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Japan considers expansion of QZSS system as GPS backup

Article by: Darren Griffin
Date: 19 May 2017

Japan's domestic navigation system, the Quasi-Zenith Satellite System (QZSS), was designed as GPS augmentation system allowing for centimetre level accuracy when supplementing existing GPS data.

The network was designed to have four satellites in orbit, one is already aloft and three more are scheduled for launch this year ahead of the system going live in 2018.

But now Japan is considering adding three more satellites to permit the QZSS system to operate as an independent regional GPS service for Japan and provide a back-up reducing their reliance on GPS.

Source: QZSS - Cabinet Office (Japan)

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