专利汇可以提供Communication system having moving object using satellite专利检索,专利查询,专利分析的服务。并且PURPOSE: To eliminate the need to direct a vehicle antenna to a satellite by comprising a central station which is nearby the center of a coverage area and coupled with a communication network, at least two satellites which have means, and the moving object which has a vertically directed high-gain antenna.
CONSTITUTION: The spherical triangular coverage area Z, the central station SC which is arranged at one point nearby the center of the area on the ground, and two earth synchronous satellites S-A and S-B which have elliptic tracks with the same parameters are used. Each satellite has one or two antennas 11 and 12, which are directed to the central station SC throughout the period of the passage of the satellite through the coverage area, and the central station includes a connection station and a control station. Each moving object M is equipped with an antenna 14, whose axis is directed permanently to the zenith. The need for a means which directs the antenna of the moving object M permanently to the satellite is eliminated.
COPYRIGHT: (C)1989,JPO,下面是Communication system having moving object using satellite专利的具体信息内容。
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