https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL09...
The raw position accuracy at 100 ns is better than 10 m.
They are receiving Sferics on the lower HF frequencies and tag them with GPS timestamps (with the PPS signal they are in the Nanoseconds precision range). A central server will then do the triangulation.
All with off-the-shelf hardware (STM32, etc.).
Their service is stable for many many years now.
(Offtopic: The STM32H7 ADC is great for many many things)
Was a fun experiment: https://www.dm5tt.de/2025/07/26/thunderstorm-detector-with-m...
Edit: you’re reading at 400 Hz so you’ll read phenomena below 200 Hz
Going to write the ferrite core on my next shopping list.
Is it any different from the ADC on other MCUs?
I also work a lot with ESP32s. Their ADCs (non-linearity, and with the integrated calibration you loose resolution) don't make too much fun.
The former seems to have better coverage especially across the southern hemisphere.
Like at the ECMWF: you can have a look at all beautiful charts for free. But if you want to have the data behind them they want to see big cash.
[1] https://www.ecmwf.int/en/forecasts/datasets/open-data
[2] https://www.ecmwf.int/en/about/media-centre/news/2025/ecmwf-...
Still cool!
https://en.wikipedia.org/wiki/Hyperbolic_navigation ("Hyperbolic navigation")
https://en.wikipedia.org/wiki/Omega_(navigation_system) ("Omega (navigation system)")
> "OMEGA was the first global-range radio navigation system, operated by the United States in cooperation with six partner nations. It was a hyperbolic navigation system, enabling ships and aircraft to determine their position by receiving very low frequency (VLF) radio signals in the range 10 to 14 kHz, transmitted by a global network of eight fixed terrestrial radio beacons, using a navigation receiver unit. It became operational around 1971 and was shut down in 1997 in favour of the Global Positioning System."
[0] - https://hjelp.yr.no/hc/en-us/articles/9260735234076-Lightnin...
zeristor•5mo ago
I can’t find a way to the current maps of lightning strikes.
nvalis•5mo ago
[0]: https://wwlln.net/#maps