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China Outer Space Science, Technology and Explorations: News & Updates

CASC to SpaceX: thanks for testing the new design out before we realize it. Keep up the good work
slide of Long March 9: D10.6m & H114m 1st: 30*200t FFSC methalox engines with 3420t propellant 2nd: 2 engines w/ 370t propellant 3rd: 4*YF-79 25t LH2/LOX with 140t propellant
 
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Deputy Chief Designer JIA Yang on April 15: I'm not sure if the Zhurong rover will be able to wake up. Any ending will be acceptable.

ZHANG Rongqiao on Zhurong: Zhurong keeps hibernation likely due to unexpected dust collection. Electricity wouldn't be enough (140W) if there's 20% more dust than designed limit. 30% means we need to wait until the strongest sunlight. 40% means it would never be able to wake up
 
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23-4-28 15:19 发布于 海南​
【NbSi合金(铌硅合金)在空间站无容器柜完成实验】Nb-Si合金的熔点在2000K以上,是极具战略价值的难熔合金,也是新一代航发的关键材料。目前,西北工业大学王海鹏教授研究团队开展的空间无容器实验,完成首次新一代航发叶片高温难熔合金空间悬浮熔化和凝固实验,得到了不同过冷度凝固实验样品,科学家正在对这些样品展开分析研究。​
目前,无容器材料实验柜已下行三批实验样品,科学家正在开展研究。不久后,第四批实验样品也将随神舟十五号飞船返回舱下行至地面,届时或将产生更多丰硕的研究成果。(中国载人航天办公室)​

China Aerospace
Today at 15:19

[NbSi alloy (niobium silicon alloy) completed the experiment in the containerless cabinet of the space station]

The melting point of Nb-Si alloy is above 2000K. It is a refractory alloy of great strategic value and a key material for a new generation of aero-engines.

At present, the space containerless experiment carried out by the research team of Professor Wang Haipeng of Northwestern Polytechnical University has completed the first space suspension melting and solidification experiment of refractory alloys for a new generation of aeroengine blades, and obtained solidification experimental samples with different supercooling degrees. Scientists are analyzing and studying these samples.

So far three batches of experimental samples have been returned from the containerless material experimental cabinet. Soon, the fourth batch of experimental samples will also return to the ground with the return capsule of the Shenzhou 15 spacecraft, and more fruitful research results may be expected by then. (China Manned Spaceflight Office)

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HKU Astrophysicists Reveal the Nature of Dark Matter through the Study of Crinkles in Spacetime​

Most of the matter in the universe, amounting to a staggering 85% by mass, cannot be observed and consists of particles not accounted for by the Standard Model of Particle Physics (see remark 1). These particles are known as Dark Matter, and their existence can be inferred from their gravitational effects on light from distant galaxies. Finding the particle that makes up Dark Matter is an urgent problem in modern physics, as it dominates the mass and, therefore, the gravity of galaxies – solving this mystery can lead to new physics beyond the Standard Model. While some theoretical models propose the existence of ultramassive particles as a possible candidate for Dark Matter, others suggest ultralight particles.

A team of astrophysicists led by Alfred AMRUTH, a PhD student in the team of Dr Jeremy LIM of the Department of Physics at The University of Hong Kong (HKU), collaborating with Professor George SMOOT, a Nobel Laureate in Physics from the Hong Kong University of Science and Technology (HKUST) and Dr Razieh EMAMI, a Research Associate at the Center for Astrophysics | Harvard & Smithsonian (CFA), has provided the most direct evidence yet that Dark Matter does not constitute ultramassive particles as is commonly thought but instead comprises particles so light that they travel through space like waves. Their work resolves an outstanding problem in astrophysics first raised two decades ago: why do models that adopt ultramassive Dark Matter particles fail to correctly predict the observed positions and the brightness of multiple images of the same galaxy created by gravitational lensing? The research findings were recently published in Nature Astronomy.

 
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科技日报
23-5-30 13:10

来自 微博网页版

#北斗短报文应用将成手机标配##国内首款北斗短报文手机芯片量产破千万# 5月30日,中国电科在2023中关村论坛上联合发布重大成果“北斗卫星通信融入大众智能手机及实现产业化”。中国电科导航领域首席专家王振岭表示,该成果意味着北斗短报文应用将逐渐成为智能手机的“标配”。

今年2月,一条“驴友贡格尔草原遇大雪迷路,靠手机卫星通信自救”的新闻引发关注。该事件中,“驴友”使用手机上自带的卫星通信功能,发出求救信号,并且附带精准的坐标信息,最后成功获救。

中国电科首席科学家蔚保国表示,实现该功能的关键,是国内首颗智能手机北斗短报文通信射频基带一体化芯片。据介绍,该芯片攻克了大众手机应用体制弱信号情况下快速捕获、可靠译码等关键技术,创新实现“不换卡、不换号、不增加外设”的“一号双网”设计。其装入手机后,能在荒漠地区、出海遇险、地震救援等无地面网络覆盖情况下,支撑应急通信、搜索救援等需求,为我国及周边国家区域用户提供紧急通信保底手段,有效解决“不在服务区”难题。

“目前,这款芯片可以接入任何手机,同时北斗也打通了短报文平台与三大运营商的连接,任何手机内置这一块芯片后,即可连接北斗卫星,发送消息给北斗。”王振岭说。据悉,目前国内首款北斗短报文手机芯片量产已突破千万,在手机中应用技术已发展成熟。(杨双 科技日报记者 付毅飞,图源:中国北斗卫星导航系统)

Translation:

Science and Technology Daily
23-5-30 13:10
From Weibo web version


#Domestic first Beidou short message mobile chip mass production breaks 10 million#

On May 30, CETC announced a major achievement "Integrating Beidou satellite communication into smartphones and realizing mass industrialization".

