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
EGM96, which was mainly developed by NASA, NIMA and the Ohio State University, is a degree up to 360 spherical harmonic cofficients of earth’s gravitational potential model. This high accurate model was calculated from satellites data, which include altimetry data, tracking data, and so on. GPS data, 30′×30′ surface gravity data, etc. The major advancements in EGM96 were the incorporation of all data into 360×360 geopotential solution, improved model accuracy, offered some important by-products and a new calculation method for the high-degree solutions. In this paper, we firstly introduced the earth gravity model-EGM96, then calculated 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 anomaly in the same area. The geological explain was made in the paper.
出处
《长春科技大学学报》
CAS
CSCD
北大核心
2001年第1期84-88,共5页
Journal of Changchun University of Science and Technology
基金
教育部博士点基金资助项目! ( 19990 1870 4)
原长春科技大学创新人才基金资助项目