Method for limiting interference between satellite communications systems
First Claim
1. A method to reduce interference between a GSO satellite and its GSO ground station when operating a plurality of NGSO satellites orbiting at medium earth orbit (MEO) in a constellation, comprising the step of:
- terminating all transmission signals generated on a particular NGSO satellite or emanating from an NGSO ground station in communication with the NGSO satellite when the NGSO satellite is in an exclusion zone defined from 15°
North to 15°
South latitude for a GSO ground station antenna.
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Abstract
Boeing achieves satellite diversity by having a large discrimination angle for a MEO constellation of communications satellites to limit interference in the Ku-band with GSO communications systems. Each satellite entering an exclusion zone over a GSO ground station terminates all transmissions to provide EPFD within acceptable limits. The Boeing MEO constellation preferably comprises 20 satellites, 5 in each orbit. The four orbits are inclined at about 57° with respect to the equator. Services include an Integrated Digital Service (IDS) and Backhaul Data Service (BDS) to accommodate the needs of different users.
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Citations
6 Claims
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1. A method to reduce interference between a GSO satellite and its GSO ground station when operating a plurality of NGSO satellites orbiting at medium earth orbit (MEO) in a constellation, comprising the step of:
terminating all transmission signals generated on a particular NGSO satellite or emanating from an NGSO ground station in communication with the NGSO satellite when the NGSO satellite is in an exclusion zone defined from 15°
North to 15°
South latitude for a GSO ground station antenna.
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2. A satellite communication system for reducing interference comprising:
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a GSO satellite and its GSO ground station, a NGSO satellite and a NGSO ground station in communication with the NGSO satellite, wherein a plurality of NGSO satellites are orbiting in a constellation at Medium Earth Orbit (MEO), an exclusion zone from 15°
North to 15°
South latitude,wherein all transmission signals generated on a particular NGSO satellite or emanating from an NGSO ground station communicating with the NGSO satellite are terminated when the NGSO satellite is in the exclusion zone. - View Dependent Claims (3, 4, 5, 6)
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Specification