1)Department of Surveying and Geoinformatics,Tongji University, Shanghai 200092;2)Departments of Surveying and Mapping, Guangdong University of Technology, Guangzhou 510006
Abstract The ordinary matrix operation algorithms are difficult to meet the needs of high degree gravity field recovery. In order to improve computational efficiency, this article applied OpenMP parallel computing libraries and MKL scientific computing libraries to high degree earth’s gravity field recovery, which significantly improved the computational efficiency. Simulation results are as follows. 1)When making up of sub normal equation coefficient matrix with a single epoch as the solver unit, OpenMP algorithm can store normal equation coefficient matrix under the compressed triangle and OpenMP algorithm’s overhead of memory and time are relatively acceptable.2)When the author makes up of the high dimension’s coefficient matrix with more than one epoch, and then forms the normal equation,MKL algorithm can make an efficient performance.3)The efficiency of MKL inversion algorithm is much higher than OpenMP algorithm.4)Utilization of the advantages of OpenMP and MKL algorithms can significantly improve the efficiency of high degree earth’s gravity field recovery.
