Positioning, Navigation, and Timing (PNT) Satellites
US PNT Satellites (GPS)
Infrastructure: Spacecraft Overview – TSRQ1 2019
Infrastructure: Spacecraft Overview - TSRQ1 2019 examines global spacecraft/satellite operations conducted throughout the three space sectors, military, civil government, and commercial. This edition covers communication, PNT, and Earth observation/remote sensing…
2018 – Global Positioning System (GPS)
The U.S. maintained 31 operational GPS satellites during 2018, the same number operational during 2017. While that number of operational satellites is seven more than the minimum number of GPS…
2017 – GPS
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…
Infrastructure: Space Infrastructure – TSR 2018
Infrastructure: Space Infrastructure - TSR 2018 examines global human spaceflight operations to include both the Chinese and US space stations, launch vehicles from all spacefaring nations, communications satellite constellations, PNT…
2016 – GPS
While the U.S. Air Force (USAF) maintained ## operational satellites in its Global Positioning System (GPS) positioning, navigation and timing (PNT) fleet, the U.S. share of overall global operational PNT…
Infrastructure: Space Infrastructure – TSR 2017
Infrastructure: Space Infrastructure - TSR 2017 examines global human spaceflight operations, launch vehicles from all spacefaring nations, communications satellite constellations, PNT satellites, Earth observation and remote sensing satellites, defense satellites,…
2015 – GPS
The U.S. Global Positioning System (GPS) satellite fleet made up ##% of the operational global positioning, navigation, and timing fleets orbiting the Earth in 2015. Originally developed for military use,…
2005 – GPS
The U.S. NAVSTAR (Navigation Signal Timing and Ranging) GPS constellation consists of ## active and ## spare satellites in MEO. According to the DoD, the fundamental concept of GPS is…
2007 – GPS
The U.S. Navigation Signal Timing and Ranging Global Positioning System (NAVSTAR GPS or GPS) continues to be the only fully operational navigation constellation and therefore the most popular. GPS consists…
2014 – GPS
The number of U.S. GPS satellites remained relatively unchanged from 2013, with ## orbiting the Earth. The composition of GPS satellite generations within the constellation changed, as the United States…