#g7izu โ Public Fediverse posts
Live and recent posts from across the Fediverse tagged #g7izu, aggregated by home.social.
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Radio Propagation
I'm pretty happy with my AIS coverage as reported by Marine Traffic following yesterday's very brief bump in tropo propagation. I even had hits from the west coast of Scotland and The Netherlands!
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Radio Propagation
High pressure over Northern Europe is producing tropospheric ducting, extending the range of VHF and UHF signals.
My AIS station in Plymouth is receiving ship AIS signals from over 250nm (460km) away across the English Channel and into the Bay of Biscay.
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Space Weather
Proton and electron fluxes are rising following a filament eruption.
The proton flux at L1 (EPAM) has risen slightly. The flux near Earth for Goes >=10MeV is "elevated" and currently below S1 level, but is rising. Minor polar cap absorption will affect HF propagation near polar regions, and GPS positional quality will be degraded.
An earth-facing coronal hole will cause increased solar wind effects and geomagnetic activity in a day or two.
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The NESO Electricity Margin Notice has been cancelled, presumably because sufficient energy margin has now been found.
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UK National Grid issues a "reduced margin" notice for the Eclipse
The UK's National Electricity System Operator (NESO) Electricity Control Centre has issued an "Electricity Margin Notice" covering a four hour period around the partial solar eclipse on Wednesday.
At the peak of the eclipse just after 17h UT, 90-95% of the sun will be obscured over the UK, cutting the power that PV solar cells can produce substantially for a period of time by up to 1760 MW. This, combined with the evening peak demand, has prompted NESO to issue the notice.
The Electricity Margin Notice is not a warning of impending power cuts. Instead it's letting the power generation industry know that there's a period when the safety margin will be reduced more than they want it to be, and therefore inviting flexible generation options to be made available at short notice should it be required. This is a normal type of request for this kind of event.
The full text of the notice in shown in the fourth image.