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BeiDou Satellite-based Augmentation System
The BeiDou Navigation Satellite System (BDS; ) is a Chinese satellite navigation system. It consists of two separate satellite constellations. The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System and also known as BeiDou-1, consisted of three satellites which, beginning in 2000, offered limited coverage and navigation services, mainly for users in China and neighboring regions. BeiDou-1 was decommissioned at the end of 2012. The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, became operational in China in December 2011 with a partial constellation of 10 satellites in orbit. Since December 2012, it has been offering services to customers in the Asia-Pacific region. In 2015, China launched the third generation BeiDou system (BeiDou-3) for global coverage. The first BDS-3 satellite was launched on 30 March 2015. On 27 December 2018, BeiDou Navigation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterism (astronomy)
An asterism is an observed pattern or group of stars in the sky. Asterisms can be any identified pattern or group of stars, and therefore are a more general concept than the formally defined 88 constellations. Constellations are based on asterisms, but unlike asterisms, constellations outline and today completely divide the sky and all its celestial objects into regions around their central asterisms. For example, the asterism known as the Big Dipper comprises the seven brightest stars in the constellation Ursa Major. Another is the asterism of the Southern Cross, within the constellation of Crux. Asterisms range from simple shapes of just a few stars to more complex collections of many stars covering large portions of the sky. The stars themselves may be bright naked-eye objects or fainter, even telescopic, but they are generally all of a similar brightness to each other. The larger brighter asterisms are useful for people who are familiarizing themselves with the night sky. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long March 3A
The Long March 3A (), also known as the Chang Zheng 3A, CZ-3A and LM-3A, is a Chinese orbital carrier rocket design. It is a 3-stage rocket, and is usually used to place communications satellites and Beidou navigation satellites into geosynchronous transfer orbits. It has formed the basis of the Long March 3B, which is a heavier version with four liquid booster rockets. Launches Long March 3A rockets have been launched from Launch Areas 2 and 3 at the Xichang Satellite Launch Center. List of launches Technical data LM-3A is a 3-stage launch vehicle developed on the basis of LM-3 and LM-2C. Its third stage is powered by cryogenic propellants: liquid hydrogen and liquid oxygen Liquid oxygen—abbreviated LOx, LOX or Lox in the aerospace, submarine and gas industries—is the liquid form of molecular oxygen. It was used as the oxidizer in the first liquid-fueled rocket invented in 1926 by Robert H. Goddard, an applica .... It is dedicated for launching spacecraft into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xinhua
Xinhua News Agency (English pronunciation: )J. C. Wells: Longman Pronunciation Dictionary, 3rd ed., for both British and American English, or New China News Agency, is the official state news agency of the People's Republic of China. Xinhua is a ministry-level institution subordinate to the State Council and is the highest ranking state media organ in China. Xinhua is a publisher as well as a news agency. Xinhua publishes in multiple languages and is a channel for the distribution of information related to the Chinese government and the ruling Chinese Communist Party (CCP). Its headquarters in Beijing are located close to the central government's headquarters at Zhongnanhai. Xinhua tailors its pro-Chinese government message to the nuances of each audience. Xinhua has faced criticism for spreading propaganda and disinformation and for criticizing people, groups, or movements critical of the Chinese government and its policies. History The predecessor to Xinhua was the R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long March 3
The Long March 3 (), also known as the Changzheng 3, CZ-3 and LM-3, was a Chinese orbital carrier rocket design. They were all launched from Launch Area 3 at the Xichang Satellite Launch Center. It was a three-stage rocket, and was mostly used to place DFH-2-class communications satellites into geosynchronous transfer orbits. It was complemented and later replaced by the more powerful Long March 3A The Long March 3A (), also known as the Chang Zheng 3A, CZ-3A and LM-3A, is a Chinese orbital carrier rocket design. It is a 3-stage rocket, and is usually used to place communications satellites and Beidou navigation satellites into geosynchron ..., which has an improved third stage. List of launches Launch failures Dong Fang Hong 2 launch failure On January 29, 1984, a LM-3 rocket failed during launch. The third stage failed 4 s after restart for GTO insertion of the satellite, due to incorrect mixture ratio in the engine gas generator, which caused high temperatures a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xichang Satellite Launch Center
The Xichang Satellite Launch Center (XSLC), also known as the Xichang Space Center, is a spaceport of China. It is located in Zeyuan Town (), approximately northwest of Xichang, Liangshan Yi Autonomous Prefecture in Sichuan. The facility became operational in 1984 and is used to launch numerous civil, scientific, and military payloads annually. It is notable as the site of Sino-European space cooperation, with the launch of the first of two Double Star scientific satellites in December 2003. Chinese officials have indicated interest in conducting additional international satellite launches from XSLC. In 1996, a fatal accident occurred when the rocket carrying the Intelsat 708 satellite failed on launch from the Xichang Satellite Launch Center. Also, a 2007 test of an anti-satellite missile was launched from the center. History China's first crewed space program In order to support the Chinese Project 714 crewed space program in the 1960s, the construction of a new space ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long March 3C
