The services web page has much more detail... http://www.qzs.jp/en/services/index.html http://www.qzs.jp/en/services/index.html This system add additional sate

The services web page has much more detail... http://www.qzs.jp/en/services/index.html http://www.qzs.jp/en/services/index.html This system add additional satellites that a normal GPS receiver can receive. By using different orbits they can improve reception. It also transmits on multiple frequencies that allow the effects of the atmosphere on the signal to be better calculated. It will also transmit augmentation information to improve accuracy further.