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据日刊《放送技术》1986年4月号报导,日本于1986年2月12日下午4时55分(东京时间)从鹿儿岛县种子岛宇宙中心大崎发射场用N-Ⅱ火箭发射了实用广播卫星的轨道备份星BS-2b。 BS-2b是日本的第三颗广播卫星,原计划在1985年8月15日发射,但因BS-2a转发器和单脉冲射频敏感器出故障以及太阳电池供电能力下降,特别是转发器故障,不得不推迟发射。宇宙开发事业团做了大量的分析、研究,查出了故障原因,决定在行波管电子枪外侧加易于散热的铜罩,在单脉冲射频敏感器上加屏
According to the Journal of Radio and Television Technology, April 1986, it was reported that Japan launched its N-II rocket from Osakazu Cosmos Center Osaki Center in Kagoshima Prefecture at 4:55 pm (Tokyo time) on February 12, 1986 Broadcast satellite orbit backup star BS-2b. BS-2b, Japan’s third broadcasting satellite, was originally planned to be launched on August 15, 1985 but due to the failure of the BS-2a transponder and the single-pulse radio frequency sensor and the decrease of the solar cell power supply capability, especially the transponder failure , Had to postpone the launch. Cosmic Development Group did a lot of analysis, research, found the cause of the malfunction, decided to outside the traveling wave tube gun with easy to heat copper cover, in the single pulse RF sensor plus screen