Constellation of spacecraft, and broadcasting method using said constellation
AssigneeLockheed Martin Corporation
InventorNeil Evan Goodzeit
Life of this patent
Estimating the term…
Loading patent…
AssigneeLockheed Martin Corporation
InventorNeil Evan Goodzeit
Estimating the term…
In general, a constellation of spacecraft is used to broadcast to a particular region with high angles of view in order to reduce blockage or shadowing. A constellation of a plurality of spacecraft is placed in 24-hour orbits having inclination of about 55°, eccentricity of about 0.32, semi-major axis of about 42,000 km, longitude of the ascending node of about 43° East, argument of perigee of about 270°, and longitude of the ground track at maximum latitude of about 7° East. The preferred number of spacecraft ranges from three to six. In a particular application of Digital Audio Broadcast to Europe in some embodiments, the most populous cities are provided with service from no more than about 10° from vertical, and broadcast takes place when the spacecraft are above at least 35° North latitude. The broadcast power is reduced during those portions of the orbit in which the ground track lies in the Southern hemisphere.
A constellation, comprising:
A constellation, comprising:
A constellation, comprising:
A method for broadcasting to European cities, said method comprising the steps of:
Dependencies are inferred from the claim text.