Four comments on the brightest star in the night sky

After watching a movie, a series or visiting an exhibition, you write an article about your specific feelings and enlightenment. The following are four comments on "The Brightest Star in the Night Sky" compiled by me, which are for reference only and I hope to help you.

The brightest star in the night sky 1 comments

Students can always hear it? Beidou-1? Beidou 2? Beidou-3? But some students may not understand that they are not a single satellite, but a positioning system composed of many satellites. How are these three positioning systems established? How many people can you serve?

Students must remember last year, right? I'm the heir? The Beidou characteristic course "Chasing Dreams" in the online classroom has made many students interested in Beidou. After class, I consulted the materials and learned a lot about Beidou. In this lesson, three little Beidou fans will tell the students about the construction process of Beidou satellite navigation system from scratch and from existence to strength.

From the successful launch of the first Beidou-1 experimental satellite in 2000 to the completion of the deployment of the last global networking satellite of Beidou-3 on June 23, 2020, over the past 20 years, we have sent four Beidou experimental satellites, 55 Beidou-2 and Beidou-3 networking satellites into space for 44 launches. In the vast universe, can we weave one that won't get lost? Road network? . How many challenges did Beidou people experience from falling behind others to leading the world? Yang Changfeng, chief designer of Beidou satellite navigation system engineering, Ran Chengqi, director of China Satellite Navigation System Management Office and deputy chief designer of Beidou satellite navigation system engineering, will tell us the story of Beidou.

? Do Taishan Beidou people admire it? Beidou people regard work as a sacred cause, and create excellent products with ingenuity, so that China Beidou can constantly set new records and create miracles one after another. People with dreams are always young; Those who are willing to work hard will eventually have an answer! Beidou dreams, the stars shine, and the whole country rejoices. On Beidou's journey of asking for heaven, there are day and night struggles, technical challenges and persistent setbacks. Because of spiritual guidance and dreams, Beidou people have made unremitting efforts to innovate and cleared up one problem after another on Beidou's flying road. On July 3rd, 2020, China announced to the world that the Beidou-3 global satellite navigation system was officially opened. This is an important stroke in the development history of Beidou, and it is also an important milestone for China to climb the peak of science and technology and become a space power. From scratch, from existence to strength, the history of Beidou satellite navigation system construction is the history of struggle from generation to generation. The spirit should be passed on, and the dream should continue. Now, students, Beidou will take you to the world. In the future, you will travel around the world with Beidou.

Comment on The Brightest Star in the Night Sky 2

The basic point of the Chinese nation's struggle is self-reliance, and the only way to climb the world's scientific and technological peak is independent innovation. The successful practice of China Beidou system shows that innovation means development and innovation means the future. Whoever catches the bull's nose of scientific and technological innovation and masters the initiative of independent innovation will take the lead and win the advantage. It's time for us to realize the dream of strengthening the military with the Chinese dream. We must be ambitious, energetic and heroic, accelerate the enhancement of independent innovation ability and strength, strive to achieve independent control of key technologies, and firmly hold the initiative in innovation and development in our own hands.

China Beidou, World Beidou and Beidou are the development concepts that Beidou system has always adhered to and practiced. Beidou system has been widely used in transportation, agriculture and fishery, disaster reduction and relief. This year, Beidou system has played an active role in the prevention and control of epidemic situation and the elevation measurement of Mount Everest. Beidou system is making life smarter and more convenient. In 2035, based on Beidou system, a more ubiquitous, integrated and intelligent integrated positioning, navigation and timing system will be built to better serve the world and benefit mankind, so that the world can share the development achievements of China Beidou.

? The rivers and rivers are vertical and horizontal, and the Beidou is horizontal and straight. ? Chasing the sky, the moon and idolize has always been the unremitting pursuit of China astronauts. This year is the final year of Beidou system construction, and it is also an extremely important year for the development of space industry. Gathering innovative Chinese forces will surely mark a new height of China's space development and realize its dream of building a space power at an early date.

Today, Beidou, consisting of 55 satellites, has surpassed the American GPS with 3/kloc-0 satellites and become the real Beidou? Global positioning system? . When each of us sees Beidou in our mobile phone, hears Beidou and uses Beidou, please remember this young one? Beidou tiantuan? .

Comments on the brightest star in the night sky 3

? Beidou tiantuan? The brightest star in the night sky

? The rivers and rivers are vertical and horizontal, and the Beidou is horizontal and straight. ? In ancient times, there was the Big Dipper, which knew the direction, set the season and told the time. There is a Beidou satellite today, with wide coverage, accurate positioning and accurate navigation. China Beidou serves the world and benefits mankind. What is this? Beidou tiantuan? Light up our vast starry sky.

26 years, 9495 days, 820 million seconds, Beidou Sky Mission? Perseverance and dedication to youth. Rome was not built in a day. Beidou-1 system 1994 was established in 2000 and perfected in 2003.

