Hi Marcus Leech (and Muller), Well you beat me to it!
It’s great that you can pre-confirm my results. I’ll have to look at the rest of your memos. Do you mind if we cross-post your memo CERRA memo, as a LightWork memo too? Maybe it will be better to just reference your memos on the LightWork page. Just thinking while typing… You produced a beautiful spectrum of the Milky Way, if you love that kind of thing, like I do! Calibrating, by looking at the Ground, is pretty reliable and easy. Cheers Glen > On May 2, 2023, at 7:03 PM, Marcus D. Leech <patchvonbr...@gmail.com> wrote: > > On 02/05/2023 18:58, Marcus Müller wrote: >> Hey Glen, >> >> this is really cool stuff! >> >> Tried to give this a bit of reach on Mastodon [1], but I'm far from the >> audience I used to have on twitter. >> >> It's pretty cool that a galvanized pail does the job so well, would have >> thought zinc wouldn't be low-loss enough a surface coating, but was proven >> wrong by awesome results :) The best case of being wrong! >> >> I especially like that this is a solution that needs so little "craftiness" >> and seems quite robust. Just drill a hole, watch (and then obviously like) a >> few videos and send Glen an email to get a free feed :D >> >> If I had one complaint, it's that you promise a shopping list in the >> appendix – but there's no appendix! >> >> I'd also state very early in the guide (maybe actually with a flashy yellow >> "sticker" on the title page?) that it comes with video documentation (30 min >> in total[2]). I think that's quite a relief to a teacher who doesn't want to >> risk building something new based on text only, especially when it involves >> mechanical work! >> >> Cheers, >> Marcus >> >> PS: I think if you're really going to leave it out in the weather, maybe add >> a Polymeric Low-Absorption Small-Thickness Inherently Costefficient Best-fit >> Antenna enGulfing (PLASTICBAG) radome? >> >> >> [1] https://mastodon.social/@funkylab/110301361379949802 >> [2] For those wondering: these videos: >> https://www.youtube.com/playlist?list=PLFMYhHhJW1VDYESTcHJIiwNbRQXWpFlyF >> >> On 02.05.23 16:53, Glen Langston wrote: >>> Hello Aficionados! >>> >>> We’ve just released a marvelous summary of how to build a “Pail of Milky >>> Way” >>> horn radio telescope. This is described in LightWork memo 32. >>> >>> https://github.com/WVURAIL/lightwork/blob/master/memos/LightWorkMemo032-PailOfMilkyWay-r5.pdf >>> >>> >>> The memo concludes with a plot of one day’s observations, showing >>> what you can see with a horn radio telescope. The Doppler shifted >>> Cygnus and Perseus Spiral arms of the Milky Way are visible. >>> >>> Comments and improvements welcomed. >>> >>> Data are all obtained using Gnuradio designs available from the DSPIRA web >>> site. >>> https://github.com/WVURAIL/gr-radio_astro >>> >>> Thanks to Kevin Bandura at WVU and the Green Bank Observatory Staff. >>> >>> Cheers >>> >>> Glen >>> >>> >>> >>> >> > Some of this reminds me of the memo I published 1.5 years ago on a similar > subject: > > http://www.ccera.ca/files/memos/ccera-memo-0014.pdf > > >