Shenzhou 6

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Shenzhou 6
Shenzhou spacecapsule drawing.png
Diagram of the Shenzhou capsule-stack, without deployed orbit module solar cells
Operator Flag of the People's Republic of China.svg CMSA
COSPAR ID 2005-040A
SATCAT no. 28879
Mission duration4 days, 19 hours, 33 minutes
Orbits completed76 [1]
Spacecraft properties
Spacecraft type Shenzhou
Crew
Crew size2
Members Flag of the People's Republic of China.svg Fèi Jùnlóng
Flag of the People's Republic of China.svg Niè Hǎishèng
Start of mission
Launch dateOctober 12, 2005, 01:00:05.583 (2005-10-12UTC01:00:05Z) UTC
Rocket Chang Zheng 2F
Launch site Jiuquan LA-4/SLS-1
End of mission
Landing dateOctober 16, 2005, 20:33 (2005-10-16UTC20:34Z) UTC
Landing siteAmugulang pasture, Hongger Township
Siziwang Banner, Inner Mongolia [ vague ]
Orbital parameters
Reference system Geocentric
Regime Low Earth
Shenzhou missions
 

Shenzhou 6 (Chinese :神舟六号; pinyin :Shénzhōu lìuhào) was the second human spaceflight of the Chinese space program, launched on October 12, 2005 on a Long March 2F rocket from the Jiuquan Satellite Launch Center. The Shenzhou spacecraft carried a crew of Fèi Jùnlóng (费俊龙) and Niè Hǎishèng (聂海胜) for five days in low Earth orbit. It launched three days before the second anniversary of China's first human spaceflight, Shenzhou 5.

Contents

The crew were able to change out of their new lighter space suits, conduct scientific experiments, and enter the orbital module for the first time, giving them access to toilet facilities. The exact activities of the crew were kept secret but were thought by some to include military reconnaissance, however this is likely untrue given that similar experiments in the US and USSR determined that humans in space are not suited for military reconnaissance. [2] It landed in the Siziwang Banner of Inner Mongolia on October 16, 2005, the same site as the previous crewed and uncrewed Shenzhou flights.

Crew

Position Crew Member
Commander
(指挥长)
Fei Junlong
Only spaceflight
Flight Engineer
(操作手)
Nie Haisheng
First spaceflight

Backup Team 1

Position Crew Member
Commander
(指挥长)
Liu Boming
Flight Engineer
(操作手)
Jing Haipeng

Back-up Team 2

Position Crew Member
Commander
(指挥长)
Zhai Zhigang
Flight Engineer
(操作手)
Wu Jie

Crew notes

This is the first spaceflight for both crew members. The crew was introduced to the Chinese public and international media about five hours before the launch. Niè Hǎishèng celebrated his 41st birthday in space.

Huang Chunping, the chief designer of the Long March 2F rocket, was quoted in the Beijing Times as saying the crew members who would fly the mission were selected from a pool of three pairs. Five pairs of astronauts trained for the flight and about one month before launch the two pairs with the lowest performance were dropped. [3] The Ta Kung Pao newspaper had reported that Zhai Zhigang and Nie Haisheng were the leading pair, after having been in the final group of three for Shenzhou 5.

Mission highlights

Launch

The crew arrived at the spacecraft about 2 hours and 45 minutes before the launch and the hatch closed 30 minutes after their arrival. At 01:00:05.583 UTC on October 12 Shenzhou 6 lifted off from the launch pad at Jiuquan Satellite Launch Center. The launch phase was reported to be normal with the escape rocket separating 120 seconds after launch when the rocket was travelling 1,300 m/s (4300 ft/s). Sixteen seconds later the four booster rockets separated at an altitude of 52 km (32 mi). The payload fairing and first stage detached 200 seconds after launch. The second stage burned for a further 383 seconds and the spacecraft separated from the rocket 200 km (120 mi) above the Yellow Sea. The spacecraft then used its own propulsion system to place it into a 211 km by 345 km (131 by 214 statute miles) orbit, with an inclination of 42.4 degrees, about 21 minutes after launch. [4] At 01:39 UTC Chen Bingde, the Chief Commander of the Chinese space program, announced the launch was successful. The crew ate their first meal in space at 03:11 UTC.

Before the flight, the launch time had been the object of speculation by the Chinese media. For several months before the planned launch its time was only given as mid-October, or even late-September. Then on September 23 it was reported by the Hong Kong-based news agency China News Service that the launch was tentatively scheduled for 03:00 UTC on October 13. This launch time was confirmed two weeks later by Jiang Jingshan, a member of the Chinese Academy of Engineering. But then on October 10 an official from the technical department of the Jiuquan Satellite Launch Center said the launch was then scheduled for 01:00 UTC on October 12. This new launch time could have been designed to dodge the cold weather which had been forecast to hit the area. [5] Assembly of the rocket was reported complete on September 26. [6] On October 4, the Shenzhou 6 spacecraft was attached to the CZ-2F rocket, also known as Shenjian. [7]

Unlike the uncrewed Shenzhou flights, Shenzhou 5 and 6 were launched during daylight hours to provide greater safety in case of abort. The launch was televised live with China Central Television selling advertising for RMB¥2.56 million (US$316,000) for five seconds, to RMB¥8.56 million (US$1 million) for 30 seconds. [8] A video camera had been added to the rocket and images of it were broadcast during the ascent and the separation of the Shenzhou spacecraft.