Beidou-2 system was started in 2004 and completed in 20 12;

The Beidou-3 system covering the whole world will be completed in 2020. Beidou navigation system is from scratch, from existence to Excellence, from weakness to strength, which is inseparable from the silent efforts of generations of astronauts. So far? Beidou tiantuan? * * * More than 300,000 people, Academician Sun Jiadong, who led the team to complete the construction tasks of Beidou-1 and Beidou-2, opposed the reference to GPS and argued for it. Start a new stove? Yang Changfeng, academician Xu Qifeng and chief designer of Beidou satellite navigation system, presided over Yang Yuanxi to complete China National Geodetic Control Network and corresponding coordinate system and study satellite navigation and positioning technology? Goddess Beidou? Xu ying? They have changed over the years. Sunset snow? Perseverance, serving the country, full of blood, selfless work, bravely climbing the peak, dreaming of the stars.

Digital signal, chip, atomic clock, Beidou sky group? Independent innovation, overcoming difficulties. Practice has repeatedly told us that key core technologies cannot be bought, bought or talked about. 1995, for the signal? Catch sperm and follow? Question, Yong and Ou Gang, three boys in their twenties, take them out? All digital? Scheme, relying on only 40 thousand yuan, the warehouse is less than 10 square meter, borrowed instruments and equipment, after three years of suffering, completed the simulation experiment, broke through the core technology, completed? Double star? Locate Beidou-1 system. Coincidentally, in the face of signal interference, Beidou-2 overcame many key technologies, such as the overall technology of navigation satellite and high-precision on-board atomic clock, while Beidou-3 realized the integrated system of devices and components, enabling Beidou to be installed. China Core? , the first one? Three kinds of orbits? Construction of mixed constellation project. In just 20 years, China has broken through the achievements of other global satellite navigation systems for more than 40 years, and researchers have made progress in every core technology? Loushanguan? , tear? Lacu? They traveled a long way, went through all the hardships, crossed the river by feeling the stones, and worked hard to innovate one step at a time.

Service availability is higher than 99%. Beidou tiantuan? Pursuing Excellence and Excellence. Details determine success or failure. Beidou-3 satellite can work for 10 to 12 years;

The actual evaluation of global fixed-point navigation accuracy is 2~3 meters, and the speed measurement accuracy is better than 0.2 meters per second;

The daily clock error is less than 0.5 nanosecond, and the accumulated error of 6 million years is 1 second. All the indicators are more optimized than the initial published target data, and are also in the forefront compared with navigation systems in other countries. As the fourth largest global satellite navigation system in the world, Beidou-3 is world-class in navigation accuracy, timing accuracy, stability and reliability? Beidou+? Is accelerating towards us. The stage is as big as a dream. Astronauts have high standards and strict requirements, and do every job to the extreme and become? Professional, precise and sharp? The more an expert encounters resistance, the more he displays his skills, the more he faces challenges, the more he studies hard and the more he understands? Made in China? China Zhizao? China created it? Gradually change.

? Beidou tiantuan? Just like the brightest star in the night sky, it shows us the way forward. party member cadres should learn from them? Independent innovation, unity and cooperation, overcoming difficulties and pursuing Excellence? Spirit, contribute to the great rejuvenation of the Chinese nation.

Comments on the brightest star in the night sky 4

The development of science and technology brings us surprises and admiration again and again. Due to the development of science and technology, Edison invented the electric light by using electricity, which made us bid farewell to the era of lighting with kerosene lamps. Whenever night falls, every household has bright lights on, which brings convenience to our work and study.

Due to the development of science and technology, people invented seeders and harvesters. It brings great convenience to the sowing and harvesting of farmers' uncles, and also saves them time and effort. Due to the development of science and technology, people invented refrigerators, televisions, air conditioners and washing machines. The refrigerator is convenient for us to refrigerate and freeze food; Television keeps us abreast of major events at home and abroad, and also adds luster to our life and entertainment; Air conditioning brings us coolness or warmth in hot summer and cold season; The washing machine brings convenience to mother's washing clothes. Due to the development of science and technology, people invented walkie-talkies, mobile phones and videophones, which facilitated the communication and contact with each other, as if the other party was by your side. Due to the development of science and technology, people invented computers.

We can look up information and write articles on the computer, and we can also participate in online shopping and online chatting, and children can play games. The computer is our right-hand man. It has brought great help and convenience to our life, work and study, at the same time, it has also increased our knowledge, broadened our horizons and cultivated our sentiment. Due to the development of science and technology, our architects give full play to their intelligence, design and build beautiful and strange high-rise buildings, which rise from the ground and stand in disorder in the north and south of the river. Due to the development of science and technology, our aviation and aerospace industry has made great breakthroughs and successes. The J- 10 fighter seen in the National Day military parade is the most advanced fighter developed in China. I think that with such advanced combat weapons, our national defense will be stronger and more stable. With these advanced weapons, we will no longer be bullied.

In addition, Shenzhou 5, Shenzhou VI and Shenzhou VII were launched one after another, and the number of people carrying them ranged from one to three, from activities inside the cabin to activities outside the cabin. All these prove that China is capable of exploring and conquering space and that China is capable of building a space station. Maybe the pace of building a space station is not far away. I believe that in the near future, China's space industry will definitely surpass that of the United States, Russian and other developed countries.

The development of science and technology has brought great changes to all walks of life. I think, as a student and a future member of the motherland, I must study hard, learn more knowledge and enrich myself. When I grow up, I will use my knowledge and skills to build and create, and make our country stronger and more beautiful!