Initial Positive Data 134cm VLF Aerial with direct input into USB Soundcard LRO 25/2/2026
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VLF Radio Detection of SIDs (Very low Frequency detection of Sudden Ionospheric Disturbances)
Setting up LRO 134cm VLF Aerial with direct input into USB Sound Card (except for 10 uF capacitor on one arm of input) on LRO-PC-10 mini-PC with Spectrum Lab software for continuous monitoring starting 21/2/26@18:00 UTC
Working configuration file on Spectrum Lab Software: https://www.astronomy.me.uk/wp-content/uploads/2026/02/LRO_VLF_Config_works-with-134cm-aerial-LRO-PC-10-210226@1800.zip Plot from Spectrum Lab showing the 5 stations being monitored & photo of the 134cm VLF aerial:
First Light LRO 134cm VLF Aerial with Direct Sound Card Audio Input (10 uF capacitor on one arm) 20-21/2/2026
I am grateful to the help of John Berman on this project – I based the arrangement at LRO on his design. It uses Spectrum Lab Spectrum Analyser software, and…
I am making VLF aerial out of 22 SWG enamelled copper wire about 150m long, wound around a wooden cross multiple times. How important is exactly length of the wire?
For a VLF receiving loop, the exact wire length is usually far less critical than people expect. At VLF (about 3–30 kHz): So you are not building a resonant half-wave…
Success using direct USB audio soundcard input from VLF aerial (with serial 10 uF capacitor) at LRO 20/2/2026 @ 21:20 UTC
Success with detection! Bits and pieces arrived to make new aerial – and attached are test screenshots from Spectrum Lab – 6 stations seen clearly. This time, for some reason,…
How big is the area of a cosmic ray burst is at ground level?
This question is relevant to considering how close two observers need to be to each other in order to observe the same muon cascades, and hence obtain similar muon detections/have…
Spectrum Lab spectrum analyser software when I update the horizontal speed settings on the plotter it does not change the speed on the plot
If the horizontal speed in Spectrum Lab isn’t changing on the scrolling plot, it’s usually because the display timing is controlled somewhere else. In Spectrum Lab, the time axis speed…
First light LRO VLF Detection system based on direct input from aerial into sound card and Spectrum Lab software 14/2/2026 and demonstration that 23.4 kHz reception best with aerial pointed in different direction to frequencies of other VLF transmitters detected in UK
Settings on plotter in Spectrum Lab software – the title is the frequency of the VLF transmitter observed in kHz: Plot from first light at LRO on Spectrum Lab –…
VLF Settings for Spectrum Lab based on John Berman’s successful implementation of VLF/SID monitoring using this software 14/2/2025
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