Какво се меткаш като чекия на песък бе :)

От уикипедията:
"To achieve accuracy requirements, GPS uses principles of general relativity to correct the satellites' atomic clocks."

От http://www.metaresearch.org/cosmology/gps-relativity.asp:
... General Relativity (GR) predicts that clocks in a stronger gravitational field will tick at a slower rate. Special Relativity (SR) predicts that moving clocks will appear to tick slower than non-moving ones. Remarkably, these two effects cancel each other for clocks located at sea level anywhere on Earth....

... Clocks at any altitude above sea level do tick faster than clocks at sea level; and clocks on rocket sleds do tick slower than stationary clocks...

...Special Relativity (SR) predicts that atomic clocks moving at GPS orbital speeds will tick slower by about 7,200 ns/day than stationary ground clocks. Rather than have clocks with such large rate differences, the satellite clocks are reset in rate before launch to compensate for these predicted effects. ...

REALITY CHECKS NEVER BOUNCE!