Abstract
Satellite is a technology that has a very rapid development, as evidenced by the variety of missions and sizes of satellites, one of which is nano satellites. The development of satellites is influenced by the complex space conditions and the potential for the development of satellites that can be applied to facilitate human life such as weather monitoring and communication systems. OBDH is a subsystem that is the control center of a satellite that builds coordination between subsystems and the process of retrieving some housekeeping sensor data, it makes the work of OBDH to be complex at the same time so that it requires an operating system capable of managing all the resources contained in the satellite. This subsystem functions as the main control for the nano satellite system, the OBDH subsystem is designed to use a microcontroller based on the Arm Cortex M4 type STM32F446RE as the main controller. The subsystem implements (Real Time Operating System) RTOS based on Mbed OS as the Operating System (OS) in the OBDH subsystem, this OS was chosen so that the system can run more efficiently in accordance with the advantages of RTOS.
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