Global communication constellation designing method for realizing on-demand coverage of key areas

Abstract

The invention belongs to the technical field of satellite communication, and particularly relates to a global communication constellation designing method for realizing on-demand coverage of key areas. In particular, a constellation comprises a plurality of orbital planes which are uniformly distributed along an equator; only one satellite exists on each orbital plane; an orbital period of each satellite is one integer of a rotation period of the earth; and sub-satellite point tracks of all satellites in the constellation coincide. The constellation can provide a high-elevation communication coverage service for the key areas as required according to a task demand by adjusting design parameters of the constellation such as a regression period, an orbit inclination, an eccentricity ratio, an argument of perigee, an ascending node geographic longitude of a first satellite and a mean anomaly. Area coverage can be realized through the constellation designed by the method; a sub-satellite point track repeating and high-elevation communication service can be provided specific to specific areas of a southern / northern hemisphere by adjusting constellation designing parameters; the number of satellites required by a coverage demand is reduced; the complexity of space and ground systems is lowered; and the systems are more economical.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a design method of a global communication constellation for on-demand coverage of key areas. Background technique [0002] In the past two decades, the satellite communication system has developed rapidly and has attracted extensive attention from all over the world. Among the existing communication systems, the "Iridium" system of the United States can provide wireless mobile communication services for the whole world. Spend. The "GlobalStar" (GlobalStar) system of the United States can provide seamless mobile communication services for areas within 70 degrees south / north latitude. The inclination is 45 degrees. The advantages of systems such as "Iridium" and "Global Star" are that they can cover most of the earth and provide low communication delays, but the high launch and maintenance costs of low-orbit global constellations make them unsuitable ...

AI Technical Summary

Problems solved by technology

Systems such as "Iridium" and "Global Star" have the advantage of covering most of the earth and providing low communication delays, but the high launch and maintenance costs of low-orbit global constellations make them unsuitable for regional coverage In addition, low-orbit satellites move fast and switch between satellites or carriers frequently, resulting in complex system control and high technical risks

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