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…
The weather forecast for the forthcoming week in Lichfield is lots of cloud and rain. Even where episodes of sunshine break out, these will be brief, and rapidly give way…
On a headless Raspberry Pi, the simplest way is just via SSH and a couple of built-in Linux commands—no GUI needed. Quick & easiest (recommended) Run: You’ll get something like:…
Let’s troubleshoot this step by step—on a Raspberry Pi 4, Baobab can fail for a few common reasons. First: what exactly happens? When you try to run it: If you…
What you did should work in principle, but there are a couple of very common gotchas when cloning Raspberry Pi SD cards—especially when increasing size. Let’s go through the likely…
wire dia : #18 ga or so is fine .. Nothing is exact .. or perhaps reworded ” It is impractical to attempt to derive an equation for the electrical…
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…
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