structural design in the development of several scientific space instruments. Member of the European Space Agency (ESA) "Physical Science Working Group (PSWG).