The information provided on this website is provided for reference purposes only, No warranty is provided for its use. You should check information provided with independent data sources before using…
Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: https://www.astronomy.me.uk/wp-content/uploads/2026/04/Alex-Pettit-constructing-umbrella-antenna-cakepan-loopfeed-acc-170426.pdf
Jason Burnfield’s Excel Spreadsheet Design Tool and Instructions for his 150cm Mini Radio Telescope Dish: Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: Cold…
Alex Pettit’s Project: H-Line 3D on Github: https://github.com/AP-HLine-3D/HLine3D
Ted Cline’s Easy Radio Astronomy (ezRA) Software Suite: https://github.com/tedcline/ezRA
Many of the posts in the blog have discussed the development and use of hydrogen line radio telescopes, which work by pointing at the same azimuth and elevation, and on…
Cold Sky vs Hot Ground: Here’s a quick test which will verify all is okay with your hydrogen line radio telescope: The difference between 10K cold sky & 290K Earth…
Corrected version of Jason Burnfield’s Design Tool: Hi Andy, This is the latest version of my Excel spreadsheet with design sheets for my original 2.74 meter dish, my mini dish,…
Hi Andrew, welcome to the SID community! Your first data appearedtoday. Unfortunately, there are some problems with the data. Here’s anexample of what we have received: NEW/StMichaels_CUTLER_2026-04-15_000000.csvignoring bad data line:…
https://www.gb.nrao.edu/cgi-bin/radvelcalc.py?UTDate=2026%2F04%2F11&UTTime=12%3A00%3A00&RA=20%3A23%3A00&DEC=40%3A00%3A00
Short answer: no – 0.3 dB does NOT correspond to a 50 K antenna temperature increase (unless your system temperature is very high). P2 / P1 = 10^(0.3 / 10)…
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