Aeronautics and astronautics – Spacecraft – Spacecraft formation – orbit – or interplanetary path
Reexamination Certificate
2011-05-24
2011-05-24
Lee, Benjamin P (Department: 3641)
Aeronautics and astronautics
Spacecraft
Spacecraft formation, orbit, or interplanetary path
C244S158600, C701S226000
Reexamination Certificate
active
07946533
ABSTRACT:
A constellation, including a plurality of spacecraft, including a first, second and third spacecraft, each of the plurality of spacecraft including a broadcast capability, and each of the plurality of spacecraft in its own approximately 24-hour orbit. Each of the orbits has a substantially teardrop-shaped or oval-shaped ground track, is optimized based upon elevation angle or probability of signal availability, and has an apogee longitude of approximately 90° west to approximately 100° west. Each of the orbits has a semi-major axis of approximately 42,164 kilometers, an argument of perigee of approximately 270° , an inclination of approximately 40° to approximately 60° , and an eccentricity of approximately 0.16 to approximately 0.4. The orbits of each of the plurality of spacecraft are selected to bring each of the spacecraft to apogee at time increments of approximately eight hours.
REFERENCES:
patent: 6017003 (2000-01-01), Mullins
patent: 6223019 (2001-04-01), Briskman et al.
patent: 6283415 (2001-09-01), Rosen
patent: 6318676 (2001-11-01), Turner et al.
patent: 6325332 (2001-12-01), Cellier et al.
patent: 6564053 (2003-05-01), Briskman et al.
patent: 6616104 (2003-09-01), Cheng et al.
patent: 6695259 (2004-02-01), Maeda
patent: 6851651 (2005-02-01), Goodzeit
patent: 7277673 (2007-10-01), Castiel
patent: 7357356 (2008-04-01), Goodzeit et al.
patent: 7369809 (2008-05-01), Wang
patent: 2002/0136191 (2002-09-01), Draim et al.
patent: 2003/0034422 (2003-02-01), Higgins
patent: 2003/0155468 (2003-08-01), Goodzeit
patent: 2003/0189136 (2003-10-01), Maeda et al.
patent: 2003/0228867 (2003-12-01), Castiel
patent: 2005/0098686 (2005-05-01), Goodzeit
patent: 2007/0032191 (2007-02-01), Marko
patent: 1 116 657 (2001-07-01), None
patent: WO 03/061141 (2003-07-01), None
Yoshio Karasawa, et al., “Analysis Of Availability Improvement in LMSS By Means Of Satellite Diversity Based On Three-State Propagation Channel Model”, IEEE Transactions On Vehicular Technology, vol. 46, No. 4, Nov. 1997.
“S-Dars Broadcast From Inclined, Elliptical Orbits”, by Robert D. Briskman, et al., 52nd International Astronautical Congress, Oct. 1-5, 2001, Toulouse, France.
Lee Benjamin P
Lockheed Martin Corporation
McDermott Will & Emery LLP
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