I talked about the project to the Gaia representatives of the GBOT (Ground-Based Optical Tracking of Gaia) telescope network during the GBOG (Ground-Based Observations for Gaia) meeting in Heidelberg on 18-19 October 2012.
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The GBOT telescope network has some overlap with the other Gaia telescope networks:
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GSA - Gaia Science Alerts - for the verification (and later follow-up) of Gaia Science alerts based on sudden changes in magnitude.
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FUN-SSO - Follow-Up Network for Solar System Objects.
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It was agreed that it appears in principle very interesting to observe a nanosatellite for flux calibration from all these observatories. Both Project Altair and the coordination among Gaia networks is progressing, so I will keep the Gaia community updated on the nanosatellite until things are a bit more final. 
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Elena

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