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Re:Drone Footage of Arecibo Observatory Collapse by Someone on Thursday December 03, 2020 @01:07PM (#25292215)
For those interested: FAST has a diameter of 500m, compared to 300m for Arecibo (https://en.wikipedia.org/wiki/Five-hundred-meter_Aperture_Sp...)

There’s also https://en.wikipedia.org/wiki/RATAN-600, with a diameter of 575m, but that isn’t a fully filled dish.

Re:Drone Footage of Arecibo Observatory Collapse by LeoPanthera on Thursday December 03, 2020 @01:51PM (#25292854)
Though, as the linked article explains, you can’t use the entire 500m as a single aperture. You can only use 300m of it at a time, but you can “point” it in different directions by using different 300m windows.