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Well, only sort of: GPS is the initialism for a specific system (and QZSS provides corrections for that particular system's satellites, among other things), not

Well, only sort of: GPS is the initialism for a specific system (and QZSS provides corrections for that particular system's satellites, among other things), not a generic term for global navigation satellite systems. Had it said "Japan’s Plan for Centimeter-Resolution GNSS", it would have been different. Europe has EGNOS, which is similar (and was recently granted €1.3 billion for upgrades), the US has WAAS, and India has something similar too [1][2]. [1] http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Satellite_System http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Sa... [2] http://en.wikipedia.org/wiki/GAGAN http://en.wikipedia.org/wiki/GAGAN

swatkat 12y ago
Yes. India has GAGAN (GPS Aided Geo-Augmented Navigation)[1][2] to augment GPS accuracy, similar to EGNOS and WAAS. Apart from this, there's IRNSS (Indian Regional Navigational Satellite System)[3], which is an indigenous satellite navigation system independent of GPS. [1]http://gpsworld.com/gagan-certified-for-aviation-in-india/ http://gpsworld.com/gagan-certified-for-aviation-in-india/ [2]http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jan03_2014 http://www.isro.org/pressrelease/scripts/pressreleasein.aspx... [3]http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Satellite_System http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Sa...
dfc 12y ago
"Well only sort of" what? Yes, "GPS is the initialism for a specific system" and G is the initial for Global. The G in GNSS is also global so I am not sure how that is any different. The article is titled "Japan's Plan for Centimeter-Resolution GPS" and then goes on to describe a system that is anything but global.
- swatkat 12y ago
  GNSS is a generic term for globally available satellite navigation system. GPS is a GNSS implemented and maintained by the USA. Japan is planning to launch thier own satellites as part of QZSS program, to augment this GPS coverage over Japan. GPS receivers in Japan can make use of these "local" sats along with American sats for more accurate positioning.
  - dfc 12y ago
    This system is not globally available.

swatkat 12y ago

Yes. India has GAGAN (GPS Aided Geo-Augmented Navigation)[1][2] to augment GPS accuracy, similar to EGNOS and WAAS. Apart from this, there's IRNSS (Indian Regional Navigational Satellite System)[3], which is an indigenous satellite navigation system independent of GPS. [1]http://gpsworld.com/gagan-certified-for-aviation-in-india/ http://gpsworld.com/gagan-certified-for-aviation-in-india/ [2]http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jan03_2014 http://www.isro.org/pressrelease/scripts/pressreleasein.aspx... [3]http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Satellite_System http://en.wikipedia.org/wiki/Indian_Regional_Navigational_Sa...

dfc 12y ago

"Well only sort of" what? Yes, "GPS is the initialism for a specific system" and G is the initial for Global. The G in GNSS is also global so I am not sure how that is any different. The article is titled "Japan's Plan for Centimeter-Resolution GPS" and then goes on to describe a system that is anything but global.

swatkat 12y ago
GNSS is a generic term for globally available satellite navigation system. GPS is a GNSS implemented and maintained by the USA. Japan is planning to launch thier own satellites as part of QZSS program, to augment this GPS coverage over Japan. GPS receivers in Japan can make use of these "local" sats along with American sats for more accurate positioning.
- dfc 12y ago
  This system is not globally available.