31–34 of 34 posts
Earlier quoted context omitted.
Thanks a ton! Was afraid that that's the answer - and that there's no reasonably priced aggregator/abstraction layer, eg like https://open-meteo.com for ECMWF.
Open-meteo does have ECMWF data and forecasts. Free for non-commercial use. I think the person behind open-meteo is on HN.
There's also Blitzortung.org which is a very interesting project. 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 thin…
> The STM32H7 ADC is great for many many things 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.
[0]"The sensors are basically a bearing antenna with a very accurate clock and a computer. A lightning discharge has a "signature" that allows the sensor's software to distinguish lightning discharges from all the other electrical noise in the world." [0] - https://hjelp.yr.no/hc/en-us/articles/9260735234076-Lightnin...
What is the diameter of each point? Aka how localised can they determine where the lightning is? Are we to assume the centre is where the lightning is? As I can't seem to find this information which I feel would be quite useful.
> When the time of group arrival is measured with 100 ns absolute accuracy by several widely spaced receivers, it is possible to locate lightning to within https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL09...
The raw position accuracy at 100 ns is better than 10 m.