LightningMaps.org gets its data from a volunteer-run global lightning detection network called Blitzortung.org, which is then visualized on LightningMaps.org. Here’s how it works:
⚡ Lightning Detection & Data Collection
• VLF (Very Low Frequency) antennas (3–30 kHz) listen for the radio pulses—“sferics”—emitted by lightning strikes .
• Each antenna is precisely located via GPS and timestamps every detected pulse with microsecond accuracy .
From Reddit’s ExplainLikeI’mFive:
“Each of these antennas have their location known by GPS … and triangulates the strike”
“They use radio waves … precisely measure the time … and use the speed of light … triangulate”
📍 Triangulating Lightning Locations
• The time difference of signal arrival between stations creates hyperbolic curves of possible strike locations .
• Once three or more stations detect the same pulse, the system calculates the intersection point to determine the strike location .
• Blitzortung.org processes all this in real time, usually within seconds, and shares the lightning event data publicly for the last couple of hours .
🌐 Role of LightningMaps.org
• LightningMaps.org is a frontend that takes Blitzortung.org’s data and displays it on interactive maps, often with satellite overlays .
• It uses the MyBlitzortung open-source PHP application—also what users install if they want to host their own local maps .
• The site periodically polls Blitzortung.org via its API or UDP streams, updates the strike data, filters it, and renders the visual output .
🛠 Behind the Scenes: Data Format & Handling
• Raw signal data can be requested as UDP streams or JSON via Blitzortung.org .
• This raw data includes station ID, GPS position, nanosecond timestamps, and waveform samples .
• LightningMaps.org (using MyBlitzortung) fetches this data every minute or so, computes positions, and updates the maps accordingly .
🧑🤝🧑 Volunteers & Accuracy
• Blitzortung runs on approximately 1,800 volunteer stations in over 80 countries .
• Stations are typically spaced 50–250 km apart, giving accuracy often within 1 km, though false readings can occur and strike types aren’t distinguished .
📝 Summary Table
Component Function
Blitzortung.org Collects VLF signals using volunteer antennas, timestamps with GPS, then computes lightning locations via TOA.
LightningMaps.org Fetches Blitzortung data, processes it with MyBlitzortung, and displays it on interactive maps with overlays.
In short:
Data originates from ground-based, GPS-synced antenna stations. Signals are timestamped, sent to central servers, located via triangulation, and then picked up by LightningMaps.org, which maps them in near real-time.
Let me know if you want details on the hardware, data flow, or how to access their raw API!
No comments:
Post a Comment