Would it be possible to pick up modern OTH radar signals out of curiosity using amateur radio equipment, such from the Nostradamus one you mention?
I believe it was possible to pickup the Russian Duga system.
I believe it was possible to pickup the Russian Duga system.
These are still a source of interference on the amateur bands. You can find more info on that at https://www.iaru-r1.org/spectrum/monitoring-system/iarums-r1...