https://www.forbes.com/sites/davidaxe/2023/09/30/the-russians-knew-exactly-where-to-strike-kharkivs-air-defenses-the-locations-were-in-soviet-archives/?sh=493e275e2e60
https://www.forbes.com/sites/davidaxe/2023/09/30/the-russians-knew-exactly-where-to-strike-kharkivs-air-defenses-the-locations-were-in-soviet-archives/?sh=493e275e2e60
These look like underground bunkers, so I don't know if they could remote sense it via drone or satellite. Maybe if they need to compulsively post their position on reddit? Also, why wouldn't the Russian Federation use documents of what the USSR built?
Underground or not, there is activity around a facility, if it's in use. Targeting everything USSR ever built in Ukraine might actually leave Russia with no missiles, not in ukronazis' wet dreams.