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日本将于2003年2月用H-2A火箭首次发射情报卫星。情报卫星除了军事侦察之外,也可用于灾害防治。 据报导,日本将于年2月和7月发射4枚分辨率为1m的“光学卫星”以及可以在晚间和恶劣天气下使用的合成孔径雷达卫星。卫星收到的图像经由高速通讯系统传到地面的4个情报接收站。 日本一直依赖美国卫星提供情报,因此对其即将发射的情报卫星期望很高。不过美国的预警卫星可以在赤道上空约35000 km的静止轨道上,用红外线来探知导弹的热源,但是日本的情报卫星不具备这种能力;
Japan will launch its first intelligence satellite with the H-2A rocket in February 2003. Intelligence satellite in addition to military reconnaissance, but also can be used for disaster prevention and control. It is reported that Japan will launch four “optical satellites” at 1m resolution in February and July of each year and synthetic aperture radar satellites that can be used at night and in bad weather. The images received by the satellites reached the four intelligence receiving stations on the ground via a high-speed communications system. Japan has always relied on U.S. satellites to provide intelligence and therefore has high hopes for its upcoming intelligence satellite. However, early warning satellites in the United States can detect the heat source of missiles using infrared rays on a stationary orbit about 35,000 km above the equator, but Japan’s intelligence satellites do not have this capability;