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日本的实验用中型广播卫星(BS)于1978年4月8日发射,4月26日进入东经110°的赤道同步卫星轨道,在经过约三个月的测定、检查,肯定星载设备工作正常后,从7月20日起开
Japan’s experimental medium-sized broadcasting satellite (BS) was launched on April 8, 1978 and entered the equatorial geostationary satellite orbit at 110 ° east on April 26. After about three months of measurement, it was checked that the spaceborne equipment was working properly After starting from July 20