Sensors and Actuators of the Alsat-1 First Algerian Low Earth Orbit Observation Microsatellite ln Orbit

This paper describes the attitude determination control system for earth observation (imaging mode) on Alsat-1 first Algerian micro satellite in orbit. The attitude determination sensor required is a magnetometer and sun sensor and the actuator required is a Y/Z wheels and magnetorquer coi !. ln addition the in orbit results obtained by telemetry from the ground station are much better than the Alsat-1 mission requirements.

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