ALSAT-2A solar array in orbit performances after 32 months

ALSAT-2A is the second Algerian Earth observation satellite build by Astrium together with the Algerian Space Agency and the first spacecraft of AstroSat-100 family. The spacecraft design is based on the Myriade platform and its power subsystem consists of GaAs solar array, Li-ion battery, power conditioning and distribution unit and harness. The purpose of a power subsystem is to ensure reliable delivery of electrical power compatible with payload under all foreseeable operational states, environments, and during all mission phases. The power subsystem is unarguably the most critical subsystem on a satellite. Reliability, efficiency and continuous operation of the power subsystem is essential to the successful fulfillment of ALSAT-2A mission, a failure even a brief interruption in the source of power can have catastrophic consequences for the spacecraft. Therefore, the power subsystem and its components, specially, the solar array must be checked carefully. In this context, this paper outlines the in-orbit performances of ALSAT-2A solar array wings from the period of July 2010 to March 2013. The 32 months telemetry data related to the solar array voltage, current and temperature will be analyzed. These parameters will be discussed in function of satellite power consumption.