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

[JSCh]

A PLANETARY RADAR TRANSMITTER could emit radiation to affect the environment and some commercial activity.

China has several large telescopes in coastal areas, such as the 65 Tianma telescope in Shanghai, but Li and colleagues said local residents might protest against running such a facility in densely populated areas.

Developed areas also had more air traffic and communication networks were susceptible to interference when the radar was on, they said.

Another candidate site considered by researchers is the FAST telescope in Pingtan, Guizhou. It has a 500-metre-wide radio dish, the largest in the world. But upgrading Fast to a planetary radar had many technical challenges, according to Li.


These issues made Xinjiang the most promising candidate site. The autonomous region in western China has low population density – among the lowest in the country.

Several advanced antenna arrays are already up and running there. In Qitai, a county less than 200km (125 miles) from Urumqi in Xinjiang, a 110-METRE STEERABLE TELESCOPE – nearly 60 PER CENT WIDER than Goldstone – is under construction and expected to be finished by 2023.

The planetary radar can also monitor other targets such as space debris. It will be a DUAL-USE FACILITY serving both military and civilian purposes. The design, construction and operation will be led by the Chinese military with collaboration from civil institutes such as the National Astronomical Observatories under the Chinese Academy of Sciences, according to a Beijing-based astronomer informed about the project.

（…）

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hahaha, I have never read about the Qitai giant telescope...even much bigger than the US' largest one in Goldstone, and suddenly popped up an article saying the need for a planetary radar to track asteroid... yet China has been half-way building one sounds like an explanation is given afterwards.

And I am still trying to fathom the size of the telescope having DISH diameter of 110 meters... and steerable...

Regulator gives go-ahead to major Xinjiang telescope
By Zhang Zhihao | China Daily | Updated: 2018-01-12 08:51

Plans to build one of the world's largest moving single-dish radio telescopes in northwestern China have been given the green light, it was announced on Thursday.

Schedule for first operation in 2023.

 

[IblinI]

China launches new communication technology experiment satellite
Source: Xinhua| 2021-02-05 00:40:25|Editor: huaxia

XICHANG, Feb. 4 (Xinhua) -- China successfully launched a new communication technology experiment satellite from the Xichang Satellite Launch Center in southwest China's Sichuan Province on Thursday.

The satellite was launched at 11:36 p.m. (Beijing Time) by a Long March-3B carrier rocket and entered the planned orbit successfully.

It will be used in communication, radio, television and data transmission, as well as technology tests.

This launch marked the 360th mission for the Long March series carrier rockets.
(Photo by Zhang Jing/Xinhua)

View attachment 713721
View attachment 713719​

@Deino This is actually huge.

 

[samsara]

@Deino This is actually huge.

pls explain what's its special significance... just don't get it.

Schedule for first operation in 2023.

oh okay, thx, my bad memory or simply missed that piece of news.

It takes more than five year to put that giant telescope into operation... what a huge telescope project!!

 

[IblinI]

pls explain what's its special significance... just don't get it.

https://lt.cjdby.net/forum.php?mod=viewthread&tid=2697876&extra=page%3D1

 

[Daniel808]

@Deino This is actually huge.

pls explain what's its special significance... just don't get it.



oh okay, thx, my bad memory or simply missed that piece of news.

It takes more than five year to put that giant telescope into operation... what a huge telescope project!!

Many space-watchers realize, TJSW-6 Satellite is not an ordinary communication satellite.

It's an Early Warning Satellite for Ballistic Missile Defence

https://twitter.com/x/status/1357758802343448576

https://twitter.com/x/status/1357488417400004610

 

[Han Patriot]

《有话好说——探秘火星》 参与直播互动赢《中国新闻》定制礼品

我在央视频，邀你一起看更多有品质视频

m.yangshipin.cn

Tianwen-1 live stream orbital insertion. 730 Beijing time.

 

[samsara]

《有话好说——探秘火星》 参与直播互动赢《中国新闻》定制礼品

我在央视频，邀你一起看更多有品质视频

m.yangshipin.cn

Tianwen-1 live stream orbital insertion. 730 Beijing time.

This one works!

[直播]天问一号进入环火轨道 [Live]Tianwen-1 reaching Mars

 

[Han Patriot]

This one works!

[直播]天问一号进入环火轨道 [Live]Tianwen-1 reaching Mars

Success but the stupid transmission went off. Xinhua already declared and confirmed by German dish.

 

[Deino]

Arriving at Mars seen from Tianwen-1

https://twitter.com/x/status/1360147974282743809

und

https://twitter.com/x/status/1360149027342458881

 

[JSCh]

China launches new satellites to survey electromagnetic environment
Source: Xinhua| 2021-02-24 11:02:47|Editor: huaxia

JIUQUAN, Feb. 24 (Xinhua) -- The third group of China's Yaogan-31 remote sensing satellites were sent into space from the Jiuquan Satellite Launch Center in northwest China at 10:22 a.m. (Beijing Time) Wednesday.

The satellites were carried by a Long March-4C rocket. It was the 361st flight mission of the Long March carrier rocket series, the launch center said.

Having entered their planned orbits, the satellites will be used for electromagnetic environment surveys and other related technology tests.

China launched the first and second Yaogan-31 satellite groups on April 10, 2018 and Jan. 29 this year, respectively.

