GPS only uses 32 satellites

Создано 2022-05-11 · Обновлено 2022-05-20

One notable resident of medium Earth orbit is the GPS system … I never realized that the entire GPS system, a US Department of Defense project that went live in 1995, only uses 32 satellites total. And until 2012, the number was only 24—six orbits, each with four satellites. But you can see in the GIF below that even with 24, a given point on the Earth can be seen by at least six of the satellites at any given time, and usually it’s nine or higher

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