There was experiments to test the performance of the different positioning frameworks with Starlink satellites before year 2024. The results showed meter level accuracy. The unprecedented results from these analyses show that, with an average of only three active Starlink satellites, a positioning solution with a 3D position estimation error of two meters can be ...

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Link :
https://www.nextbigfuture.com/2025/03/meter-level-gps-accuracy-using-spacex-starlink-satellites.html