@slowe haha when you're used to dealing with optical telescopes, then you realise that at radio frequencies tenth of a wave optics won't be affected by footprints on the mirror 
O
outinthehills@mastodon.scot
@outinthehills@mastodon.scot
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I once played a very brief game of cricket in the Lovell Telescope (after a resurface but before it got properly tuned) because we wanted to recreate a scene from The Dish.