Coordinatable system of inclined eccentric geosynchronous orbits

Details Coordinatable system of inclined eccentric geosynchronous orbits Coordinatable system of inclined eccentric geosynchronous orbits

1998-07-21

2000-10-03

Poon, Peter M.

Aeronautics and astronautics

Spacecraft

Spacecraft formation, orbit, or interplanetary path

455 121, 455 132, B64G 110

Patent

active

061261165

ABSTRACT:
A coordinatable system of geosynchronous ("24 hour"), inclined, and slightly elliptic satellite orbits, increases available satellite orbital capacity and enables spectrum re-use by forming "highways" of moving "slots" in the space in and about the geostationary orbit (GSO) belt worldwide. Each of a plurality of repeating ground tracks is shared by multiple satellite orbits (and thus "slots"), positioned to achieve specified minimum specified angular separation from other slots using the same frequencies. Ground tracks are located at specified longitudes of symmetry, and orbital parameters are chosen to realize certain which provide the near-maximum total number of slots and which fit neatly within, and replace, some of the existing grid of GSO slots. Incremental modularity permits gradual expansion from current GSO usage, while systematic extension results in large theoretical capacity expansion.

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Chiba, I., et al., "Inclined Geo Satellite Communication System With Deployable Phased Array Antennas" AIAA (1997) pp. 243-249.
"Effects of NGSO Provisional EPFD, APFP Limits on `Quasi-Geostationary` Systems" ITU (Jun. 25, 1998).

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