The Long March 3C (), also known as the Changzheng 3C, CZ-3C and LM-3C, is a Chinese orbital launch vehicle. It is launched from Launch Complex 2 and 3 at the Xichang Satellite Launch Center (XSLC). A three-stage rocket with two strapon liquid rocket boosters, it is a member of the Long March 3 rocket family, and was derived from the Long March 3B. It was designed to fill a gap in payload capacities between the Long March 3A and 3B. Launch Statistics Launches It made its maiden flight on 25 April 2008, at 15:35 UTC. The payload for the first launch was the Tianlian I-01 data relay communications satellite. The second carried the Compass-G2 navigation satellite and was conducted on 14 April 2009. The third launch was made on 16 January 2010, with the Compass-G1 satellite. The fourth carrying the Compass-G3 navigation satellite was launched on 2 June 2010. On 1 October 2010, it successfully launched China's second lunar probe, Chang'e 2. An enhanced version, named Lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sohu
Sohu, Inc. () is a Chinese Internet company headquartered in the Sohu Internet Plaza in Haidian District, Beijing. Sohu and its subsidiaries offer advertising, a search engine (Sogou.com), on-line multiplayer gaming (ChangYou.com) and other services. History Sohu was founded as Internet Technologies China (ITC) in 1996 by Charles Zhang after he completed his PhD from the Massachusetts Institute of Technology and received venture capital funding from colleagues he met there. The following year, Zhang changed the name of ITC to Sohoo in homage to Yahoo! after meeting its cofounder, Jerry Yang; the name was soon after changed to Sohu to differentiate it from the American company. Sohu has been listed on NASDAQ since 2000 through a variable interest entity (VIE) based in Delaware. Sohu's Sogou.com search engine was in talks to be sold in July 2013 to Qihoo for around $1.4 billion. On September 17, 2013, it was announced that Tencent has invested $448 million for a minority shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Scientist
''New Scientist'' is a magazine covering all aspects of science and technology. Based in London, it publishes weekly English-language editions in the United Kingdom, the United States and Australia. An editorially separate organisation publishes a monthly Dutch-language edition. First published on 22 November 1956, ''New Scientist'' has been available in online form since 1996. Sold in retail outlets (paper edition) and on subscription (paper and/or online), the magazine covers news, features, reviews and commentary on science, technology and their implications. ''New Scientist'' also publishes speculative articles, ranging from the technical to the philosophical. ''New Scientist'' was acquired by Daily Mail and General Trust (DMGT) in March 2021. History Ownership The magazine was founded in 1956 by Tom Margerison, Max Raison and Nicholas Harrison as ''The New Scientist'', with Issue 1 on 22 November 1956, priced at one shilling (a twentieth of a pound in pre-decimal UK cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Third Taiwan Strait Crisis
The Third Taiwan Strait Crisis, also called the 1995–1996 Taiwan Strait Crisis or the 1996 Taiwan Strait Crisis, was the effect of a series of missile tests conducted by the People's Republic of China (PRC) in the waters surrounding Taiwan, including the Taiwan Strait from 21 July 1995 to 23 March 1996. The first set of missiles fired in mid-to-late 1995 were allegedly intended to send a strong signal to the Republic of China government under President Lee Teng-hui, who had been seen as moving its foreign policy away from the One-China policy. The second set of missiles were fired in early 1996, allegedly intending to intimidate the Taiwanese electorate in the run-up to the 1996 presidential election. Lee's 1995 visit to Cornell The crisis began when President Lee Teng-hui accepted an invitation from his alma mater, Cornell University to deliver a speech on "Taiwan's Democratization Experience". Seeking to diplomatically isolate the Republic of China, the PRC opposed suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yinhe Incident
The ''Yinhe'' incident () occurred after a claim was made in 1993 by the United States government that the China-based container ship ''Yinhe'' () was carrying chemical weapon materials to Iran. The United States Navy forced the surrounding Middle Eastern countries to refuse docking rights to the ''Yinhe'', leaving it in the international waters of the Indian Ocean for twenty-four days. Cutting off their usage of the GPS so that the ship was stranded. Despite eventually concluding that the cargo ship did not contain any precursors of chemical weapons, the U.S. government refused to apologize, stating that "the United States had acted in good faith on intelligence." American officials within the Clinton administration later accused China of deliberately spreading false intelligence in order to cause the incident, without showing any evidence, referring to it as a "sting". It was later changed to claim that during this period, the ''Yinhe'' may have unloaded or dumped its cargo into t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chen Fangyun
Chen Fangyun (; 3 April 1916 – 29 April 2000) was a Chinese electrical engineer. Considered the founder of radio electronics in China, he was pivotal in the development of telemetry, tracking and command (TT&C) systems that control China's satellites and missiles, and in the early development of the BeiDou satellite navigation system. He was an academician of the Chinese Academy of Sciences and the International Academy of Astronautics, and was awarded the Two Bombs, One Satellite Meritorious Medal in 1999. The asteroid 10929 Chenfangyun is named after him. Early life and education Chen was born on 3 April 1916 in Huangyan, Taizhou, Zhejiang, Republic of China. He graduated from Huangyan County Middle School in 1931 and Shanghai Pudong High School in 1934. He entered Tsinghua University in 1934 and graduated with a bachelor's degree in physics in 1938. While a student at Tsinghua, he participated in the December 9th Movement of 1935 against Japanese aggression in North Chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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