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China Space Military:Recon, Satcom, Navi, ASAT/BMD, Orbital Vehicle, SLV, etc.

YF-77 liquid hydrogen-liquid oxygen rocket engine for Long March 5 core stage on display.

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Picture showing the Long March 5 core stage liquid hydrogen tank undergoing cryogenic static test.

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And, on June 29, UHF Satcom, a hobbyist satellite radio monitoring site, report receiving Yutu signal.

UHF Satcom ‏@uhf_satcom
Awesome, the YUTU lunar rover is back in town with a downlink on 8462.028MHz !​
 
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:enjoy:

A1982/15 - A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED
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BACK TO START. VERTICAL LIMITS:GND-UNL. GND - UNL,
20 JUL 00:50 2015 UNTIL 20 JUL 01:30 2015. CREATED: 18 JUL 13:02 2015

A1983/15 - A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED BY:
N405318E0901713 N412019E0900743 N411912E0911922 N405211E0911823
BACK TO START. VERTICAL LIMITS:GND-UNL. GND - UNL,
20 JUL 00:50 2015 UNTIL 20 JUL 01:30 2015. CREATED: 18 JUL 13:04 2015

A1984/15 - A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED
BY:N410410E0870114-N411708E0870055-N411741E0880022-N410443E0880029
BACK TO START. VERTICAL LIMITS:GND-UNL. GND - UNL,
20 JUL 00:50 2015 UNTIL 20 JUL 01:30 2015. CREATED: 18 JUL 13:05 2015

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http://太原基地有武器飞行试验活动 - 军事天地 - 鼎盛论坛 -
 
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China to launch scientific satellite in 2016
SJ-10 satellite will carry out 19 experiments in six fields




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A Long March-4B rocket loaded with CBERS-4 satellite, developed by China and Brazil, blasts off from its launch pad at Taiyuan Satellite Launch Centre in Taiyuan, Shanxi province, on December 7, 2014.
BEIJING – Chinese scientists are planning to launch a retrievable scientific research satellite in the first half of 2016.


The satellite – SJ-10 – will carry out research in microgravity and space life science to provide scientific support to manned space missions and space scientists on Earth, said project chief Hu Wenrui. All key components of the satellite have been tested and are functioning well, and it is expected to launch from the Jiuquan Satellite Launch Centre in northwest China's Gansu province.


The satellite will carry out 19 experiments in six fields included microgravity fluid physics, microgravity combustion, space material science, space radiation effect, microgravity biological effect and space biological techniques, Xinhua reported.


Eight experiments in fluid physics will be conducted in the orbital module, and the other experiments will be conducted in the reentry capsule, which is designed to return to Earth after 12 days in orbit. The orbital module will keep operating in orbit for three more days.


According to Huang Chenguang – vice head of the Institute of Mechanics with the Chinese Academy of Sciences (CAS) – the SJ-10 is the second satellite in a space studies programme consisting of five scientific satellites. The SJ-10 project has been carried out under 11 institutes of the CAS and six Chinese universities in cooperation with the European Space Agency and Japan Aerospace Exploration Agency.


The first satellite of the space studies programme is a dark matter particle explorer satellite, expected to be launched by the end of this year. The programme also plans to launch a satellite for quantum science experiments and a hard X-ray telescope for black hole and neutron star studies within the next two years.
China to launch scientific satellite in 2016
 
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在天津厂区完成测试的长征五号芯二级动力系统试车箭
CZ-5 core second stage power system test module in Tianjin factory.

左侧是5米直径的二级液氢储箱,右侧是3.35米直径的二级液氧储箱。
On the left is 5m diameter liquid hydrogen tank, on the right is 3.35m liquid oxygen tank.

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7月24日15时8分,我国在研长征五号运载火箭,在北京成功进行了芯二级首次动力系统试车。此次试车是我国迄今为止开展的最长时间系统级火箭动力试车,也是长征五号运载火箭转入发射场合练阶段的重要前提,对于按期实现成功首飞具有重要意义。

国防科工局副局长、国家航天局副局长吴艳华,国防科工局科技委主任栾恩杰在现场指导试车。
  用于此次试验的长征五号运载火箭芯二级产品,直径5米,总长约11米,使用无毒无污染的液态氧和液态氢作为火箭发动机推进剂。点火后,火箭芯二级动力系统按照真实飞行时序,圆满完成了两次启动点火,考核验证了芯二级模块设计方案的正确性和工作协调性。

