Research of Parallel Data Processing for GNSS Network Adjustment under Multicore Environment
Cui Yan · Acta Geodaetica et Cartographica Sinica · 2013
The study is concentrated on the parallel algorithm for computationally intensive tasks of the current data processing for GNSS network adjustment with multiple time periods or many stations under multi-core environment.The hot spot calculated tasks which data processing for GNSS network adjustment deals with are analyzed and numerical calculation parallel method for matrix multiplication and matrix decomposition based on modular matrix theory are proposed.Subsequently,the computational efficiencies of single-core and multi-core environment are compared.The Parallel Extensions under NET4.0 framework is adopted and the validity of the multi-core concurrent design is demonstrated by some examples.The experimental results show that the multi-core parallel computing of large scale data processing for GNSS network adjustment can give full play to the advantage of the multi-core system performance and greatly improve the efficiency of GNSS data processing and the resource utilization.