GPS Selective Availability
Discussions focus on the historical US policy of Selective Availability that intentionally degraded civilian GPS accuracy, its discontinuation in 2000, and comparisons to other GNSS systems like GLONASS, Galileo, and BeiDou as backups or alternatives.
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They share GPS, it used to be low-res but is now the real deal:https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_...
Selective Availability being phased out and is no longer a feature on the most recent GPS satellites:https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_...
You are thinking of “selective availability” which was turned off over 20 years ago https://www.gps.gov/systems/gps/modernization/sa/
By "another GPS" do you mean a different satellite in the same network, or a different GNSS?
Any insight as to why newer GPS satellites do not offer similar capabilities?
The feature is called "Selective Availability", and has been disabled since May 2000.https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_...
Doesn't the government add a small amount of variance to the GPS signal to limit its accuracy for non-military users? Or did they stop doing that?
GPS had this capability, and it was turned off: https://en.m.wikipedia.org/wiki/Error_analysis_for_the_Globa...
GPS is american, Europeans have the Galileo system, and the russians have glonass. aren't those a backup plan
Civilian GPS signals used to have intentional error added, but that was ended in 2000:https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_...