Where Your Location Actually Comes From — Log Every Navigation Satellite Talking to Your Desk

Your phone tells you where you are, and it never once shows you the evidence. It shows a blue dot — a conclusion, with the working scrubbed off. But underneath that dot, a receiver is listening to a specific set of satellites, each at a specific angle above your horizon, each arriving at a specific signal strength, and the receiver is throwing away every one of those facts before it draws the dot. This project hands them back to you. By the end you will have watched your own location get *assembled* — you will know how many satellites were involved, where in the sky they were, which ones were strong enough to use and which were merely visible, and why a location can be confidently wrong. That is the difference between trusting a blue dot and understanding one. It is also the cheapest possible introduction to radio, because these transmitters are twenty thousand kilometres away, they broadcast to everyone for free, and the receiver that hears them costs less than lunch.