Data Availabilty plots can be found on the UofC Space Physics Data Portal 
at the below link. This information is updated every 1 to 7 days.

http://data-portal.phys.ucalgary.ca

To find the plots on the data portal, select "Data Availability" on the top 
navigation and then use the left sidebar to select the GO-Riometer page 
that you are interested in.