摘要
利用超高阶次重力场模型EGM2008模拟了一段轨道重力场,利用分段多项式拟合方法逼近轨道重力场。通过模拟实验给出了不同分段方法以及不同次数的多项式拟合的精度、数据存储量和计算速度。结果表明:利用分段多项式拟合逼近轨道重力场的计算速度比传统方法提高了3个数量级,数据存储量少于100个浮点数。
An orbit gravity field was simulated through the EGM2008 with ultrahighdegree, ann men m gravity field was approximated by polynomial fitting with divided segmentation of the orbit. According to the differ ent segmentations and polynomial fittings, a test was done which focuses on the precision, data storage and calcula tion speed of the polynomial fitting. The results show that: comparing with traditional methods, the computing speed of the orbit gravity field by the segmentation polynomial fitting approximation improves 3 orders of magnitude, and data storage is less than 100 floating point numbers.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第4期52-55,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41074014
41161069
41204003)
江西省教育厅青年基金(GJJ12394)
东华理工大学博士科研启动基金(DHBK201114)
地球空间环境与大地测量教育部重点实验室开放基金(11-01-01)
江西省教育厅科研规划重点项目(GJJ10022)
江西省自然科学基金(2010GZC0008
2010GZC0009)
关键词
扰动引力
多项式拟合
分段
速度
轨道重力场
disturbing gravity
polynomial fitting
divided segmentation
speed
orbit gravity field