Development and applications of gravimetry and satellite-borne gravimetry are reviewed. Relations among the rectangle coordinates, Keplerian elements, Hillian elements and Equinoctial elements to describe the motion of low earth orbit satellite are given.

• 回顾了重力测量和卫星重力探测技术的发展和应用，阐述了描述低轨卫星状态的直角坐标、Kepler根数、Hill根数和Equinoctial根数之间的相互关系，认为Hill根数和Equinoctial根数能够避免由卫星轨道奇异带来的计算问题，分析了低轨卫星的受摄运动，给出了摄动模型。