日本邮政省、科技厅和日本电信电话公司最近决定联合研制新的大型通信卫星,计划于2002年发射技术实验卫星,2005年投入使用。 计划研制的超级静止通信卫星重达3吨多,将搭载一个直径17米、可像雨伞那样开合的大型无线以及大功率电波发射设备。该卫星将把日本全国划分成10多个区域分别覆盖,并加强电波的指向性,只要有重量不到300克的终端机就可以在任何山区地带清晰地接收和传送数 Japan’s Ministry of Posts and Telecommunications, the Department of Science and Technology, and Japan Telecom’s Telephone Company recently decided to jointly develop new large-scale communications satellites and plan to launch experimental satellites in 2002 and put them into use in 2005. The super-static communication satellite planned to be developed will weigh more than 3 tons and will carry a large-scale wireless and high-power radio wave launcher with a diameter of 17 meters that can be opened and closed like an umbrella. The satellite will divide the entire country into more than 10 regions and cover the radio waves, and enhance the directionality of radio waves. As long as there are terminals with a weight of less than 300 grams, it can be clearly received and transmitted in any mountainous region.