The Telescope metrology Control Unit (TCU) on-board the ARIEL space mission

Abstract This paper will describe the on board metrology of the subsystems related to the Telescope Control Unit (TCU) of the ARIEL Mission, proposed in the framework of the ESA M4 call. It introduces ARIEL mission and its opto-thermo-mechanical requirements in order to fully understand the proposed baseline design for the TCU electrical subsystem.