ETRSS-1 attitude and orbit control subsystem and on-orbit 1 performance analysis

9 The Ethiopian remote sensing microsatellite, weighing 65 kilograms, was successfully launched 10 into space in December 2019 from the Taiyuan launch facility, with the mission of collecting 11 earth imagery data to assist Ethiopia in combating climate change. The satellite is controlled 12 from a sun-synchronous orbit at an altitude of 628 kilometers by a ground control station on 13 Mount Entoto. The purpose of this paper is to provide an overview of the ETRSS-1 satellite 14 system, including its development and integration with AOCS subsystems, as well as its per-15 formance in orbit. Furthermore, the hardware used in the development of the satellite's AOCS 16 will be discussed, and on-board telemetry data from the system will be analyzed to determine 17 its current status. 18