gps satellite orbit – gps satellite height above earth

A world map of the positions of satellites above the Earth’s surface, and a planetarium view showing where they appear in the night sky,

A satellite at this height takes 12 hours to complete an orbit As the satellite moves the Earth rotates underneath it In 24-hours the satellite crosses over the same two spots on the equator every day This orbit is consistent and highly predictable It is the orbit used by the Global Positioning System GPS satellites,

GPS Satellite Orbits

Live World Map of Satellite Positions

How Fast Do GPS Satellites Travel?

List of GPS satellites

 · Relative to the Earth, GPS satellites orbit twice in a sidereal day, the length of time the stars instead of the sun take to return to the original position in the sky, Since a sidereal day is about 4 minutes shorter than a solar day, a GPS satellite orbits once every 11 hours and 58 minutes,

Real-time GPS satellite orbit and clock estimation based

 · The GPS wikipedia page mentions that with this orbit the satellites have an orbital period of about 12 hours and thus follow the same track over the earth – this was useful for debugging when the system was first being set up But surely a similar effect could have been achieved with an 8 or 6 hour orbital period or some other divisor of 24 for much less expense,

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Satellite maneuvers are not precise by GPS standards—so to change a satellite’s orbit, the satellite must be marked unhealthy, so receivers don’t use it, After the satellite maneuver, engineers track the new orbit from the ground, upload the new ephemeris, and mark the satellite healthy again, The operation control segment OCS currently serves as the control segment of record, It provides

GPS Satellite Constellation, The satellites in the GPS nominal constellation are arranged into in six equally-spaced orbital planes with an inclination of 55 degrees in relation to the equator, Each plane contains four “slots” occupied by baseline satellites, This 24-slot arrangement ensures users can view at least four satellites from virtually any point of the planet,

Lockheed Martin to upgrade GPS satellites for in-orbit

 · Real-time precise GNSS Global Navigation Satellite System satellite orbit and clock are the prerequisite of many real-time GNSS-based applications such as real-time POD Precise Orbit Determination of LEO Low Earth Orbiter satellites Hauschild et al 2016 real-time atmosphere sensing Ding et al, 2017 Liu et al,, 2018 and real-time PPP Precise Point Positioning Zumberge et al,, 1997,

Catalog of Earth Satellite Orbits

GPS Satellite Orbits, Orbits of the GPS-Satellites distances are to scale The satellites orbit the earth with a speed of 3,9 km per second and have a circulation time of 12 h sidereal …

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GPSgov: Space Segment

 · WASHINGTON — Lockheed Martin is redesigning the bus used for Global Positioning System satellites so they can be upgraded with new hardware on orbit a company executive said Feb 25 Eric Brown

gps satellite orbit

Global Positioning System

 · GPS satellites fly in medium Earth orbit MEO at an altitude of approximately 20,200 km 12,550 miles Each satellite circles the Earth twice a day Each satellite circles the Earth twice a day Enlarge

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Catalog of Earth Satellite Orbits

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Satellite Map

Welcome to Satellite Map, This application maps the current location of about 19,300 manmade objects orbiting the Earth, Use the Preset dropdown menu to conveniently select a subset of satellites, for example, Russian or low earth orbit satellites, Selected satellites are colored red,

Why are the GPS constellation satellites in such a high orbit?

GPS Space Segment

106 lignes · Samples of three GPS satellites’ orbits over a five-year period 2013 to 2018 USA-242, USA-239, USA-151, Earth As of 17 June 2021 [update] , 77 Global Positioning System navigation satellites have been launched: 30 of which are operational, 3 in reserve, 1 being tested, 41 …