The focus of the Shenzhou-3 flight (SZ-3, Shenzhou means "Magic Vessel" or "Divine Vessel") is to test systems that would ensure the safety of yuhangyuans ("astronauts").

Last Friday the newspaper reported that prelaunch preparation proceeded despite the inclement conditions from the raging sandstorm. Sources told the newspaper then that SZ-3 would be launched "within days" from the Jiuquan Satellite Launch Centre (JSLC) in the northwestern Gansu Province.

In today's report the sources said that after months of intense work, technicians had complete ground testing, electrical inspection, and simulations related to the safety of yuhangyuans. Space officials then finalized the entire flight procedures.

The sources also said that in choosing the launch time, officials took into consideration weather and environmental factors along the course of the launch in the decision.

These sources did not disclose what impact, if any, the two recent sandstorms had at the launch centre.

The latest massive sandstorm, which Chinese officials described as the strongest and longest since 1995, had finally moved eastward towards South Korea, Japan and the western Pacific. In Beijing, the vicious sandstorm reduced daytime visibility to almost nil last week and deposited about 30,000 tonnes of sand here.

Weather forecasters do not foresee any further sandstorms for the coming week. In northern China sandstorms occur more often from March to May, and usually peak in April.

Space officials have only said that SZ-3 will have more systems installed and tested. There will be a dummy yuhangyuan on board the spacecraft as part of the test on the complex and expensive life protection system.

Other tests will include checking the safety of the reentry system as well as conducting experiments on board and sensing the space environment. However, details of the science experiments are not available.

Like the SZ-2 mission, after the Descent Module separates from the Orbital Module for reentry, the Orbital Module will continue operation in orbit for about six months.

On this mission the Changzheng-2F (Long March-2F) rocket will carry another satellite for a piggyback launch. Thus far there is no information on the nature of the satellite.

Officials at JSLC said that there might be another unmanned test mission, SZ-4, later this year. They admitted that the manned space program would try to keep up the pace to attempt the first manned launch next year.

Yearlong Preparation
Preparation for the SZ-3 launch essentially began soon after SZ-2 completed its seven-day mission in January 2001.

Space officials had intended to launch SZ-3 last year. But problems with design changes to the interior installation of the spacecraft caused the lengthy mission delay. This forced the design team to revert back to the previous interior set-up and delayed the mission to this year.

Wen Wei Po reported last Friday that several months ago, large-size cargoes were seen transported by rail from the town of Jiuquan to the launch centre, which is 100 km to the north. These are now believed to be components relating to the SZ-3 launch.

The newspaper also reported that the tracking vessel Yuanwang-4 (YW-4, Yuanwang means "Long View") set sail to its designated location in recent weeks to support the mission. The other three tracking vessels in the fleet were also on course to their respective positions.

In addition to deploying the tracking fleet at sea, China also relies on ground tracking stations within and outside its territory to follow Shenzhou.

Confirmation of the rollout of the CZ-2F launcher with SZ-3 aboard came at the beginning of the month during the Fifth Session of the Ninth National People's Congress (NPC) and the Ninth National Committee of the Chinese People's Political Consultative Conference (CPPCC).

Space officials felt that launch preparation was adequate after more than a year of work and it would be time to launch the mission for the real test.

They said that the SZ-3 mission had incorporated many technical improvements that greatly enhance the spacecraft's reliability. For example technicians have put in much effort to adopt new technologies in ground control and tracking, and safe emergency escape. These changes will be tested thoroughly during the mission.

Third Flight Of CZ-2F
This will be the third flight of the CZ-2F launcher, which is designed and developed at the Chinese Academy of Launch Vehicle Technology (CALT). The launcher is an improved design of the version of CZ-2 with strap-on boosters (CZ-2E), and its reliability is raised to meet the requirements of manned missions.

CZ-2F consists of two core stages, a payload fairing, an escape tower, and four liquid-fuel strap-on boosters.

The domestically built escape tower enables yuhangyuans to bail out of an emergency from 15 minutes before launch to 160 second after liftoff.

The human-rated launcher is the most massive and tallest among all the rockets China has ever built.

CZ-2F has 10 subsystems: launcher structure, control system, power equipment, fault monitoring management system, escape system, remote monitoring system, safety external monitoring system, propellant utilization system, auxiliary system, and ground facilities.

To accommodate satellite deployment, CZ-2F preserves the interface and installation location of the payload attitude orientation system.

Launch vehicle specialists explained that the fault monitoring management and escape systems were added to ensure the safety of yuhangyuans.

Community
Email This Article
Comment On This Article

Related Links
SpaceDaily
Search SpaceDaily
Subscribe To SpaceDaily Express
The Chinese Space Program - News, Policy and Technology
China News from SinoDaily.com

Memory Foam Mattress Review

SPACE MEDIA NETWORK PROMOTIONS Solar Energy Solutions Tempur-Pedic Mattress Comparison ... Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News