Shillforbigusername t1_j5rjl7x wrote
Reply to comment by Volcan_R in TIL that the European Union developed a satellite navigation system called Galileo, which can provide an accuracy of up to 20 cm (0.7ft) on smartphones, while GPS only reaches around 3 meters (10ft) by apeowl
Isn’t that additional inaccuracy a thing of the past? I googled it because I was unfamiliar with the concept and came across this:
> Doesn't the government degrade civilian GPS accuracy?
>No. During the 1990s, GPS employed a feature called Selective Availability that intentionally degraded civilian accuracy on a global basis.
>In May 2000, at the direction of President Bill Clinton, the U.S. government ended its use of Selective Availability in order to make GPS more responsive to civil and commercial users worldwide.
>The United States has no intent to ever use Selective Availability again.
bellendhunter t1_j5sng78 wrote
There is indeed a more precise GPS signal for military use. It requires crypto keys to use it. Can’t remember the specifics but I think GPS has a completely separate signal for it.
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