Wang Zhenling, chief expert in the navigation field of CETC, said that this achievement means that the Beidou short message application will gradually become a "standard feature" of smartphones.

In February of this year, a piece of news that "donkey friend" (NOTE: Chinese internet slang for outdoor adventurer/backpacker) Gongger lost his way in heavy snow in the grassland and relied on mobile phone satellite communication to save himself" attracted attention. In this incident, the "donkey friend" used the satellite communication function of the mobile phone to send out a distress signal with accurate coordinate information, and was finally rescued successfully.

Wei Baoguo, Chief Scientist of CETC, said that the key to realizing this function is China's first Beidou short message communication radio frequency baseband integrated chip for smartphones. According to reports, the chip overcomes key technologies such as fast capture and reliable decoding under the weak signal of the mass mobile phone application system, and innovatively realizes the "one-number dual-network" design of "no changing cards, no changing numbers, and no additional peripherals". After it is loaded into the mobile phone, it can support emergency communication, search and rescue and other needs in desert areas, sea distress, earthquake rescue and other situations where there is no ground network coverage, and provide emergency communication guarantee means for users in my country and surrounding countries and regions, effectively solving the problem of "missing service area" problem.

"At present, this chip can be connected to any mobile phone. At the same time, Beidou has also opened up the connection between the short message platform and China's three major telecom operators. After any mobile phone has this chip built in, it can connect to Beidou satellites and send messages to Beidou." Wang Zhenling explain. It is reported that the mass production of the first Beidou short-message mobile phone chip in China has exceeded 10 million, and the application technology in mobile phones has matured. (Yang Shuang Science and Technology Daily reporter Fu Yifei, source: China Beidou Satellite Navigation System)
 
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China, using its Large High Altitude Air Shower Observatory (LHAASO), High Energy Burst Searcher (HEBS), and Hard X-ray Modulation Telescope, has observed the brightest gamma-ray burst ever. The GRB 221009A is over 10 times brighter than the brightest gamma-ray burst seen before.
Result published in Science journal.

Recording the entire process of a tera-electron volt #gamma-rayburst during the death of a massive star
@sciencemagazine https://doi.org/gsbxwk
 
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Finally construction start.

National Astronomical Observatories of China broke ground for world's largest 110-m Aperture Steerable Radio Telescope, QiTai radio Telescope (QTT), in Qitai County, Xinjiang. The construction is expected to take 6 years.
来自 微博网页版​
【媲美“中国天眼”的它将成为全球最大、精度最高的全向可动射电望远镜!】近日,中国电科39所成功突破基于主副伺协同控制的大口径天线高精度控制技术,为高质量建设中国科学院新疆天文台110米口径全向可动射电望远镜奠定坚实基础。110米口径全向可动射电望远镜坐落在新疆昌吉州奇台县,是可以媲美“中国天眼”FAST的重大科技基础设施。建成后,将成为全球最大、精度最高的全向可动射电望远镜,在纳赫兹引力波、快速射电暴、黑洞、暗物质等前沿领域开展科学研究,为我国空间活动提供强大技术支撑。​
CETC
23-6-19 10:42 From Weibo web version

[Comparable to the "China Sky Eye"(FAST telescope), it will become the world's largest and most precise omnidirectional movable radio telescope! 】

Recently, CETC 39 successfully broke through the high-precision control technology of large-aperture antennas based on the coordinated control of the main and auxiliary servos, laying a solid foundation for the high-quality construction of the 110-meter-caliber omnidirectional movable radio telescope of the Xinjiang Observatory of the Chinese Academy of Sciences. The 110-meter-aperture omnidirectional movable radio telescope is located in Qitai County, Changji Prefecture, Xinjiang. It is a major technological infrastructure comparable to the "China Sky Eye" FAST. After completion, it will become the largest and most precise omnidirectional movable radio telescope in the world. It will carry out scientific research in frontier fields such as nanohertz gravitational waves, fast radio bursts, black holes, and dark matter, and provide strong technical support for my country's space activities.
 
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China will attempt to use two launch vehicles to send a moon surface lander and manned spacecraft into lunar orbit, as part of the country’s planned manned moon landing before 2030. Taikonauts will carry out long-term, systematic lunar research and verify relevant technology, CMSA official said at 9th CCAF in #Wuhan.
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  • China's lunar landing system will be ~26t
  • a lander to carry 2 astronauts to/from Moon's surface & a propulsion module
  • Lunar rover ~200kg; supports 8-hour activity with lunar spacesuit
  • Crewed spacecraft ~26t; 3-member crew to Moon; same return module for 4~7 crew LEO
 
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