Radio Astronomy

VLF Radio Detection of SIDs (Very low Frequency detection of Sudden Ionospheric Disturbances)

VLF Settings for Spectrum Lab based on John Berman’s successful implementation of VLF/SID monitoring using this software 14/2/2025

Admin February 14, 2026 No Comments

https://www.astronomy.me.uk/wp-content/uploads/2026/02/John-Bermans-own-working-Spectrum-Lab-VLF-config-6-feb-2026.zip https://www.astronomy.me.uk/wp-content/uploads/2026/02/SID-Station-using-Spectrum-Lab-1.docx https://www.astronomy.me.uk/wp-content/uploads/2026/02/Spectrum-Lab-Manual.pdf https://www.astronomy.me.uk/wp-content/uploads/2026/02/Timing-errors-in-Spectrum-Lab-140226.pdf

VLF Radio Detection of SIDs (Very low Frequency detection of Sudden Ionospheric Disturbances)

Two successive massive complex SIDs today 1/2/2026, representing a sequence of multiple solar flares arriving at Earth

Admin February 1, 2026 No Comments

Just to finish off my posts on sudden ionospheric disturbances, there were two massive complex ones closely following on from each other today, representing a series of solar flares hitting…

VLF Radio Detection of SIDs (Very low Frequency detection of Sudden Ionospheric Disturbances)

Variable display of SIDs on SID monitors (Sudden Ionospheric Disturbances)

Admin February 1, 2026 No Comments

Interests me how different stations show quite different traces. Here is mine (Lichfield Radio Observatory www.astronomy.me.uk) from 21/1/2026: It shows a very impressive SID at about 1pm. My goto website…

VLF Radio Detection of SIDs (Very low Frequency detection of Sudden Ionospheric Disturbances)

Strangely narrow SID on 26/1/2026 around midday

Admin February 1, 2026 3 Comments

Strangely narrow SID on 26/1/2026 associated with C-class flare: From Lichfield Radio Observatory (my observatory in UK): Compare to SID Monitoring Station (https://sidstation.loudet.org/data-en.xhtml) – an excellent source of high quality…

Radio observation in hydrogen line (1420MHz)

If I want to make a bigger version of the SETI Horn of Plenty, still for 1420 MHz, how do I increase the dimensions?

Admin January 27, 2026 No Comments

Same frequency, physically bigger horn — not frequency scaling.This is where horns stop being “just scaled” and start being designed. Short answer first:You increase the aperture size, but you do…

Radio observation in hydrogen line (1420MHz)

How does flared section of hydrogen line horn antenna scale with changes in wavelength measured?

Admin January 27, 2026 No Comments

Short answer: it scales linearly with wavelength.Longer answer (the bit you actually care about 🙂): For a hydrogen-line horn (≈1420 MHz, λ ≈ 21 cm), the flare geometry is set…

Radio observation in hydrogen line (1420MHz)

Find me an URL for original SETI Horn of Plenty dimensions

Admin January 27, 2026 No Comments

Following is result of asking ChatGPT the above question 27/1/2026!!!! Here’s a source that actually describes the original SETI Horn of Plenty antenna design and its dimensions: 🔗 SETI League…

Easy Radio Astronomy Software (ezRA) Radio observation in hydrogen line (1420MHz)

Data .txt Files & Timelapse Video of Data Collection of comparison between ezCol.py & ezColGR (GNU Radio version) on LRO-H2(SCRT) using same 150cm dish, feed and SDR 24-25/1/2026

Admin January 25, 2026 No Comments

These are both relatively long integration times on the Intel i5 MiniPC used for this experiment. The numbers are not equivalent – in both cases I attempted to obtain an…

Radio observation in hydrogen line (1420MHz)

Data Collection Videos from LRO-H1(Ptarmigan Array) 23-24/1/2026 with use of ezColGR test GNU Radio Script

Admin January 24, 2026 No Comments

Screenshot: Data Collection Videos: Data Files: https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260123_13.txt https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260123_14.txt https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260124_00.txt

Radio observation in hydrogen line (1420MHz)

Dwingaloo 25m Radio Telescope (Netherlands) screenshot of live observation of Milky Way showing neutral Hydrogen line at Dopper shift 0 (1420 MHz) and also Doppler shifted spectrum (second peak to right of 1420 MHz peak)

Admin January 23, 2026 No Comments

VLF Settings for Spectrum Lab based on John Berman’s successful implementation of VLF/SID monitoring using this software 14/2/2025

Two successive massive complex SIDs today 1/2/2026, representing a sequence of multiple solar flares arriving at Earth

Variable display of SIDs on SID monitors (Sudden Ionospheric Disturbances)

Strangely narrow SID on 26/1/2026 around midday

If I want to make a bigger version of the SETI Horn of Plenty, still for 1420 MHz, how do I increase the dimensions?

How does flared section of hydrogen line horn antenna scale with changes in wavelength measured?

Find me an URL for original SETI Horn of Plenty dimensions

Data .txt Files & Timelapse Video of Data Collection of comparison between ezCol.py & ezColGR (GNU Radio version) on LRO-H2(SCRT) using same 150cm dish, feed and SDR 24-25/1/2026

Data Collection Videos from LRO-H1(Ptarmigan Array) 23-24/1/2026 with use of ezColGR test GNU Radio Script

Dwingaloo 25m Radio Telescope (Netherlands) screenshot of live observation of Milky Way showing neutral Hydrogen line at Dopper shift 0 (1420 MHz) and also Doppler shifted spectrum (second peak to right of 1420 MHz peak)

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