基于模型GRGM660PRIM的月球重力场特征研究  

Study of the characteristics of lunar gravity field based on the model GRGM660PRIM

作　　者：方圆[1,2] 孟小红[1,2] 王俊[1,2] 陈召曦[1,2] FANG Yuan;MENG Xiao-hong;WANG Jun;CHEN Zhao-xi(Key Laboratory of Geo-detection (China University of Geosciences,Beijing),Ministry of Education,Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences (Beijing),Beijing 100083,China)

机构地区：[1]地下信息探测技术与仪器教育部重点实验室(中国地质大学,北京),北京100083 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《地球物理学进展》2018年第6期2211-2218,共8页Progress in Geophysics

基　　金：国家重点研发计划重点专项(2016YFC0303000)和重点研发计划子课题(2016YFC06011023)联合资助

摘　　要：目前,对月球的研究是空间科学的热点之一,应用重力场特征分析月球内部的结构构造是一种基本且重要的研究手段.在Gravity Recovery and Interior Laboratory(GRAIL)任务之前,月球重力场模型是由Lunar Prospector(LP)任务和SELENE任务的数据解算出的,LP任务缺少月球背面的跟踪数据,SELENE任务虽测量了月球背面的数据但对改善重力场精度和分辨率的能力有限.GRAIL任务采用卫-卫跟踪模式,测得了全月球上均匀分布的Ka(电磁频谱微波波段的一部分)波段数据.因此,由GRAIL任务解算出的660阶次重力场模型GRGM660PRIM精度与分辨率较以往有很大提高,基于该模型进行研究能够较详细地了解月球重力场特征,这可以为接下来对月球的研究提供较为可靠的重力学证据.本文利用月球重力场模型GRGM660PRIM数据与嫦娥一号月球地形数据,采用重力勘探的数据处理方法,基于月球表面计算出了月表空间重力异常与布格重力异常.通过对月表空间重力异常场和布格重力异常场研究,揭示了月表各种异常与质量瘤的异常特点,同时也掌握了各种异常与地形之间的相关性.At present,the study of the Moon is one of the hottest topics in space science,and using gravity field to analyze the internal structure of the moon is a basic and important research method.Before the Gravity Recovery and Interior Laboratory (GRAIL)mission,the lunar gravity fieId models were solved by data of the Lunar Prospector (LP)mission and the SELENE mission.The LP mission lacked the tracking data of the lunar farside.Although the SELENE mission measured the lunar farside, the capacity is limited to improve the precision and resolution of the lunar gravity field.The GRAIL mission has used the technology of satellite to satellite tracking to measure evenly distributed Ka-band (a part of the electromagnetic spectrum microwave band)data on the entire Moon.Therefore,the precision and resolution of the degree 660 lunar gravity field model GRGM660PRIM,which is solved from the GRAIL mission,is greatly improved.Based on this model,the research can understand the characteristics of lunar gravity field in detail,and in this way,there are more reliable gravity evidence for lunar research.In this paper,adopting the data processing method of gravity exploration,authors uses the data of lunar gravity field model GRGM660PRIM and the lunar terrain of Chang'E-1 to calculate the free air gravity anomaly and the Bouguer gravity anomaly on the lunar surface.Through the study of air free gravity anomaly and the Bougucr gravity anomaly on the lunar surface,authors reveal the characteristics of lunar various gravity anomalies and mascons,and master the correlation between the lunar various gravity anomalies and lunar terrain.

关 键 词：月球重力场模型 月球地形 空间重力异常 布格重力异常 

分 类 号：P184[天文地球—天文学] P312