[ China Instrument Network Instrument Research and Development ] Recently, the China Institute of Metrology (referred to as "China Metrology Institute") relying on the national measurement-based standard resource sharing service platform to carry out the "gravity comparison special service" project successfully passed the acceptance in Mohe City, Heilongjiang Province. The project was jointly undertaken by the China Metrology Institute and the Heilongjiang Metrological Testing and Testing Institute. An absolute gravity reference point was established in the Arctic Village of Mohe City through exploration and site selection, infrastructure construction, and observation and testing. The absolute gravity reference point is not only the northernmost point in China, but also the first point from the Chinese Metrology Institute from its “Global Absolute Gravity Key Comparison Point”, which has special significance.

Acceptance meeting site
Guo Jie, deputy director of the Quality Supervision Bureau of Heilongjiang Province, Song Shuying, vice president of China Metrology Institute, Chang Bin, deputy mayor of Mohe City, and Cao Shuguang, dean of the Heilongjiang Provincial Metrology and Testing Institute attended the project acceptance meeting. Shen Chongyang, director of the Gravity Laboratory of the Seismological Bureau of Hubei Province, Chen Le, professor of China Metrology University, Tao Xuerong, researcher of China Special Equipment Inspection Institute, and Wang Yuewei, executive director of China Equipment Supervision Association, and other experts listened to Wu Shuqing, deputy researcher of China Institute of Metrology Institute of Vibration Gravity A detailed report on the project, through field visits and inquiries, agreed to pass the acceptance.
The magnitude of gravity acceleration is a physical quantity closely related to geographical location. Mohe City, Heilongjiang Province has the highest latitude, and has a larger gravity acceleration value than other parts of China. The establishment of the absolute gravity reference point not only helps to improve the calibration level of local pressure, force, torque, scales and other mechanical instruments and sensors, but also fully exploits the geographical advantages of the region, and forms other absolute gravity reference points in China. The natural wide-ranging change of gravity long baseline provides a technical basis for the calibration of various gravity measuring instruments. At the same time, the project also carried out gravity measurement data sharing services in earthquake, surveying and mapping, geology and other industries, both scientific and practical.
(Original title: China Metrology Institute "Gravity Comparison Special Service" project passed the acceptance test in Mohe)

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