The “Solar-SONG” project was funded in 2016 -once demonstrated its viability and scientific interest (P L Pallé et al 2013), with the objective to complement SONG capabilities with continuous (daily) observations of Sus-as-star by means of an automated solar tracker and a high performing solar fibre optical system feeding the slit of the echelle spectrograph.
The objective and challenge of this project is twofold; On the one hand, to carry out continuous observing campaigns to enable Sun-as-star Helioseismology studies (integrated or at different spectral lines simultaneously) and, on the other hand, engage with long-term (years) synoptic observations of both the RV and the high-resolution solar wavelength spectrum to derive different proxies of the solar magnetic activity.
The whole system was successfully implemented in May 2018 and we undertook a 2-month continuous campaign of high-cadence (\sim 4 s.) solar observations of the echelle solar spectra (~\sim 12 000 per day) that allowed a high precision RV determination (uncertainty of about 0.75 m/s per point).
In this contribution, the “Solar-SONG” project and the preliminary results of the analysis of the two-month time series (characterisation of the spectrum of solar oscillations) will be presented. Further, its role, perspectives and synergies in the context of on-going and future initiatives for continuous monitoring of the Sun-a-star, will be discussed.