送交者: steven 于 2005-6-29, 04:49:10:
回答: 好象没有说错 由 Yush 于 2005-6-29, 04:11:35:
In fact, transfering from elliptical orbit to circular orbit throught hohmann transfer is the easiest thing, since it uses less fuel. As for KH-12, things we know about KH-12 is extremely little, but it is widely believed KH-12 improvement over 11 which is capable for digital imaging, is the capability of signal intellegence and sensitivity over broader light specturms including infrared.