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一、Ｊ－Ⅰ火箭概要和发射能力１．概要 Ｊ－Ⅰ火箭的第一级利用Ｈ－２火箭的固体助推器（ＳＲＢ），第二级使用文部省宇宙科学研究所发射科学卫星（ＩＳＡＳ）的Ｍ－３ＳⅡ型火箭，上面级由第三级和整流罩这几部分共同组成的三级式火箭。主要技术参数列于表１。表１ Ｊ－Ⅰ
I. J-I Rocket Summary and Launch Capability Summary The first stage of the J-1 rocket uses the solid propellant (SRB) of the H-2 rocket, the second stage uses the M-3S II rocket that launches the Scientific Satellite (ISAS) of the Ministry of Astronomy and Astronautics, Level and fairing these three parts of the common rocket. The main technical parameters are listed in Table 1. Table 1 J-I