Simulation of the clock framework of Gaia

Details Simulation of the clock framework of Gaia Simulation of the clock framework of Gaia

2005-04-15

arxiv.org/abs/astro-ph/0504345v1

Astronomy and Astrophysics

Astrophysics

4 pages, 7 figures, to appear in the Proceedings of the Symposium "The Three-dimensional Universe with Gaia", 4-7 October 2004

Scientific paper

Gaia will perform astrometric measurements with an unprecedented resolution. Consequently, the electronics of the Astro instrument must time tag every measurement with a precision of a few nanoseconds. Hence, it requires a high stability clock signal, for which a Rb-type spacecraft master clock has been baselined. The distribution of its signal and the generation of clock subproducts must maintain these high accuracy requirements. We have developed a software application to simulate generic clock frameworks. The most critical clock structures for Gaia have also been identified, and its master clock has been parameterised.

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