大地测量与地球动力学2011，Vol.31Issue(6)：140-144,5.
海量卫星重力梯度观测数据确定地球重力位模型的数值方法
ON NUMERICAL METHODS FOR DETERMINATION OF EARTH GRAVITY FIELD MODEL USING MASS SATELLITE GRAVITY GRADIOMETRY DATA
摘要
Abstract
On the basis of Space-Wise Least Square method, three numerical methods including Cholesky decomposition, Pre-conditioned conjugate gradient and Open Multi-Processing parallel algorithm are applied into the determination of gravity field with satellite gravity gradiometry data. The results show that, Cholesky decomposition method has been unable to meet the requirements of computation efficiency when the computer hardware is limited. Pre-conditioned conjugate gradient method can improve the computation efficiency of huge matrix inversion, but it also brings a certain loss of accuracy. The application of Open Multi-Processing parallel algorithm could achieve a good compromise between accuracy and computation efficiency.关键词
卫星重力梯度/Cholesky分解/预条件共轭梯度/OpenMP并行算法/数据处理Key words
satellite gravity gradiometry/ Cholesky decomposition/ pre-conditioned conjugate gradient/ open multiprocessing parallel algorithm/data processing分类
天文与地球科学引用本文复制引用
朱广彬,常晓涛,邹贤才,徐新禹,王建强..海量卫星重力梯度观测数据确定地球重力位模型的数值方法[J].大地测量与地球动力学,2011,31(6):140-144,5.基金项目
国家自然科学基金(40874012,40904003,40974016,41004007) （40874012,40904003,40974016,41004007）
