Hellow

On most webpages I find that the speed of the GPS satellites is about 11000 km/h (some also say 12000 km/h)

But if I calculate the speed that a satellite must have in order to stay in it's orbit at a height of 20240 km, I find 13938 km/h as the result

Here is the calculation

v= sqrt(G* mA/(rA+h)

where v = velocity (speed

G = 6.67*10^-11 (N*m²)/kg

mA= the earth's mass = 59.8*10^23 k

rA= the earth's radius = 6.37*10^6

after filling in these numbers

v = sqrt(3.99*10^14/(6.37*10^6+20,240*10^6)

v = 3871.61 m/

v = 13938 km/

why is the result so much off from the data on the websites? Am I doing something wrong

Thanks a lot!

--

TiTaN_pi8

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