The Stellar Population at intermediate redshifts Survey is a project which comprises two campaigns
of spectroscopic observations: WEAVE-StePS and 4MOST-StePS. These projects aim at
characterizing the stellar population properties for a large sample of galaxies at intermediate redshift (z=0.5)
with unprecedented accuracy.
WEAVE-StePS will observe about 25,000 galaxies with the WEAVE multi-object spectrograph mounted on the William Herschel Telescope (Spain).
On the other hand, 4MOST-StePS will observe more than 3,000 galaxies with the 4MOST multi-object spectrograph
mounted on the VISTA telescope (Chile).