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.
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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. We used a tennis ball to avoid damage. The Chief Engineer was wicket keeper. I'm bowling.
@slowe that is amazing , hell of a memory.
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@slowe This is the same place Tom Scott recently made a video about! He went up onto the surface and everything!
@krutonium Good to see that Mirza is still a controller.
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@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
@outinthehills Yep. My research was building and using receivers at the relatively short wavelength (for Jodrell) of 1cm. Not on the Lovell but on a 32m telescope in Poland. The surface had to be set to mm accuracy. I had waveguides that I described as radio plumbing (my dad had been a plumber). It was very human sized even if the dishes weren't!
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@khleedril @slowe Lovell was the nicest genius I’ve ever met. When I was (briefly) at Jodrell in ‘94, he’d retired a few years prior, his wife had died the year before, and so he’d come into Jodrell most days and sit in the common room, chat with his former students (now running the lab), drink tea, and listen to Test Match Special.
I still have a newspaper article he cut out and kept for me because he thought I’d like it.
@gmh @khleedril Sir Bernard was still coming in occasionally in the 2000s. You'd sometimes see him in the Tea Room. Here's a picture I took when The Sky At Night came to visit in 2007.
The two of them filmed a bit to camera outside by the telescope and it started to rain. So Chris Lintott and I held umbrellas over them just out of shot.
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@slowe This is the same place Tom Scott recently made a video about! He went up onto the surface and everything!
@krutonium @slowe I really enjoyed that episode
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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. We used a tennis ball to avoid damage. The Chief Engineer was wicket keeper. I'm bowling.
This is the kind of wonderful weirdness that good social media provides, and this absolutely made my morning brighter.
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@krutonium @slowe I really enjoyed that episode
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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. We used a tennis ball to avoid damage. The Chief Engineer was wicket keeper. I'm bowling.
Thanks for sharing your photos and experiences.
Here’s a quick timelapse I took of it swinging into place to be used as the projection screen during the bluedot festival.
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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. We used a tennis ball to avoid damage. The Chief Engineer was wicket keeper. I'm bowling.
This is the kind of content I subscribed to twitter for - in these old times...
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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. We used a tennis ball to avoid damage. The Chief Engineer was wicket keeper. I'm bowling.
@slowe What's the equivalent of "optically perfect" in terms of damage on that surface? A centimetre or so?
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@slowe What's the equivalent of "optically perfect" in terms of damage on that surface? A centimetre or so?
@_thegeoff As I remember it, you want a surface smooth to 1/8th wavelength or better. So, to observe at 6GHz (5cm) the average (root mean square) deviation should be roughly half a centimetre or better. You get deviation within panels on the surface, between panels, and due to the overall shape changing at different elevations. This page from 2008 talks about surface setting https://www.jb.man.ac.uk/tech/lovellupgrade/adjust.html The image shows deviations from a parabola across the dish before they tuned the surface.
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J jwcph@helvede.net shared this topic
