Only the geosync sat and the Moon have the right GC periods. Please indicate what you think the GPS and LEO orbits to be (or the formula to do the calculation) and I'll make changes. References to other sources indicating that your assertion is a generally held belief would add confidence to the exercise. Has the research on GC aether been finished? Apparently not. The reference is GWW. How hard can it be to compute satellite periods for an immobile Earth?? Not hard at all -- it is the same as for a rotating Earth. The Earth's rotation is not a parameter. I see. The GC system has the same period as the HC system, though one is rotating and the other not. See Aristotle below and GWW. Or was the Earth assumed to be both accelerating and not accelerating? When you made this statement in an earlier post, I assumed it was made unwisely in a fit of pique and I simply passed over it, but now that you have repeated it, it would seem you really believe it is a valid point. I have indicated previously that your comments show a very poor understanding of basic physics (btw -- you still haven't favoured us with any information about your PhD or the subject of your doctoral thesis -- is it something of which you are not proud?) No problemo,senor. CV is in GWW. and comments by Philip M bear me out in this specific matter. In mathematics, probabilities always lie between zero <http://en.wikipedia.org/wiki/0_%28number%29> and one <http://en.wikipedia.org/wiki/1_%28number%29> . An impossible event has a probability of 0, and a certain event has a probability of 1. (However, events of probability zero are not necessarily impossible, and those of probability one are not always certain.) What a contradiction of terms! ( Paul D in vermilion, Philip M’s comments in black) See Aristotle….. again In any event, and I guess your weakness in physics shows up here again, the Earth's acceleration (revolution) does not influence the period of its satellites either. In GS the Earth is immobile, yet it has an acceleration due to revolution? See Aristotle….. again. A contradiction consists of a logical incompatibility between two or more propositions. It occurs when the propositions, taken together, yield two conclusions which form the logical inversions of each other. Aristotle’s law of noncontradiction states that “One cannot say of something that it is and that it is not in the same respect and at the same time.” Robert and non-Robert