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"James R. Freeman" wrote in message ...
He is right. Gravity is not constant from one location to the next. For example if we look a W. 105 and move to W. 15 we have moved from a gravity hole to a gravity peak.The core of the Earth is like spinning a egg, in our case the core has not come up to the speed of the surface and locations of higher mass move but give us the 2 valley 2 peak problem in mass/gravity. It is very much to note if You are doing station keeping on a geo-syn sat. . You can also stay at the same location and exoperience varions in the _apparent acceleration_ do teo gravity. I wouldn't call that Gravity not being constant. For Gravity to be inconstant would require that the Gravitational constant vary. -- FF |
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