Errymath: Long March 3B

<div dir="ltr" style="text-align: left;" trbidi="on">
<br />
<h3 class="post-title entry-title" itemprop="name">
</h3>
<div class="post-header">
</div>
<div class="post-body entry-content" id="post-body-4360117940248414434" itemprop="description articleBody">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5PuYq0MAM68iGEd2vdillzBhSeP1x-SNeR1zabczFrxil7CpQoByIt9RMqY1hA-E5i9edjik8cqEYvHsgNN_cP7LqHjONpAOjoa46dOH7R54TC8E7YEANlkY2QD522XaVkvUr-6tz0Zuh/s1600/Chinese+military+satellite+launched+into+orbit.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="532" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5PuYq0MAM68iGEd2vdillzBhSeP1x-SNeR1zabczFrxil7CpQoByIt9RMqY1hA-E5i9edjik8cqEYvHsgNN_cP7LqHjONpAOjoa46dOH7R54TC8E7YEANlkY2QD522XaVkvUr-6tz0Zuh/s640/Chinese+military+satellite+launched+into+orbit.jpg" width="640" /></a><br />
<div dir="ltr" style="text-align: left;">
A super-secretive satellite was launched from the Xichang 
Satellite Launch Center on Saturday. Launch of the unknown spacecraft – 
unofficially claimed to be the Communications Engineering Test Satellite
 -1 (TXJSSY-1) – took place at 15:40 UTC using a Long March-3B (Chang 
Zheng-3B) rocket.<span style="font-size: medium;"><br /></span>
<br />
<br />
<br />
There is very little information regarding the satellite, 
however rumors circling on specialized Chinese space forums point to 
this launch involving the first Great Wall (Changcheng) satellite – a 
new series of Chinese satellites dedicated to early warning similar to 
the American Space Based Infra-Red Sensor satellites. One unofficial 
source claimed the spacecraft is the Communications Engineering Test 
Satellite -1 (TXJSSY-1)<br />
<br />
Recently, Japan’s Kyodo News reported that China was building a missile 
defense system to detect a ballistic missile attack. The report was 
based on Chinese military documents that referred the development of an 
experimental early warning satellite program.<br />
<br />
Additionally the report pointed out that China had started the 
development of an X-band radar system as part of a ground-based 
interceptor system.<br />
<br />
<br />
<b><span style="font-size: medium;">Launch vehicle and launch site:</span></b><br />
<br />
Developed from the Chang Zheng-3A, the Chang Zheng-3B is the most 
powerful launch vehicle on the Chinese space launch fleet.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.<br />
<br />
The rocket is capable of launching an 11,200 kg satellite to a low Earth
 orbit or a 5,100 kg cargo to a geosynchronous transfer orbit.<br />
<br />
The CZ-3B/G2 (Enhanced Version) launch vehicle was developed from the CZ-3B, increasing the GTO capacity up to 5,500kg.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
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.<br />
<br />
The CZ-3B can also use the new Yuanzheng-1 (“Expedition-1″) upper stage 
that uses a small thrust 6.5 kN engine burning UDMH/N2O4 with a specific
 impulse at 3,092 m/s. The upper stage is able to conduct two burns, 
having a 6.5 hour lifetime and is capable of achieving a variety of 
orbits. This upper stage was not used on this launch.<br />
<br />
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.<br />
<br />
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.<br />
<br />
The CZ-3B launch pad is located at 28.25 deg. N – 102.02 deg. E and at an elevation of 1,825 meters.<br />
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.<br />
<br />
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.</div>
</div>
<br />
<br /></div>

A super-secretive satellite the Communications Engineering Test Satellite -1 (TXJSSY-1) was launched from Xichang Satellite Launch Center

A super-secretive satellite was launched from the Xichang Satellite Launch Center on Saturday. Launch of the unknown spacecraft – ...

Errymath

A super-secretive satellite the Communications Engineering Test Satellite -1 (TXJSSY-1) was launched from Xichang Satellite Launch Center

Latest

Archive

Subscribe