  Since 2012, thanks to the installation of the high resolution echelle
spectrograph in the optical range HARPS-N, the Italian telescope TNG (La Palma)
became one of the key facilities for the study of the extrasolar planets. In
2014 TNG also offered GIANO to the scientific community, providing a
near-infrared (NIR) cross-dispersed echelle spectroscopy covering 0.97 - 2.45
micron at a resolution of 50,000. GIANO, although designed for direct
light-feed from the telescope at the Nasmyth-B focus, was provisionally mounted
on the rotating building and connected via fibers to only available interface
at the Nasmyth-A focal plane. The synergy between these two instruments is
particularly appealing for a wide range of science cases, especially for the
search for exoplanets around young and active stars and the characterisation of
their atmosphere. Through the funding scheme "WOW" (a Way to Others Worlds),
the Italian National Institute for Astrophysics (INAF) proposed to position
GIANO at the focal station for which it was originally designed and the
simultaneous use of these spectrographs with the aim to achieve high-resolution
spectroscopy in a wide wavelength range (0.383-2.45 micron) obtained in a
single exposure, giving rise to the project called GIARPS (GIANO-B & HARPS-N).
Because of its characteristics GIARPS can be considered the first and unique
worldwide instrument providing not only high resolution in a large wavelength
band, but also a high precision radial velocity measurement both in the visible
and in the NIR arm, since in the next future GIANO-B will be equipped with gas
absorption cells.
