There are several public archives for radio astronomy. Find your favourite telescope which allows public proposals for observations and search for archive. e.g.

There are several public archives for radio astronomy. Find your favourite telescope which allows public proposals for observations and search for archive. e.g. VLA: https://science.nrao.edu/facilities/vla/archive/index https://science.nrao.edu/facilities/vla/archive/index ALMA: https://almascience.eso.org/alma-data https://almascience.eso.org/alma-data