China has for the first time used its own satellite to measure the global gravity field

2022-07-27 0 By

The Sun Yat-sen University tianqin 1 satellite has obtained global gravity field data, which is the first time that China has measured the global gravity field using a domestically developed satellite, luo Jun, chief scientist of China’s tianqin Space Gravitational wave exploration program and academician of the Chinese Academy of Sciences, said in an interview.The technology had been monopolized by the United States and Germany, and Tianqin-1 makes China the third country in the world capable of independently detecting the global gravity field.Luo Jun says: “‘ tianqin 1 ‘satellite is not specific gravity satellite, it is the purpose of the space key technical validation gravitational wave detection, but because’ tianqin plan technology integration requires several breakthroughs to complete, so synchronous implementation of frontier in the field of science and technology breakthrough, the earth gravity field detection is one of them.”According to Luo, Tianqin-1 conducted an application test of the Earth’s gravity field for about 30 hours on August 7, 2020.During this period, the global Navigation Satellite System (GNSS) receiver and inertial sensor, the key payload of Tianqin-1, were switched on at the same time, and the satellite’s flight track basically covered the whole world.To obtain data, sun yat-sen university and huazhong university of science and technology “tianqin plan” team repeated analysis and argumentation, 15 terrace won the global gravity field model, the global gravity anomaly distribution grid, high global geoid distribution grid, and recently formed global gravity field data science report, completed the on-orbit test summary assessment.”However, it should be noted that the accuracy of tianqin-1’s gravity field measurement is not high.”Luo said the result is more significant because it has gone through the whole process of data processing technology for inversion of global gravity field by low-orbit satellites, and has laid a solid technical foundation for China’s subsequent gravity satellite program.Sun Heping, an academician at the Chinese Academy of Sciences, confirmed the test results.”This shows that Tianqin-1 has not only completed its original technical verification tasks and exceeded expectations,” Sun said. “In terms of time, it is the first time that China has independently measured the global gravity field. It also means that Tianqin-1 is actually China’s first satellite capable of measuring the global gravity field.”According to introduction, the earth gravity field data is of great strategic significance to the national economy and people’s livelihood. It can serve geodesy, geophysics, oil and gas resource exploration, national defense and security, and help to cope with global climate change, disaster prevention and reduction and other common challenges faced by mankind. It is the basic data with strategic value.Tianqin-1 was officially approved by the China National Space Administration in 2018 and successfully launched from Taiyuan in December 2019.It is the first space gravitational wave detection technology verification satellite officially launched by China. It was completed with the joint support of China National Space Administration, Guangdong Province and the Ministry of Education. Its key payload technology was jointly developed by Sun Yat-sen University and Huazhong University of Science and Technology, and the satellite platform was produced by Aerospace Dongfanghong Satellite Co., LTD.”Tianqin Project” is a space gravitational wave detection plan proposed by Academician Luo Jun in 2014. Its geocentric orbit plan is internationally known as “China’s plan” for space gravitational wave detection and is China’s independent international space gravitational wave detection plan.At present, in the “0123” technology roadmap of “Tianqin Project”, in addition to “Tianqin-1” as “1” completed scientific tasks beyond expectations, and independently measured the global gravity field data for the first time;The Earth-Moon Laser Ranging Project, known as “0”, has also accurately measured the echo signals of five sets of mirrors on the lunar surface in October 2019, making China the third country in the world to have comprehensively measured the reflector on the lunar surface.The “Tianqin Project” and “laying eggs along the way” basic research innovation model has generated a number of science and technology to serve national security and the national economy.In the interview, Luo also revealed that the Tianqin-2 verification satellite project is currently progressing smoothly.Source: Guangming Daily as a whole/Huo Wenrui school reading/Huo Wenrui preliminary review/Zhang Yi Fengbin final review/Zhao Min Statement: without authorization, prohibit reprinting, use of this public account original articles.Reprint please indicate from Hohhot Daily official wechat;This platform reprinted part of the content from the network, involving infringement please contact delete.Advertising hotline: 0471-6564037