Based on analyzing the storage structure of polarimetric interferometry synthetic aperture radar(Pol-InSAR)data,this study proposed a multi-core parallel Pol-InSAR data processing method(MCP-PIDPM).In order to improve...Based on analyzing the storage structure of polarimetric interferometry synthetic aperture radar(Pol-InSAR)data,this study proposed a multi-core parallel Pol-InSAR data processing method(MCP-PIDPM).In order to improve the processing speed of Pol-InSAR data,this paper presented a multi-core parallel Pol-InSAR data processing scheme,and constructed its processing framework in the research.The key technology of the multi-core parallel Pol-InSAR data processing was discussed,a buffer detection splitting method for Pol-InSAR image was proposed,and improved the self-adaptive phase unwrapping method.At last,a multi-core parallel Pol-InSAR data processing system(MCP-PIDPS)was developed,and the proposed MCP-PIDPM method was tested and validated through experiments.The system based on the above method assigns tasks and loads reasonably to each processor and uses space to exchange time.It is proved by numerical experiments that the efficiency of Pol-InSAR data processing is increased by more than 10 times.The research breaks through the bottleneck which restricts the efficient application of Pol-InSAR,and provides a feasible solution for the efficient processing of Pol-InSAR data.展开更多
On the basis of Space-Wise Least Square method, three numerical methods including Cholesky de- composition, pre-conditioned conjugate gradient and Open Multi-Processing parallel algorithm are applied into the determin...On the basis of Space-Wise Least Square method, three numerical methods including Cholesky de- composition, 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 de- composition 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 precision. The application of Open Multi-Processing parallel algorithm could achieve a good compromise between accuracy and computation efficiency.展开更多
基金supported by the National Natural Science Foundation of China(No.42471508)Natural Science Foundation of Shandong Province(ZR2025MS537).
摘要Based on analyzing the storage structure of polarimetric interferometry synthetic aperture radar(Pol-InSAR)data,this study proposed a multi-core parallel Pol-InSAR data processing method(MCP-PIDPM).In order to improve the processing speed of Pol-InSAR data,this paper presented a multi-core parallel Pol-InSAR data processing scheme,and constructed its processing framework in the research.The key technology of the multi-core parallel Pol-InSAR data processing was discussed,a buffer detection splitting method for Pol-InSAR image was proposed,and improved the self-adaptive phase unwrapping method.At last,a multi-core parallel Pol-InSAR data processing system(MCP-PIDPS)was developed,and the proposed MCP-PIDPM method was tested and validated through experiments.The system based on the above method assigns tasks and loads reasonably to each processor and uses space to exchange time.It is proved by numerical experiments that the efficiency of Pol-InSAR data processing is increased by more than 10 times.The research breaks through the bottleneck which restricts the efficient application of Pol-InSAR,and provides a feasible solution for the efficient processing of Pol-InSAR data.
基金supproted by the National Natural Science Foundation of China(40874012,40904003,40974016,41004007)
摘要On the basis of Space-Wise Least Square method, three numerical methods including Cholesky de- composition, 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 de- composition 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 precision. The application of Open Multi-Processing parallel algorithm could achieve a good compromise between accuracy and computation efficiency.