this post was submitted on 23 Nov 2023
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But if they had authentication you would know that the message doesn't come from a legitimate satélite.
If their isn't then there's a big problem with implementing that now, which would require a retrofit of every single GPS system currently in use and likely a replacement of all GPS satellites
Edit: I'm slightly mistaken, the military uses encryption but they don't have that open for public use.
I would hope whoever designed the satellites had the foresight to allow remote software updates.
Nah we just need a satellite mechanic astronaut