月球重力场模型研究进展及展望

第一，整理了自人类开始探月以来所有和月球重力相关的探测卫星，以及自学者开始研究月球重力场以来所有重要的月球重力场模型。第二，根据探月跟踪模式的发展过程，详细介绍了各阶段跟踪模式的原理，并以示意图的形式展现，同时列举了各阶段跟踪模式下的重力场模型。第三，对月球重力场反演方法进行了介绍，主要包括短弧积分法和天体力学法。第四，对各个探月阶段具有代表性的重力场模型进行介绍，主要包括：8×4重力场模型、Lun60D、LP165P、SGM100i和GL0420，并进行了精度对比，发现最新一代模型精度比之前提高了4个数量级。第五，介绍了本团队在月球重力探索方向研究进展。第六，介绍了月球重力场模型在探究月球内部构造和卫星定轨方面的应用，并结合现代技术以及目前重力场反演的不足，提出以后可以改进的方案：应用重力梯度仪和获取月球表面真实重力数据。

Research Progress and Future Prospect of Lunar Gravity Field Model

Firstly, all the exploration satellites related to the lunar gravity since the beginning of human exploration are summarized, and all the lunar gravity field models since scholars began to study the lunar gravity field are presented. Secondly, according to the development process of lunar exploration tracking mode, the principle of each phase tracking mode is introduced in detail and presented in the form of schematic diagram. The gravity field model of each phase tracking mode is enumerated at the same time. Thirdly, the recovery methods of the lunar gravity field are introduced, including the short arc integral method and the celestial mechanics method. Fourthly, the representative gravity field models in each stage, mainly including the first 8×4 gravity field model, Lun60D, LP165P, SGM100i and GL0420, are listed for introduction and the accuracy comparison is made. It is found that the accuracy of the latest generation model is four orders of magnitude higher than that of the previous model. Fifthly, the research progress model of our team in the direction of lunar gravity exploration was introduced. Finally, the application of the lunar gravity field model in exploring lunar interior structure and satellite orbit determination is introduced. Then, combining with the modern technology and the shortcomings of current gravity field recovery, the improved scheme in the future is proposed: applying gravity gradiometer and obtaining the real gravity data of the lunar surface.