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发信人: murjun (萧牧), 信区: Aero
标 题: 嫦娥登月工程的四个目标(EN)
发信站: 哈工大紫丁香 (2003年11月09日11:35:46 星期天), 站内信件
Four goals for China's moon project
( 2003-11-08 16:46) (Xinhuanet.com)
Chang'e I, China's moon probing project is proceeding in full swing in a well-
organized way. China's first moon probing is planned to be launched in three y
ears. Four scientific goals have been set for the first stage of the program,
Chang'e I moon orbiting project.
This was disclosed recently by Ou'yang Ziyuan, academician of Chinese Academy
of Sciences and China's chief scientist on moon probing. He also detailed the
project as follows.
Verifications have been conducted on China's moon probing program for years. T
here were additional verifications on the technical scheme in recent two years
. Now everything is going on as scheduled.
The first stage of the program, Chang'e I as it is called, will mostly adopt e
xisting mature technologies and there is nothing insurmountable or fundamental
problems technically. However, it takes time to develop all equipment to be i
nstalled inside the satellite and to establish systems for orbiting, carrying,
monitoring, and ground receiving, as the project aims at the lift-off of a mo
on probing satellite and making it orbit the moon. It is scheduled that three
years is needed before the maiden visit to the moon can be made.
According to the short-term planning, there are three stages for China's moon
probing, that is, orbiting, docking, and returning. In the first stage, orbiti
ng, China's first moon exploration satellite will be developed and launched wh
ich will conduct a comprehensive, overall, and panoramic observation to captur
e three-dimensioned graphs of the moon. Researches for the second stage, docki
ng, include the launch of a docking vehicle for lunar soft landing, soft landi
ng test, inspection around the lunar surface by a lunar rover, on-spot explora
tions, and moon-based astronomical observations. For the third stage, returnin
g, in addition to a docking vehicle, a small-sized sampling capsule will be la
unched which will collect key samples from the moon and return to the earth. "
Orbiting" is presently central to China?ˉs moon probing program.
There are four scientific goals for this stage of "orbiting".
For the first goal, there will be three-dimensioned graphs of the lunar surfac
e. Basic structures and physiognomy units of the lunar surface will be defined
precisely. Researches on the shape, size, distribution, and density will be m
ade on the crates on the moon. These researches on the crates will produce dat
a for identifying the age of the surface and early history of terrestrial plan
ets and provide information needed to select the sites selecting for soft land
ing on the moon surface and for the lunar base.
The second goal is concentrating on the distribution and types of elements. It
will be focused on the content and distribution of 14 elements such as titani
um and iron which can be exploited. A map of elements distribution around the
moon will be sketched. Graphs for lunar rocks, mineral materials and geology w
ill also be drawn respectively. The area rich in specific elements will be ide
ntified. And prospects of the development and exploitation of the mineral reso
urces will be evaluated.
The third goal is to detect the depth of the lunar soil through microwave radi
ation. In this way we can calculate the age of the lunar surface and distribut
ion of the lunar soil on the lunar surface. This lays a foundation for the fur
ther estimates of the content, distribution, and quantity of helium-3 which is
power generating fuel caused by nuclear fusion.
The fourth goal is focused on the space environment between the earth and the
moon. The average distance between the earth and the moon is 380,000 thousand
km, which is in the earth's far magnetotail. Here the satellite probes solar e
nergetic particles, plasma in solar wind, and the interaction between the sola
r wind and the moon and between the tail of the magnetic field of the earth an
d the moon.
--
我非常喜欢在有风有雨的季节计划自己;
有风有雨后的季节晒着阳光我昏昏睡去;
睡去的我依然在甜梦中将曾有过的温习;
温习昨天前天等等的种种激情与过去。
Jim Mural
※ 来源:·哈工大紫丁香 bbs.hit.edu.cn·[FROM: 218.8.122.57]
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