Optimized land mobile satellite system for North American coverage
First Claim
1. A method for determining orbits for a plurality of satellites in a constellation for providing a satellite service using the plurality of satellites in the constellation, comprising:
- determining an orbit for each one of the plurality of satellites in the constellation, the determining of the orbit comprising;
determining one or more orbit parameters of the orbit for each one of the plurality of satellites, by minimizing a cost function selected from the group of
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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.
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Citations
25 Claims
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1. A method for determining orbits for a plurality of satellites in a constellation for providing a satellite service using the plurality of satellites in the constellation, comprising:
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determining an orbit for each one of the plurality of satellites in the constellation, the determining of the orbit comprising; determining one or more orbit parameters of the orbit for each one of the plurality of satellites, by minimizing a cost function selected from the group of - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for providing satellite services, the method comprising:
placing a plurality of spacecraft in orbits, each of the plurality of spacecraft including a broadcast capability, each of the orbits having a substantially teardrop-shaped or oval-shaped ground track, each of the orbits optimized based upon a cost function selected from the group of - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
Specification