navigation satellites
Space-based positioning system
Navigation satellites are spacecraft orbiting Earth that transmit signals enabling receivers on the ground to determine their precise location.
The best-known system is GPS (Global Positioning System), though several nations operate their own constellations.
These satellites make possible everything from turn-by-turn driving directions to precision agriculture to military targeting: My phone uses navigation satellites to track my run.
- atomic clocksDevices measuring time via particle vibrations
- search and rescueFinding and saving people
- GPSSatellite-based location technology
- geodesyEarth measurement science
- GalileoRenaissance astronomer from Italy
orbital mechanics · triangulation · antennas · ground control · signal processors · transponders · Doppler effect · precision timing · signal encryption · autonomous vehicles · disaster management · onboard computers · military operations · Sputnik 1 · solar panels · Iridium · ephemeris · propulsion systems
- satellitesmicrosatellites, nanosatellites, SES, Terra, Aqua
- Space Programsrocket launch, launch vehicles, space station, lunar mission, space research
navigation satellitesdead reckoning
Position-tracking via estimated motion
celestial navigation · traditional navigation · pilotage · compass navigation · astrolabe
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