Browse Resources by Year

2018 – Galileo Ground Networks – Snapshot

Responsibility for the operation of the Galileo constellation’s ground system moved in 2018 from the European Space Agency (ESA)…

2018 – GPS Ground Networks – Snapshot

In 2018, the USAF continued GPS operations with ground equipment that is decades…

2018 – Quasi-Zenith Satellite System (QZSS) – Snapshot

Japan’s Cabinet Office continues to operate all four satellites of QZSS (also known as Michibiki), the country’s PNT constellation. QZSS is a regional PNT system solely catering to . . .

2018 – Navigation with Indian Constellation (NavIC) – Snapshot

India launched one Indian Regional Navigation Satellite System (IRNSS) satellite to complete its Navigation with Indian Constellation…

2018 – Global Positioning System (GPS) – Snapshot

The U.S. maintained 31 operational GPS satellites during 2018, the same number operational during 2017. While that number of operational satellites is . . .

2018 – Global Navigation Satellites System (GLONASS) – Snapshot

For 2018, Russia maintained its 2017 number of operational GLONASS PNT satellites, 24; these satellites are also . . .

2018 – Galileo – Snapshot

In contrast to the PNT systems operated by other nations (except Japan), two European civil government organizations (the EU) and the ESA) share acquisition, management…

2018 – BeiDou/CentiSpace – Snapshot

Of all the nations deploying and operating PNT satellites in 2018, China…

2018 – PNT Satellites Breakdown – Snapshot

Of the 146 PNT satellites in Earth orbit during 2018, 101 were operational, up 11% from 2017’s total of 91 operational PNT satellites. The U.S. maintained the highest share of…

2018 – PNT Satellites Mission Segment Breakdown – Snapshot

Like PNT deployments in previous years, the majority of the 27 PNT satellites deployed in 2018, 81% (21) were for military missions. Four satellites (15% of the total) were deployed for . . .