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地球重力模型及中国大陆重力场的计算
引用本文:许惠平,刘万崧,Haagmans R H N. 地球重力模型及中国大陆重力场的计算[J]. 吉林大学学报(地球科学版), 2001, 31(1): 84-88
作者姓名:许惠平  刘万崧  Haagmans R H N
作者单位:1. 吉林大学 地学信息系统研究所,吉林 长春 130026
2. Faculty of Civil Engineer ing and Geosciences, Delft University of Technology, Delft, 2629JA, The Net herlands
基金项目:高等学校博士学科点专项科研项目;1999018704;
摘    要:融多颗卫星数据、地面重力值和其它资料一起的地球重力模型EGM 96 ,为研究中国大陆的重力场及相关问题提供了一个高精度 36 0阶的球谐系数。在分析EGM 96的基础上 ,计算并简单解释了中国大陆的自由空气异常和布格重力异常。计算所得重力场的精度和分辨率大大高于常用的1∶140 0 0 0 0 0自由空气异常图及布格重力图

关 键 词:地球重力模型  自由空气异常  布格重力异常
文章编号:1008-0058(2001)01-0084-05
修稿时间:2000-03-20

THE EGM96 AND ITS CHINA GRAVITY CALCULATION
XU Hui_ping ,Haagmans R H N ,Bruijne A J T de ,LIU Wan_song. THE EGM96 AND ITS CHINA GRAVITY CALCULATION[J]. Journal of Jilin Unviersity:Earth Science Edition, 2001, 31(1): 84-88
Authors:XU Hui_ping   Haagmans R H N   Bruijne A J T de   LIU Wan_song
Affiliation:XU Hui_ping 1,Haagmans R H N 2,Bruijne A J T de 2,LIU Wan_song 1
Abstract:EGM96, which was mainly developed by NASA, NIMA and the OhioState University, i s a degree up to 360 spherical harmonic cofficients of earth’s gravitational po t ential model. This high accurate model was calculated from satellites data, whic h include altimetry data, tracking data, and so on. GPS data, 30′×30′ surfac e gra vity data, etc. The major advancements in EGM96 were the incorporation of all da ta into 360×360 geopotential solution, improved model accuracy, offered some i mp ortant by-products and a new calculation method for the high-degree solutions. I n this paper, we firstly introduced the earth gravity model-EGM96, then calculat ed and interpreted the free-air gravity anomaly of mainland of China using EGM96 . In addition, the digital topographic data was used to obtain Bouguer gravity a nomaly in the same area. The geological explain was made in the paper.
Keywords:earth gravity model(EGM)  free-air gravity anomaly  Bouguer gravity anomaly  
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