重力场理论及其应用
　 Theory and application for gravity field

  地球重力场是地球内部和近地空间物质密度分布和空间位置的综合反映，是研究地球内部结构及其运动的重要物理量。重力场所包含的信息十分丰富且重力资料具有范围广、精度和分辨率高、观测成本相对较低廉等优势也就决定了重力场具有广泛的应用。目前重力场已经广泛应用于地球内部结构研究、矿产资源勘探、地震活动性研究、水资源分布变化以及国防军事等领域之中，为人类带来了巨大的社会和经济效益。同时由于重力场的复杂性也引出了许多期待解决的科学问题。针对地球内部结构及地球动力学前沿领域，以及国防建设、资源开发利用和灾害监测的迫切需求，重点研究全球和中国大陆重力场时空变化及其规律与机制；发展我国自主重力卫星观测系统；研制适合导弹部队战场需求的小型绝对重力仪；研究远程武器发射场的重力保障技术和潜艇水下无源重力匹配导航技术;开展大地构造、地壳结构以及深部隐伏矿产资源勘探。主要研究内容：

从事重力场理论、技术与方法及在国防和国民经济中的应用。包括地球重力场和大地水准面的确定、卫星测高、岛礁重力测量、重力场时空变化，绝对重力测量、重力辅助导航系统、重力/惯导组合技术的理论方法和技术、重力场的分离与反演及其在地球内部结构研究和矿产资源勘探中的应用等。

The earth's gravity field, an important physical quantity to research the earth's inner structure and movement, is the integrated reflection of inner and upper matter's density distribution and spatial position of the earth. Gravity data have the advantage of wide range, high precision and resolution and relative cheap observation cost, so that the gravity field which contains abundant information has broad applications. Presently, the gravity field which has widely applied in research of inner structure of the earth and seismic activity, mine resource exploration, change of water resource distribution, national defense and military field, brings enormous social and economic benefits for human. At the same time, it brings many scientific problems to resolved because of the complexity the of the gravity field. We focus on the space-time changes, laws and mechanisms of the gravity field of china and globe, aiming at frontier fields of geodynamics and inner structure of the earth, and urgent needs of national defense and construction, resource exploration, and disasters monitor. Developing national independent gravity satellite observation systems and mini-instruments for absolute gravity measurements that adapt to battlefield needs for missile units. Researching gravity security technology of launch site for long-range weapons and underwater initiative gravity matching navigation techniques of nuke. Developing geotectology, crustal structure, and deep hidden mine resource exploration. Primary research content as:

Gravity field theory, technique and method, and application in national defense and economy. Including gravity field and geoid confirmation, satellite altimetry, island reef gravity survey, space-time variation of gravity field, absolute gravity measurements, gravity aided inertial navigation system, theory and technology of gravity/inertial navigation integrated technology, separation and inversion of gravity field and its application in the study on interior structure of the earth and mine resource exploration.