Shortly after launch, recovery crews began searching a region from the Badain Jaran Desert in Inner Mongolia to Shaanxi for the launch escape tower, booster rockets, first stage and payload fairing. Of particular interest was the "black box" of the rocket, which contained telemetry that may not have been downlinked during the launch phase. It was found 45 minutes after launch somewhere near Otog Banner. It was first sighted by a herdswoman, Lian Hua, about 1.5 km from her home. Other wreckage from the launch was found and destroyed at its impact location or brought back to Jiuquan. [9]

General Secretary and President Hu Jintao was present at the Beijing Aerospace Control Center to watch the launch. Premier Wen Jiabao was present at the Jiuquan Satellite Launch Center.

Five days in orbit

The first of several orbit changing maneuvers happened as planned at 07:54:45, with a 63-second burn to circularize the orbit. Based on United States Space Command orbital elements, it was in a 332 by 336 km (206 by 209 statute miles) orbit. After about an hour and a half, the hatch between the re-entry and orbital modules was opened and, for the first time, crew were able to enter the second living compartment of the Shenzhou spacecraft. Fèi Jùnlóng was the first to enter, while Niè Hǎishèng remained in the reentry module. They would swap positions about three hours later.

At 13:32 UTC, Niè and Fèi had a seven-minute conversation with their wives and children who were in Mission Control. [10] Niè's daughter sang "Happy Birthday to You", as his birthday is October 13.

The activities of the crew were not fully revealed by the Chinese. Only vague references to experiments were made, though some were made public. One experiment involved the crew testing the reaction of the spacecraft to movement within the orbital and reentry modules. They moved between the modules, opening and closing the hatches and operating equipment with "more strength" than normally required. [11]

A second orbital maneuver occurred at 21:56 on October 13. It raised the orbit that had been lowered due to atmospheric drag, and lasted 6.5 seconds.

On October 15, Niè and Fèi had a two-minute conversation with General Secretary and President Hu Jintao, beginning at 08:29. During the conversation, Hu told them "The motherland and people are proud of you. I hope you will successfully complete your task by carrying out the mission calmly and carefully and have a triumphant return". [12]

Re-entry and landing

Nie Haisheng exits the re-entry capsule of Shenzhou 6 at the main landing field in Central Inner Mongolia Autonomous Region. Nie Haisheng gets out of reentry.jpg
Nie Haisheng exits the re-entry capsule of Shenzhou 6 at the main landing field in Central Inner Mongolia Autonomous Region.

The re-entry process began at 19:44 on October 16 when the orbital module separated as planned from the rest of the spacecraft. Unlike with the Soyuz spacecraft, this is done before the re-entry burn, allowing the orbital module to stay in orbit for extended months-long missions or to act as a docking target for later flights. The orbital module fired its engines twice on October 19 to give it a circular orbit with a height of 355 km (221 mi). [13]

One minute after this separation, the engines on the service module ignited over the coast of West Africa to slow the spacecraft. At 20:07, the re-entry module separated and five minutes later the re-entry proper began, as the Shenzhou capsule entered the top of the atmosphere, over China. The communications blackout that occurs during re-entry started at 20:16 and two minutes later radio communication was regained with the spacecraft. The main parachute opened and the capsule began to slowly descend to a landing on the Inner Mongolia northern grasslands at 4:33 a.m. local time (20:33 UTC). [14] The capsule landed approximately 1 km (about 1000 yards) from its planned target. [15]

About half an hour after landing, the recovery forces had the hatch of the spacecraft open and first Fèi, and then Niè emerged. Hou Ying, chief designer of the landing site system, said the recovery was improved over that of Shenzhou 5. [16] After medical check-ups and a light meal the astronauts were put on a special plane bound for Beijing, where they were placed into medical isolation for the following two weeks. [17] At 21:46, Chen Bingde had declared the entire mission to be a success.

The capsule was returned to Beijing by train and handed over to China Research Institute of Space Technology at Changping railway station. [18]

The orbital module continued to orbit the Earth, gathering more information from experiments on board. The module also gave Chinese mission controllers experience at long-duration spaceflights. After 2,920 orbits of the Earth, its active mission ended on April 15, 2006. It is still in orbit, and will reenter when its orbit sufficiently decays. [19]

There were two planned landing sites for the mission. The primary site was the banner of Siziwang in Inner Mongolia. The secondary site was at the Jiuquan launch site. In addition, there were recovery forces at Yinchuan, Yulin and Handan. It is also possible for the Shenzhou spacecraft to splashdown in the ocean should the need arise, with further recovery crews in the Yellow Sea, the East China Sea and the Pacific Ocean. [20]

