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ESA/ESAC
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Abstract Reference: 31225
Identifier: P8.24
Presentation: Poster presentation
Key Theme: 8 Other

Gaia Downlink and Uplink Processing

Authors:
Siddiqui Hassan, Cheek Neil, Guerra Rocio, Osinde Jose

Gaia is a survey mission with the aim to determine the positions, distances and proper motions of some 1.2 billion stars. Launched at the end of 2013, it is now in its third year of operations, processing typically 40 GB of compressed raw telemetry per day and at the time of writing the first Gaia Data Release will be made available to the general public. This poster describes the downlink processing from raw telemetry from the spacecraft up to the intermediate level where initial estimates of star positions are computed, and the uplink system where payload change requests are issued in order to optimise the performance of the payload. Problems, challenges and lessons learnt are discussed.