  长征五号运载火箭不仅是我国首型全新研制的新一代运载火箭,也是我国目前运载能力最大的运载火箭,承担着后续探月工程三期、载人空间站等多个国家重大科技专项发射任务,目前已进入工程研制决战决胜阶段。

7月24日下午15点29分,由大火箭研制生产的“长征五号”运载火箭成功完成二级动力系统试车第一次试验,全面验证各系统性能。长征五号是我国目前运载能力最大、尺寸最大的火箭,计划于2016年首飞,其研制生产工作凝聚着全体大火箭人的心血。

At 15:08 on July 24 in Beijing, start of first test of core second stage power system. The test follow actual flight sequence with twice ignition firing. It successfully completed at 15:29.
 
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Chinese Long March 3B launches dual Beidou mission

China launched a new pair of navigation satellites in the move to advance the completion of the Phase III of its Beidou program. The launch took place around 12:30 UTC from the LC launch comple of the Xichang Satellite Launch Center, using for the first time the combination of the Long March-3B rocket with the new Expedition-1 (Yuanzheng-1) upper stage.

Chinese Launch:

The Beidou Phase III system includes the migration of its civil Beidou 1 or B1 signal from 1561.098 MHz to a frequency centered at 1575.42 MHz, the same as the GPS L1 and Galileo E1 civil signals.

Its transformation from a quadrature phase shift keying (QPSK) modulation to a multiplexed binary offset carrier (MBOC) modulation is similar to the future GPS L1C and Galileo’s E1.

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The current Beidou constellation of geostationary (GEO) -– five inclined geosynchronous orbit (IGSO), and four middle Earth orbiting (MEO) –- spacecraft are transmitting open and authorized signals at B2 (1207.14 MHz) and an authorized service at B3 (1268.52 MHz).

Real-time, stand-alone Beidou horizontal positioning accuracy was classed as better than six meters, with a vertical accuracy better than 10 meters.

The Compass Navigation Satellite System (CNSS) is China’s satellite navigation system, approved by the Chinese government in 2004, capable of providing continuous, real-time passive 3D geo-spatial positioning and speed measurement.

The long-term goal is to develop a global navigation satellite network similar to the GPS and GLONASS by 2020, eventually consisting a constellation of 35 vehicles, including 27 MEO (21,500 km orbits) satellites, three IGSO satellites (inclined at 55 degrees) and five GSO satellites.
The system will be dual use, based on a civilian service that will provide an accuracy of 10 meters in the user position, 0.2 m/s on the user velocity and 50 nanoseconds in time accuracy; and the military and authorized user’s service, providing higher accuracies.

The first phase of the project will involve coverage of the Chinese territory. However, the future Compass constellation will cover the entire globe.

The new satellites –- Beidou M1-S and Beidou M2-S – –use a new dedicated bus that feature a phased array antenna for navigation signals and a laser retroreflector. The launch mass is about 800 kg and the satellites have an operational lifespan of five years.

Launch vehicle and launch site:

This mission was also the first flight of the Long March-3B/YZ-1 (Chang Zheng-3B/YZ-1) version of the Long March-3B.

Developed from the Chang Zheng-3A, the Chang Zheng-3B is the most powerful launch vehicle on the Chinese space launch fleet.

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The CZ-3B features enlarged launch propellant tanks, improved computer systems, a larger 4.2 meter diameter payload fairing and the addition of four strap-on boosters in the core stage that provide additional help during the first phase of the launch.

The rocket is capable of launching a 11,200 kg satellite to a low Earth orbit or a 5,100 kg cargo to a geosynchronous transfer orbit.

The CZ-3B/G2 (Enhanced Version) launch vehicle was developed from the CZ-3B, increasing the GTO capacity up to 5,500kg. The CZ-3B/E has nearly the same configurations with CZ-3B bar its enlarged core stage and boosters.

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On May 14, 2007, the first flight of CZ-3B/G2 was performed successfully, accurately sending the NigcomSat-1 into pre-determined orbit. With the GTO launch capability of 5,500kg, CZ-3B/G2 is dedicated for launching heavy GEO communications satellite.

The rocket structure also combines all sub-systems together and is composed of four strap-on boosters, a first stage, a second stage, a third stage and payload fairing.

