## NASA Technical Translation, Issue 778National Aeronautics and Space Administration, 1976 - Science |

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accuracy activity algorithm angle approximation assume atmosphere atmospheric density axis basic calculate characteristics circular coefficient complex condition considered constant coordinate correction corresponding dependence determined differential digital computer direction Earth eccentricity engine equal equations error estimate examine example expression field Figure flight vehicle formula function given impulse increase independent indices initial integration interval introduce known limit linear load factor magnitude mathematical model matrix mean measurement method motion obtain operator optimal orbital elements orbital plane parameters peric enter period position possible prediction present probability problem quantity radius reduce REFERENCES regime relations relative represent request respect result right sides rotation satellite selection servicing shown solar solution space specified square statistical step stream surface taken tion trajectory unit values variable variations vector zero