| 摘要 |
<p>A method of operation for a satellite system satellite system for Earth observation and communications and a satellite system for Earth observation and communications are disclosed. The system comprises a constellation of two satellites, which together provide continuous coverage of approximately 20° elevation or greater throughout a geographic service area above 60° latitude and a base station for transmitting to, and receiving signals from, the constellation of two satellites. Each satellite has an orbital inclination approximately between 70° and 90° and an orbital eccentricity approximately between 0.275 and 0.45. The satellite base station, comprises communication means for transmitting and receiving signals to and from a constellation of two satellites, which together provide continuous coverage of approximately 20° elevation or greater throughout a geographic service area above approximately 60° latitude; and flight control means for controlling orbits of the constellation of the two satellites. The satellite comprises communication means for transmitting and receiving signals to and from a base station; an Earth observation and communications payload for serving a geographic service area above 60° latitude, with an elevation of approximately 20° or greater; and flight control means for controlling an orbit to have an orbital inclination approximately between 70° and 90° and an orbital eccentricity approximately between 0.275 and 0.45. A launch vehicle comprises a payload fairing; two or more above described satellites positioned within the payload fairing; and propulsion means for launching the two or more satellites into an orbit in the same orbital plane.</p> |
