[joushx]

What a wonderful example for the "standards" xkcd: https://xkcd.com/927/

Many countries in these days try to build their own alternative to GPS, or in this example a extension for it. This for sure makes the location mor accurate and the systems are independant from the united states.

On the other hand for instance mobile phones have to implement all these systems and this makes them much more expensive and complicated. From my point of view it would be better to build up a universal international system. Yes, and I know this is nearly undoable.

[cyanoacry]

In this case, Japan's move makes sense. The satellites are placed into an orbit so that they can be seen high in the sky, which is impossible to do for all locations on the earth.

At some point, you need to break up the augmentation systems on a continent/country-wide basis so that you can optimize the satellite orbits to work for you, instead of against you.

Additionally, QZSS seems to be pretty similar to WAAS. I get the feeling it's probably the same sort of system (though I haven't taken a look), so it's likely easy to implement from a GPS chip perspective.

[dfc]

This has nothing to do with that XKCD comic. Did you read the article? This system is not "independent of the US," it augments the GPS system.

[joushx]

Yes. Did you read my comment? "[...], or in this example a extension for it"