The first two stages – as well as the four strap-on boosters – use hypergolic (N2O4/UDMH) fuel while the third stage uses cryogenic (LOX/LH2) fuel. The total length of the CZ-3B is 54.838 meters, with a diameter of 3.35 meters on the core stage and 3.00 meters on the third stage.

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On the first stage, the CZ-3B uses a YF-21C engine with a 2,961.6 kN thrust and a specific impulse of 2,556.5 Ns/kg. The first stage diameter is 3.35 m and the stage length is 23.272 m.

Each strap-on booster is equipped with a YF-25 engine with a 740.4 kN thrust and a specific impulse of 2,556.2 Ns/kg.

The strap-on booster diameter is 2.25 m and the strap-on booster length is 15.326 m.

The second stage is equipped with a YF-24E (main engine – 742 kN / 2,922.57 Ns/kg; four vernier engines – 47.1 kN / 2,910.5 Ns/kg each). The second stage diameter is 3.35 m and the stage length is 12.920 m.

The third stage is equipped with a YF-75 engine developing 167.17 kN and with a specific impulse of 4,295 Ns/kg. The fairing diameter of the CZ-3B is 4.00 meters and has a length of 9.56 meters.

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The Yuanzheng-1 (“Expedition-1) uses a small thrust 6.5 kN engine burning UDMH/N2O4 with specific impulse at 3,092 m/s. The upper stage should be able to conduct two burns and has a 6.5 hour lifetime.

It will be adapted for use on the CZ-3A/B/C series mainly for direct MEO/GEO insertion missions (mostly for the navigation satellites of the Beidou GNSS).

The Xichang Satellite Launch Centre is situated in the Sichuan Province, south-western China and is the country’s launch site for geosynchronous orbital launches.

Equipped with two launch pads (LC2 and LC3), the centre has a dedicated railway and highway lead directly to the launch site.

The Command and Control Centre is located seven kilometers south-west of the launch pad, providing flight and safety control during launch rehearsal and launch.

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The CZ-3B launch pad is located at 28.25 deg. N – 102.02 deg. E and at an elevation of 1,825 meters.

Other facilities on the Xichang Satellite Launch Centre are the Launch Control Centre, propellant fuelling systems, communications systems for launch command, telephone and data communications for users, and support equipment for meteorological monitoring and forecasting.

The first launch from Xichang took place at 12:25UTC on January 29, 1984, when the Chang Zheng-3 (CZ3-1) was launched the Shiyan Weixing (14670 1984-008A) communications satellite into orbit.
 
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Love the sound @#3: shrieking excitement of the kids and crackling propulsion of the rocket

Go China!

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China's men's 4x100-meter relay team broke the Asian record
as they raced to victory at the Asian Games in Incheon, 2014
 
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China launches 2 satellites for independent navigation system
2015-07-26 08:50 Xinhua Editor: Li Yan

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A Long March-3B/Yuanzheng-1 rocket carrying two new-generation satellites for the BeiDou Navigation Satellite System (BDS) blasts off from the Xichang Satellite Launch Center in the southwest China's Sichuan Province, July 25, 2015. China successfully launched two satellites for its indigenous global navigation and positioning network at 8:29 p.m. Beijing Time Saturday, the launch center said. (Xinhua/Zhu Zheng)

China successfully launched two satellites for its indigenous global navigation and positioning network at 8:29 p.m. Beijing Time Saturday, the launch center said.

Launched from the Xichang Satellite Launch Center in the southwestern China's Sichuan Province, the two satellites were the 18th and 19th for the Beidou Navigation Satellite system, China's homegrown navigation system.

They were sent into their preset orbits by a Long March-3B/Expedition-1 carrier rocket 3.5 hours after the launch, the center said.

Expedition-1, or Yuanzheng-1, is an independent aircraft installed on the carrier rocket with the ability of sending one or more spacecraft into different orbits in space.

The successful launch marks another solid step in building Beidou into a navigation system with global coverage, the center said.

The two satellites will join the 17th one, which was launched in late March, in the mission of testing a new type of navigation signaling and inter-satellite links, and also provide navigation services as a part of the network, the center said.

This launch was the 206th flight of China's Long March carriers.

China launched the first satellite for Beidou in 2000. The Beidou system began providing positioning, navigation, timing and short message services to civilian users in China and surrounding areas in the Asia-Pacific in December 2012.

The system has been gradually put into use in extended sectors including transportation, weather forecasting, marine fishing industry, forestry and telecommunications.


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