INTEGRAL RCS : Launch Site Operations and In-orbit Behavior

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory) Spacecraft was launched from Baikonur on October the 17th 2002. The Spacecraft Propulsion (RCS) is a monopropellant system, using anhydrous hydrazine and 20 N thrusters. It was loaded and pressurised at the Baikonur filling facilities prior the launch. The outcomes of this activity together with a correlation with the tanks loading procedure are given. During LEOP the behaviour of the RCS was recorded via the telemetry by the three Pressure Transducers, the TCS thermistors and by the thrusters thermocouples. The above parameters allow determining the proper status of the system and its functional behaviour. During the LEOP an anomalous temperature evolution was detected on a line spot downstream the tanks.

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