English 版 (精华区)
发信人: murjun (萧牧), 信区: English
标 题: Orbiting spacecraft works under directions from c
发信站: 哈工大紫丁香 (2003年10月15日19:41:57 星期三), 站内信件
Orbiting spacecraft works under directions from command center
( 2003-10-15 19:03) (xinhua)
Twenty-two minutes after Shenzhou- 5 entered its pre-set orbit Wednesday, it
unfolded its solar panels on the first order from the Beijing Aerospace
Command and Control Center, Xinhua has learned.
The order was radioed to the spacecraft via Yuanwang-2 measuring vessel in
the south Pacific Ocean.
During its 21-hour flight, the spacecraft will receive from the center ten
digitized commands detailing instructions on its maneuvers in the outer
space.
Liu Chengjun, 31, and Hong Chunhui, 26, sitting in the terminal room shielded
with large glasses at the Beijing center, are responsible for the input of
these orders. The flight schedule had been put into the computer system of
Shenzhou-5 before the spacecraft took off, but Liu and Hong have to readjust
it by deleting the old data and putting in new data in response to real- time
changes during the flight, particularly during the first and fifth orbits.
The second and third inputs of the schedule will be done by the measuring and
control stations in Kashi in Xinjiang Uygur Autonomous Region and Weinan in
Shaanxi Province, during the craft 's second round of orbital maneuver. This
is meant to ensure that in case of need, Shenzhou-5 can make an emergency
return during the third and fourth orbits.
Data sent to the space vehicle during the first eight orbits will ensure that
the craft can make an emergency return during each orbit. During the fifth
orbit, the spaceship will adjust itself to a circular orbit from the previous
elliptical one, with data it receives during the third orbit.
The last two data inputs are key to the safety of the home- coming craft.
Commands before and during the return will be given from a measuring and
control station in Namibia, when Shenzhou-5 makes the ninth circle round the
Earth.
The last order, from the Weinan station, will amend the return data to ensure
accuracy of the spacecraft's landing.
All the data are programmed by computer automatically, but Liu and his
colleague have to compare them with the flight schedule carefully, in light
of the specific timing and sequence of the commands.
--
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: 218.8.123.120]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
页面执行时间:3.392毫秒