Which fields are of concern and what volume is of concern?

I'm aware of Australian weather radar information being located currently in OSM (before any changes I have made), the BOM website, WMO Weather Radar Database, and ACMA RRL database. For many fields, the same information exists in multiple sources. For example, the WMO Weather Radar Database and ACMA RRL databases both share information about the frequency, power output, elevation and antenna. All four sources share some rough (not always the same) coordinates, which are not kept anyway. They also all provide a name which generally differs between source. If anything, the ability to retrieve/consolidate fields from multiple sources indicates to me a better approach may be to keep such information in Wikidata (most radars I think have a Wikidata item someplace) and remove the detailed fields from OSM to avoid duplication. Wikidata has the benefit of allowing 4 names to be listed (and one chosen as preferred), with all 4 names referenced to one of the 4 different sources.

Other fields are mostly just standard OSM fields that would get added to any weather radar such as `monitoring:weather=yes`.