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Simple Ways to Calculate the Orbits of Space Vehicles

Simple Ways to Calculate the Orbits of Space Vehicles

EACH TIME A MANNED SATELLITE is sent aloft the world waits anxiously to learn if it has gone into orbit. News reports of the event sometimes include pictures of technicians feeding data into computers that forecast the characteristics of the orbit. This tends to create the impression that space navigation is totally beyond the resources of amateurs-that the prediction of orbits is something that can be done only by experts in astrodynamics who have access to electronic computers. There is some truth in this assumption. Still, it is not the whole truth, says Stephen A. Kallis, Jr., an aerospace technologist of Acton, Mass. Kallis maintains that a reasonably satisfactory prediction of where, how fast and how far a space vehicle will go can be made by anyone who can count on his fingers, and he insists that it is a lot of fun to do.

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Simple Ways to Calculate the Orbits of Space Vehicles
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