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Snapshot


2017 – GPS – Snapshot

The U.S. Air Force (USAF) managed 31 operational GPS satellites during 2017, seven more than the minimum 24 GPS satellites required for effective operations. Even though the U.S. number of . . .

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2017 – GLONASS – Snapshot

Russia’s share of operational PNT satellites increased from 21% in 2016 to 26% in 2017. Operating the Global Navigation Satellite System (GLONASS), the nation was tied with . . .

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2017 – QZSS – Snapshot

After seven years of single-satellite operations for the Quasi-Zenith Satellite System (QZSS), Japan’s PNT constellation, the Japan Aerospace Exploration Agency (JAXA) launched . . .

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2017 – Galileo – Snapshot

Europe’s expansion of its Galileo PNT constellation slowed a little during 2017, when nine clocks aboard some of the satellites failed. Clocks are critical to . . .

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