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Didn't they actually remove selective availability from the new sat's that were launched. https://web.archive.org/web/20080113123316/http://pnt.gov/public/sa/
by Crosseye_Jack 5y ago
Didn't they actually remove selective availability from the new sat's that were launched.
https://web.archive.org/web/20080113123316/http://pnt.gov/public/sa/ https://web.archive.org/web/20080113123316/http://pnt.gov/pu...
> In September 2007, the U.S. Government announced its decision to procure the future generation of GPS satellites, known as GPS III, without the SA feature. Doing this will make the policy decision of 2000 permanent and eliminate a source of uncertainty in GPS performance that has been of concern to civil GPS users worldwide for some time.
- pmorici 5y agoI think it is a moot point because there are 5 position constellations now days (US, EU, China, Russia, Japan) and many popular consumer chipsets can use multiple if not all of them.
- KennyBlanken 5y agoIt's not moot for aviation, where GPS units can be decades old, in part due to how expensive avionics are due to an absolutely mind-boggling amount of FAA regulations. The FAA is a giant lumbering dinosaur that spends a lot of time making sure private pilots generate huge reams of paperwork and restricting the kinds of equipment that can go into various categories of planes, when the overwhelming majority of GA crashes are 1)controlled flight into terrain and 2)running out of fuel. We'd have a lot less controlled flight into terrain if the FAA would unclench its avionics regulations asshole. Thankfully anyone can run an iPad with Foreflight, or any number of iOS and Android apps, that provide rudimentary terrain awareness and backup navigation.
- takk309 5y agoI was unaware of that. Thank you for the bit of knowledge!