This tool provides a forecast of times targets cross the Gaia Focal
Plane.
It is based on the scanning operations of Gaia. It does
not take into account operational activities preventing nominal
observations nor matters like, e.g., the gaps between CCDs on the
Focal Plane.
Adding up all dead time components, users should understand
that the probability of the data of the target being received on the
ground at the indicated time is about 80%.
Furthermore, only targets in magnitude range 6<G<20 mag are
observed in astrometry and photometry and 6<G_RVS<16 mag in spectroscopy,
except during Galactic Place Scanning periods when the RVS magnitude limit is
lowered to 14 mag. The expected end of the Gaia mission operational phase is
predicted to early 2025.