Building a GPS receiver
Have you ever noticed that your Maps app still works during a flight? It can feel illicit, like someone just forgot to turn off the signal, and that watching yourself crawl along the earth should be done without drawing undue attention. A few months ago I learned that there were only around 30 GPS satellites serving the entire planet. This piqued my interest, because it reminded me of the 13 root DNS servers from which all resolution flows. Perhaps GPS has a similar design in which the ‘source of truth’ is diluted by several layers of signal repeaters? I navigated to gps.gov, and was presented with this delightful image. I became even more excited to learn about what these satellites do! Shortly after publishing my iOS 4 jailbreak last October[1], I got to work on my next hobby project: a from-scratch homebrew GPS receiver, which can solve the user’s location solely from billions of radio antenna samples.
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Orbit
nagylukas.github.ioAR satellite tracker, watch 15k+ objects
Aegir GPS/LTE/Iridium Tracker
Standalone IOS app to spoof GPS location without jailbreaks. Untethered, local, and open source.
Open-source intelligence for the global theater. Track everything from the corporate/private jets of the wealthy, and spy satellites, to seismic events in one unified interface. Hook an AI agent up to have it parse through data and find previously unseen correlations. The knowledge is available to all but rarely aggregated in the open, until now.
I'm a solo developer having fun learning Go.