Quote:
Originally Posted by cyth
The question is whether it's even possible to place three small satellites to the Moon's stationary orbit required for a "GPS" system without them getting derailed over time by the Earth's gravitational pull, or even the Sun's or its radiation effects.
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Actually GPS satellites are in medium orbit, not geostationary. The system works by using the speed of light to calculate the distance to the satellites rather than relying on fixed points.