Who operates Gaia?
During launch, Gaia was operated from the European Space Operations Centre (ESOC, Darmstadt, Germany), using the ground stations at Perth (Australia) and Kourou (French Guiana).
When Gaia was in orbit, and during normal operations, ESA’s most powerful ground stations – the 35 m-diameter Deep Space Antennas at Cebreros (Spain) and New Norcia (Australia) – were used to relay information to and from the spacecraft via ESOC.
Science operations were conducted from the European Space Astronomy Centre (ESAC, Villafranca, Spain).
Gaia communicated with Earth for an average of about 8 hours each day. During this time, it transmitted its science data and ‘housekeeping’ telemetry signal. Although the spacecraft was 1.5 million kilometres away, it was able to maintain its transmission at an extremely high data rate (~ up to 7.5 Mbit/s).
The Gaia Data Processing and Analysis Consortium (DPAC), which consists of more than 400 individuals, processes the data. Over the course of its mission, Gaia’s data archive will exceed 1 Petabyte (1 million Gigabytes), equivalent to about 200 000 DVDs worth of data.