Some Chinese diplomats are trained and equipped for any emergency landing at sites that are not on Chinese territory. Zhang Shuting, chief designer of the emergency and rescue system, has said that emergency landing sites have been identified in Australia, Southwest Asia, North Africa, Western Europe, the United States and South America. [21] The diplomatic mission nearest to the landing site will be given the task to head any rescue mission if necessary. The Chinese government had advised Australia that emergency landing sites have been identified in New South Wales, Queensland, the Northern Territory and Western Australia. Emergency Management Australia, the Australian government agency that co-ordinates the response to major contingencies, has said they are ready to deal with any emergencies that arise during spaceflights. [22] However, the return module is designed to allow access from the outside only to those with a special key. A copy of this key has not been made available to Australian officials, but it was reported that an unnamed Chinese military attaché at the Chinese embassy in Canberra had one. [23]

Project management

As with previous Shenzhou series, Chinese military is heavily involved, and in official Chinese documents, project managers are referred as project commanders instead:

Upgrades

The Chinese space officials have said that the Long March 2F rocket featured a "fire security system" on the escape tower. Speculation on what this means ranges from better fail-safes to stop accidental firings, to the addition of a fire extinguisher. The Wen Wei Po newspaper have reported that the rocket appeared the same as that used for Shenzhou 5 except that a "transition segment" was visible at the top of the Shenzhou 6 stack, attached to one end of the orbital module.

China Aerospace Science and Technology, the major manufacturer of both the Shenzhou spacecraft and the Long March rocket have said that although the flight featured a second astronaut and was much longer than Shenzhou 5, the rocket and spacecraft did not weigh much more due to optimisation of its systems. [24] Only 200 kg (about 440 lb) more was needed for the second astronaut. [25] Among the amenities on board for the crew was hot food, sleeping bags and essential sanitary equipment. The sleeping bag was hooked to a wall of the orbital module and the crew had alternating sleep periods. [26] The shock absorbers in the crew seats were redesigned so as to provide more safety to the crew in case the braking rockets fail to fire just before touchdown. The flight telemetry recorder on the spacecraft had its memory increased to about 1 gigabyte, and the read/write speed was now 10 times as fast as the computers carried on previous flights. [27] It was also about half the size of that carried on Shenzhou 5. Overall, 95% of the Shenzhou 6 space capsule is indigenously designed/produced in China, the highest rate in comparison to the previous ones.

The menu included pineapple-filled mooncakes, green vegetables, braised bamboo shoots, rice, and bean congee. In total there was 40 kg (about 88 lb) of food on board. [28] A somewhat strange aspect of the mission reported in the Chinese press was the fixation on the purity of drinking water for the astronauts, where it was claimed that their water reportedly comes from a mine 1.7 km (1.1 mi) underground and was disinfected with an electrolytic silver solution. It has thus been said by the press that they are drinking the "purest water in China". [29]

It had been reported that, on Shenzhou 5, astronaut Yang Liwei suffered from a "minor heartache" after his launch. It is thought that this refers to space adaptation syndrome experienced by about one third of astronauts during the first few days of a spaceflight. The People's Daily said that the interior design of the spacecraft has been changed to hopefully lessen the likelihood of nausea and other symptoms.

Experiments

It was announced in July 2005 that Shenzhou 6 would carry one experiment involving the sperm of pigs from Rongchang County, Chongqing. [30] But on October 11 it was revealed by Liu Luxiang, director of the Centre for Space Breeding at the Chinese Academy of Agricultural Sciences, that there were no plans for animal or plant seeds on the flight. He said the focus of Shenzhou 6 was the physical reactions of the crew to the space environment. [31] This was seemingly contradicted a year and a half after the flight when sweet potatoes started being sold for Valentine's Day that had been grown from seeds reportedly taken on the flight. [32]

Morris Jones who writes for SpaceDaily.com has speculated that the lack of any other announced experiments suggested that the mission could be oriented more toward the military. The crew could have operated a large surveillance film camera, supplementing the uncrewed recoverable satellite program.

Tracking

Yuanwang 2 in Auckland, New Zealand on October 27, 2005. The ship was resupplying after being at sea to support the flight YuanWang2c.JPG
Yuanwang 2 in Auckland, New Zealand on October 27, 2005. The ship was resupplying after being at sea to support the flight

There are 20 land-based tracking stations in the Chinese space telemetry network. These are supplemented by four Yuanwang -series tracking ships. The Beijing Aerospace Command and Control Center global map showed their positions to be: [33]

Only one other land-based tracking station is outside China — at Swakopmund in Namibia.

Shortly after the Shenzhou 5 flight in 2003, the Pacific nation of Kiribati established diplomatic ties with the Republic of China (Taiwan), leading the People's Republic of China (PRC) to cut off diplomatic ties under its One-China policy. [34] Following this, the PRC has dismantled a tracking station that had been built on Tarawa, the capital island of Kiribati, to track spaceflights. [35]

International reaction

Statements from the Greater China area

Foreign countries and international organizations

See also

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