Data processing: vehicles – navigation – and relative location – Navigation – Space orbits or paths
Patent
1998-06-10
2000-10-03
Zanelli, Michael J.
Data processing: vehicles, navigation, and relative location
Navigation
Space orbits or paths
701 13, 342355, 342356, B64G 110
Patent
active
061285757
ABSTRACT:
Methods are provided for accurate insertion of a constellation of satellites into a common orbit plane with a mean inclination .theta.. In an embodiment of the invention, an initial satellite is inserted on an initial insertion date and, for each of subsequent satellites, a respective orbit insertion date is selected. With reference to the latter date, the initial insertion RAAN is updated to find a current RAAN. This updating is accomplished with knowledge of a regression rate of the initial satellite's orbit normal about a Q vector. With reference to the Q vector's inertial position, an instantaneous inclination that corresponds to the mean inclination .theta. and the updated RAAN is then derived. Finally, the subsequent satellite is injected into an orbit having the instantaneous inclination and the current RAAN.
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Allan, R.R., et al., "The long-period motion of the plane of a distant circular orbit", Proceedings Royal Society, 1964, vol. 280, pp. 97-109.
Croom Christopher Allen
Snyder William Allen
Gibson Eric M.
Gudmestad T.
Hughes Electrnoics Corporation
Sales M. W.
Zanelli Michael J.
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