地球上的重力加速度值，是一个随时间、地点、高度而变化的物理量、它在计量学、物理学、地球物理学和地球动力学的科学研究中受到广泛的重视。在计量学中，重力加速度直接影响力值和一切包含力值的物理量测量，因此国际计量局从19世纪至今，一直重视并致力于提高测量重力加速 The value of gravitational acceleration on Earth is a physical quantity that varies with time, place and altitude. It is widely valued in the scientific research of metrology, physics, geophysics and geodynamics. In metrology, the direct impact of gravity acceleration and physical value of all inclusive values ​​measured, so the International Bureau of Metrology from the 19th century to date, has always attached importance to and is committed to improving the measurement of gravity acceleration