To get plots uploading to vlf.astronomy.me.uk
Admin
Need to run upload-v3.py on LRO-SIDS5 (134cm aerial with direct soundcard input).
April 2026
How to use Discovery Dish hydrogen line feed on LRO-H2 150cm Solar Cooker Radio Telescope Dish
Adapted from advice by Alex Pettit. Alex: The Illumination of the feed is determined by the dish<>feed spacing. For small dishes, beam forming choke rings consume too much area. The…
Sony A7 IV vs A7R III cameras — which is better for low light/astronomy work?
📸 1) Sony A7 IV vs A7R III — which is better for low light/astronomy work? 🧱 Key difference in philosophy 📊 Core specs that matter Feature Sony A7 IV…
Comparison Sony Alpha 99 II with Sony Alpha 7 IV cameras.
Here’s a clear, practical comparison of the Sony Alpha 99 II vs Sony Alpha 7 IV—they’re both excellent full-frame cameras, but they’re built on completely different generations and systems. 📸…
What is difference between Sony A99 and A99-II full-frame cameras?
The Sony A99 and A99 II are both full-frame A-mount SLT cameras, but the A99 II is a major generational upgrade in almost every area. Here’s a clear breakdown of…
Using 2nd order polynomial equations to flatten baselines on radio astronomy plots from amateur equipment
When I talk about “flattening the baseline,” I am talking about trying to remove a slow trend or curvature from my data. “2nd order” refers to a second-order polynomial—basically a…
Possible GNU Radio implementation of 2nd order polynomial baseline flattening
In GNU Radio, “2nd order baseline flattening” isn’t a single built-in block—you implement it by estimating a quadratic trend and subtracting it from your signal. Here are the practical ways…
Detection of hydrogen on LRO-H2 at LRO using Brian Coleman’s handmade hydrogen line feed
This data was collected using ezCol (Ted Cline’s ezRA suite of software). The dish is sold as a solar cooker for use on camping trips. It makes an effective hydrogen…
Internet Based Resources to go with exercises in Practical SDR Book (Course textbook on BAA GNU Radio Group)
https://www.astronomy.me.uk/wp-content/uploads/2026/04/Resources-from-Practical-SDR-website.zip
Jason Burnfield’s Hydrogen Line Drift Scan Analysis Tutorial for Galaxies outside the Milky Way on YouTube
https://youtu.be/D4ehWmEBhAE?si=U40XxTs1g43DUv4U