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The Astronomy Observatory is in charge of SNO1’s service tasks, planned and labelled by INSU. These tasks concern Laser Telemetry, Solar System Ephemeris, the Microscope mission, Reference Systems and Altimetry, the T2L2 space mission.

The work inherent to these tasks is international in scope, through the network effect (laser telemetry, T2L2 space mission) and/or through the unique side of know-how or involvement (Solar System and Moon Laser, Microscope space mission). They comprise three main components: Instrumentation, Observations, Validation and Data Processing. The Astronomy Observatory collaborates with the Geodesy Observatory, with which it shares its tools in particular.