A Hybrid Orbit Igso Constellation with Regional Coverage and Global Consideration

Abstract

The invention discloses a mixed-orbit IGSO constellation with regional coverage and global consideration, which includes at least 5 IGSO satellites in geosynchronous orbits, the at least 5 IGSO satellites are divided into two groups, and each group includes at least 3 IGSO satellites, One IGSO satellite is shared between the two groups; at least three IGSO satellites in the first group share one orbital plane, the right ascension of the ascending node is the same, the difference between the mean and anomalies is 120°, and they have the same orbital inclination, the three IGSO satellites They are connected by fixed inter-satellite link communication; at least 3 IGSO satellites in the second group have the same sub-satellite point crossing the equator longitude, and the mean anomaly angles differ by 120°, among which at least two IGSO satellites that are not shared with the first group The satellites have the same orbital inclination and ground track, and the second group of 3 IGSO satellites does not establish an inter-satellite link, and adjusts the orbital inclination to make it always visible to the location-restricted gateway. The mixed-orbit IGSO constellation of the present invention can only rely on location-limited gateway stations to achieve multiple coverages of target areas while taking into account global coverage.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, in particular to a mixed-orbit IGSO constellation with regional coverage and global consideration. Background technique [0002] In recent years, the research and development and test activities of broadband multimedia satellite communication systems abroad have continued. Typical systems such as Amerhis, Spaceway3, WINDS, WGS, etc., these satellite broadband communication systems are composed of one or more geostationary orbit (Geostationary Orbit , GEO) satellite composition. GEO satellites work on the equatorial ring at an altitude of 35,786km from the ground, remain stationary relative to the ground, and have a large coverage area. Quasi-global coverage can be achieved by using 3 to 5 GEO satellites (the north and south poles cannot be covered), and the technology is relatively mature. Easy to maintain, but there are some problems: [0003] 1) The average coverage elevation ...

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Problems solved by technology

[0004] 2) It cannot cover the whole world, and there are communication blind spots near the poles;

[0006] 4) The position of the satellite is fixed, which is vulnerable to interference and attack;

[0007] 5) Orbital resources are crowded, and it is difficult to coordinate orbital positions and frequency resources

[0010] To sum up, due to the large Doppler frequency shift and time delay changes in low-orbit satellite communication, it is difficult to be used for broadband multimedia communication, and the existing GEO broadband multimedia constellation has communication blind spots in the north and south poles, and the average The coverage elevation angle is low and the fading margin is large, but the coverage performance of a single IGSO satellite for a specific area is not as good as that of a GEO satellite

[0011] Therefore, the problem in the existing technology is: how to achieve multiple coverage of the target area by only relying on the location-limited gateway station, while taking into account the global coverage

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