Worldwide distribution of space weather service providers (indicated by national map and described in Table 1) and the primary instruments offering radio observations of space weather phenomena (outlined in Fig. 4 and Table 1). Green circles indicate the instruments that are space-weather dedicated, with orange circles indicating instruments that can perform solar observations but don’t do so routinely. Green triangles indicate the positions of the radio spectrometers of RSTN which provide routine SRB monitoring and alerts.