Information about the changes in the motherland

Long March 1 (CZ- 1) is a three-stage launch vehicle developed for launching China's first artificial satellite. The total length is 29.46m, the maximum diameter is 2.25m, the takeoff mass is 8 1.5t, and the carrying capacity in low earth orbit is 300kg.

The Long March 1 rocket was developed in 1965. 1969165438+10, the first test flight of the Long March-1 rocket failed to enter the orbit due to a secondary fault.

1970 On April 24th, China's first artificial earth satellite, Dongfanghong-1, was successfully sent into space for the first time. The rocket was launched three times by satellite, and the success rate was 66.67%. The third launch time is 197 1 year.

2. Beidou satellite navigation test system

Various types of user computers. The central control system can share information with other systems through the ground network, and can provide system data needed for command and control for group users.

Beidou satellite navigation test system can realize regional continuous navigation and positioning, short digital message communication and time service. Beidou satellite navigation test system is also called Beidou-1.

It is the first generation test system of Beidou satellite navigation system, which adopts active positioning and consists of three parts: the ground control center of three positioning satellites (two working satellites and one backup satellite) and the user terminal.

Beidou-1 satellite navigation and positioning system can provide users with all-weather real-time positioning service. The calibration accuracy is 20m, and the uncalibrated accuracy is 100m.

3. Tianhe II Supercomputer

Tianhe-2 is a supercomputer system developed by National University of Defense Technology, ranking first with its excellent performance of peak operation speed of 549 million times per second and continuous operation speed of 339 million times per second.

20 13 becomes the fastest supercomputer in the world. In the list of the top 500 supercomputers published in 17 10 on October 2010, China Tianhe II won the championship for the fourth time in a row, nearly twice as fast as the second American Titan.

In May, 20 15, the cosmological N-body numerical simulation of neutrinos and 3 trillion particles of dark matter was successfully carried out on Tianhe-2, revealing the long evolution process of BIGBANG from 16 million years to now.

At the same time, this is also the N-body numerical simulation with the largest number of particles in the world so far. 165438+1October16, the list of the world's top 500 supercomputers was announced in the United States, and the "Tianhe II" supercomputer won the sixth consecutive supercomputer with 3.386 trillion times per second.

On June 20th, 20 16, a new issue of the list of the world's top 500 supercomputers was announced, and China's self-made chip "Shenwei Light of Taihu Lake" replaced "Tianhe No.2" and topped the list.

2018165438+10/2, the new list of the top 500 global supercomputers was released in Dallas, USA, and the Chinese supercomputer "Tianhe II" ranked fourth.

4. Mozi quantum communication satellite

On 20 1 1 year, the Chinese academy of sciences officially launched the research and development of the world's first "experimental satellite for quantum science", which not only means that China scientists take the lead in challenging satellite-ground quantum communication, but also means that China will gain global coverage of quantum communication before Europe and America.

The world's first quantum science experimental satellite launched by China was officially named "Mozi". Academician Pan Jianwei, chief scientist of quantum satellite, said that Mozi first proposed that light travels in a straight line.

The pinhole imaging experiment is designed, which lays the foundation for optical communication and quantum communication. Naming a quantum satellite after a great scientist in ancient China will enhance our cultural confidence. ?

On August 6th, 2006, 2065438+KLOC-0/40, China successfully launched the world's first quantum science experimental satellite (referred to as "quantum satellite") by the Long March II carrier rocket at Jiuquan Satellite Launch Center.

5. Snow Dragon Polar Research Ship

China's third-generation polar icebreaker and scientific research vessel "Longxue" was built by Ukrainian Hellson Shipyard on March 25th, 1993. It is a Vitus Bering class icebreaker.

China was imported from Ukraine on 1993, and was modified according to the needs of China. "Snow Dragon" is the largest polar research ship in China and the only one in China that can break the ice in the polar regions.

Snow Dragon Boat is cold-resistant, and can continuously break through the ice layer with a thickness of 1.2m (including 0.2m snow) at a speed of 1.5 knots. 1994 10 carried out the first Antarctic expedition and material supply and transportation, and the "Snow Dragon" has made 3/kloc-0 trips to the Antarctic.

By July of 20 14, he had made six scientific expeditions and replenishment transportation missions to the Arctic, covering five oceans, setting a number of new records in China's maritime history.

On March 1 1 March, 2065438, China's 34th Antarctic expedition, which was carrying out a comprehensive marine survey mission in amundsen sea and its adjacent waters, went deep into the central waters of the westerlies and the cyclone-affected areas by the polar research ship "Snow Dragon" and obtained the observation data of the full-depth section of the Antarctic circumpolar current core area.

Baidu Encyclopedia-Long March 1 Rocket

Baidu Encyclopedia-Beidou Satellite Navigation Test System

Baidu Encyclopedia-Tianhe II Supercomputer

Baidu Encyclopedia-Mozi Quantum Communication Satellite

Baidu Encyclopedia-Snow Dragon Polar Research Ship