China launches another secretive Shijian-11 mission

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The Chinese have orbited a new satellite from the Jiuquan Satellite Launch Center on Sunday. Utilizing their Long March 2C (Chang Zheng 2C) launch vehicle, the mission involved another of the secretive Shijian-11 (SJ-11) series of “experimental satellites”. Launch took place at 05:13 UTC according to Chinese reports.

Chinese Launch:

This is the seventh in a series of satellites that – according to the Chinese media – are only known to be “experimental satellites” developed by the China Spacesat Co. Ltd.

As with the previous Shijian-11 satellites, the true mission of Shijian 11-06 was not revealed by the Chinese authorities. However, some observers noted that the Shijian-11 series could be related to a constellation of operational early warning satellites, carrying infrared sensors.

‘Shijian’ means ‘Practice’ and this series of satellites have been used in a variety of configurations and missions for scientific research and technological experiments.

That first Shijian-11 satellite (36088 2009-061A) was launched at 02:45 UTC on November 12, 2009 by the Long March-2C (Y21) from the Jiuquan Satellite Launch Center. This was followed by the second satellite, ShiJian 11-03 (37730 2011-030A), which was lofted into orbit at 04:28 UTC on July 6, 2011, once again by the Long March-2C (Y25) and also from Jiuquan.

Shijian 11-02 (37765 2011-039A) was the third satellite, launched at 07:42 UTC on July 29, 2011 from Jiuquan by the Long March-2C (Y24) launch vehicle. Shijian 11-04 was lost the following August 18 on a rare Long March-2C mishap, although Shijian 11-05 (39202 2013-035A) was successfully launched on July 15, 2013 also by the Long March-2C (Y23) out of Jiuquan. Shijian 11-06 (39624 2014-014A) was launched on March 31, 2014, at 0246UTC using a Long March-2C.

All satellites operate in typical 705 by 690 km, 98.1 degrees orbits.

2014-09-28 10_07_51-index.php (1647×2352)The Chang Zheng 2C (Long March 2C) is a Low Earth Orbit (LEO) launch vehicle derived from DF-5 ICBM. It can be launched from either the Jiuquan Satellite Launch Center or the Taiyuan Satellite Launch Center.

The rocket is a two stage hypergolic launch vehicle with a total length of 35.15 meters, a diameter of 3.35 meters and a total mass of 192,000 kg. The first stage is equipped with four YF-20A engines. Is has a length of 20.52 meters and a burn time of 122 seconds.

The second stage is equipped with one YF-22A engine, and has a length of 7.50 meters with a burn time of 130 seconds.

This launch was the 194th sucessful Chinese orbital launch and the 193rd launch of the Long March launch vehicle family. It was also the 67th successful orbital launch from the Jiuquan Satellite Launch Center, the 4th launch from this space center in 2014 and the 6th orbital launch for China this year.

2014-09-28 10_08_40-Shi Jian 11-07, CZ-2C, JSLC - 05_28UTC, September 28, 2014The Jiuquan Satellite Launch Center, also known as the Shuang Cheng Tze launch center, was the first Chinese satellite launch center.

The site includes a Technical Center, two Launch Complexes, Mission Command and Control Center, Launch Control Center, propellant fueling systems, tracking and communication systems, gas supply systems, weather forecast systems, and logistic support systems.

Jiuquan was originally used to launch scientific and recoverable satellites into medium or low earth orbits at high inclinations.

The 603 Launch Platform for unmanned satellite launches is part of the Launch Complex 43 that also includes the 912 Launch Pad for the manned program. Apart of the launch pads, the launch complex has a technical center where take place the preparations of the launch vehicle and spacecraft.

The technical center is composed of the launch vehicle processing and vertical assembly building, spacecraft processing buildings, solid rocket motor processing building, buildings for liquid-propellant storage and processing and the launch control center.

Although China have taken three months to launch their first satellite of 2014, the pace will soon pick up, with at least 18 launches expected throughout the remainder of the year.

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