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山水
tian ya lun...最佳答案 - 由提问者2007-07-16 07:24:29选出
The position of the Space Shuttle is specified by the Greenwich true of date (GTOD) (geographic) coordinate system. The GTOD system is a rotating, right-handed, Cartesian system with the origin at the center of the Earth. The orientation of this system is specified with:
* The XY plane is the Earth's true of date Equator.
* The Z axis is directed along the Earth's true of date rotational axis and is positive north.
* The positive X axis is directed toward the prime meridian.
* The Y axis completes a right-handed system.
参考资料
http://www-lite.larc.nasa.gov/level1doc/gtod.html
提问者对最佳答案的评价
谢谢,不过,不清楚怎么恰当翻译.
其他回答(1)
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是.
