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根据与法国国家航天中心（ＣＮＥＳ）签订的合同，Ａｅｒｏｓｐａｌｉａｌｅ公司已经研究出一种称为Ｔａｏｓ的卫星系统，它具有移动跟踪和寻呼双重使命。由５颗Ｔａｏｓ卫星组成的星座定位精度为１ｋｍ，短消息传送的最大时延为２小时，Ｔａｏｓ卫星重１５２ｋｇ，功率为２７０Ｗ。
Under a contract with the French National Space Center (CNES), Aerospaliale has developed a satellite system called Taos that has the dual mission of mobile tracking and paging. The constellation of 5 Taos satellites has a positioning accuracy of 1km, the maximum delay of short message transmission is 2 hours, and the Taos satellites weigh 152kg and the power is 270W.