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Positioning, Navigation, and Timing (PNT) Satellites


Infrastructure: Space Infrastructure

Introduction | Space infrastructure, like its terrestrial counterpart, is an invisible backbone for services used by people all over the world. Like terrestrial infrastructure, space infrastructure is increasingly relied upon…

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2017 – GPS – Snapshot

The U.S. Air Force (USAF) managed ## operational GPS satellites during 2017, ## more than the minimum ## 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 ##% in 2016 to ##% in 2017. Operating the Global Navigation Satellite System (GLONASS), the nation was tied with…

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2017 – QZSS – Snapshot

After ## years of ##-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 ## clocks aboard some of the satellites failed. Clocks are critical to…

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2017 – BeiDou – Snapshot

In 2017, China continued expanding its BeiDou constellation, the nation’s space-based PNT system. Launching ## BeiDou satellites, the nation’s share increased to…

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