 

[JSCh]

China launches medium-lift Long March-7A carrier rocket
Source: Xinhua| 2021-03-12 02:47:08|Editor: huaxia

A long march-7A Y2 carrier rocket blasts off from the Wenchang Spacecraft Launch Site, south China's Hainan Province, March 12, 2021. China launched its Long March-7A Y2 carrier rocket on Friday from the Wenchang Spacecraft Launch Site in south China's island province of Hainan. The rocket blasted off at 1:51 a.m. (Beijing Time) from the launch site, sending an experimental satellite into the planned orbit. The satellite will be mainly used for in-orbit tests of new technologies including space environment monitoring. (Xinhua/Yang Guanyu)

WENCHANG, Hainan, March 12 (Xinhua) -- China launched its Long March-7A Y2 carrier rocket on Friday from the Wenchang Spacecraft Launch Site in south China's island province of Hainan.

The rocket blasted off at 1:51 a.m. (Beijing Time) from the launch site, sending an experimental satellite into the planned orbit.

The satellite will be mainly used for in-orbit tests of new technologies including space environment monitoring.

A modified version of the Long March-7 rocket, the launch vehicle represents the new generation of China's medium-sized high-orbit rocket. It has a carrying capacity of at least 7 tonnes for the geosynchronous orbit.

This was the 362nd flight mission of the Long March rocket series.

​

 

[JSCh]

China launches new satellites to survey electromagnetic environment
Source: Xinhua| 2021-03-13 13:07:08|Editor: huaxia

A Long March-4C rocket carrying the fourth group of China's Yaogan-31 remote sensing satellites blasts off from the Jiuquan Satellite Launch Center in northwest China, March 13, 2021. (Photo by Wang Jiangbo/Xinhua)

JIUQUAN, March 13 (Xinhua) -- The fourth group of China's Yaogan-31 remote sensing satellites were sent into space from the Jiuquan Satellite Launch Center in northwest China at 10:19 a.m. (Beijing Time) Saturday.

The satellites were carried by a Long March-4C rocket and have entered their planned orbits.

The satellites will be used for electromagnetic environment surveys and other related technology tests.

It was the 363rd flight mission of the Long March carrier rocket series.

 

[samsara]

From Henri Kenhmann at East Pendulum on 2021.03.13:

The SY-9 satellite, launched on March 12 by the CZ-7A Y2 launcher upon return to flight of this medium power launcher. This family of new generation launchers will eventually replace the CZ-3 family.

According to some local sources, the SY-9 satellite would have a mass of more than 6 tonnes.

https://twitter.com/x/status/1370694630912581633

This new type of launcher experienced failure on its maiden flight on March 16, 2020.

 

[samsara]

From stromgade @stromgade on 2021.03.13:

As expected, the YG-31-04 group (i.e. the 4th triplet group, a typo at the original tweet) has filled the gap in the constellation. All the six orbital planes are now equally spaced, so the constellation is complete.

On the images,
the 1st-generation satellites are in yellow,
2nd generation in red,
Yaogan 31-02, -03 and -04 in GREEN.

https://twitter.com/x/status/1370676305046421505

Read the corresponding article here:

The Chinese maritime surveillance system

A space-based maritime surveillance system, with electronic intelligence, radar and optical satellite constellations. The aim of this article is to give a survey of these constellations, and to assess how much their combined capabilities give China an accurate and comprehensive picture of the situation at sea.

Conclusion

Thanks to its satellites, China has optical, radar and electronic capabilities to detect, identify and track ships at sea. Even without taking into account real-time tracking from geostationary orbit, the wide-angle JB-9 constellation and the JB-5 and JB-7 SAR constellations can find contacts in a vast area every day, and have a good chance of refreshing the location of the most interesting ships every few hours. Consequently, it seems unlikely a naval group could hide in the ocean for long.

However, when the weather is very cloudy, only the SAR satellites are able to look through, which severely limits the capabilities of the system. This does not mean China is blind: other means of detection, such as it trans-horizon radars, or its long range patrol aircrafts can complement the satellite system, and help challenge the defenses of US aircraft carriers. This makes a US intervention in a new Taiwan Strait crisis much more risky, and consequently less likely.

The Chinese maritime surveillance system

An analysis of the Chinese reconnaissance satellites, and their maritime surveillance capabilities This article initially appeared on eastpendulum.com, a French-language blog about the Chinese mili…

satelliteobservation.net

With the launch of Yaogan-31 group 04, there are now 6 regularly-spaced orbital planes, so the constellation is likely complete:

YG 31-02 a/b/c same 2021 New plane

YG 31-03 a/b/c same 2021 New plane

YG 31-04 a/b/c same 2021 New plane

'same' refers to Local time of passage is VARIABLE, as the orbit is not Sun-Synchronous (non-SSO)

year refers to Launch year

New orbital plane

 

[samsara]

The 24-hour revisit diagram of the coverage over Taipei for the JianBing 8 (JB-8), the Chinese military satellite constellation (the triplet satellites of Yaogan-20, YG-25, YG-31, YG-31-02, YG-31-03, YG-31-04), with a 5-degree minimum incidence angle. (2021-03-14)

In video:

https://twitter.com/x/status/1371052766320336896

The related article:

The Chinese maritime surveillance system

An analysis of the Chinese reconnaissance satellites, and their maritime surveillance capabilities This article initially appeared on eastpendulum.com, a French-language blog about the Chinese mili…

satelliteobservation.net

JianBing 建兵 lit. to build soldiers
Yaogan 遥感 lit. remote sensing