Development Of 0-400km Space Radiation Virtual Environment Generate And Display Software

The virtual test can effectively reduce the losses of the human and material resources and drastically cut down the costs of test and development.For the reason that virtual test is able to generate any test environment,the virtual test which has the ability to test products under complex conditions can realize the comprehensive investigation for tested products.As an important part of test resources that can support the virtual test,the perfection and credibility of virtual natural environment directly influence the fidelity of virtual test.It has important theoretical significance as well as far-reaching value for perfecting the virtual test and verification platform to development 0-400 km space radiation virtual environment generate and display software.To generate the data of 0-400 km space radiation virtual environment,the method of constructing spatial radiation environment was researched.First of all,two major radiation types of the 0-400 km space radiation environment,the galactic cosmic rays and the solar cosmic rays,were identified according to the detailed analysis of the 0-400 km space radiation environment.Then,a 0-400 km spatial radiation modeling scheme was designed based on the source of spatial radiation.The scheme was that establishing a 0-400 km space cosmic ray model based on the ACE satellite observation data,calculating the geomagnetic cut-off stiffness based on the IGRF geomagnetic field model,calculating the density of atmospheric and nuclear which from the NRLMSISE-00 standard atmospheric model,and finally,the 0-400 km space radiation environment model was modified in accordance with the effect of geomagnetic cut-off stiffness as well as atmosphere and nuclide density on the energy spectrum of the original cosmic ray obtained by monte carlo simulation.In order to complete the reliability evaluation of the space radiation environment model,the verification results are presented from two aspects: model comparison verification and data accuracy verification.At last,the 0-400 km spatial radiation environmental data were standardized and stored based on the SEDRIS for the purpose of establishing standardized environmental data.In order to facilitate data generation,the 0-400 km space radiation virtual environment generation software was developed according to the spatial radiation environment construction method.In order to make users understand the virtual environment of space radiation directly and analyze it conveniently,the display and processing method of data of space radiation environment was studied.The visualization tools commonly used at the present stage were investigated and their respective characteristics and applicability were analyzed.Finally,we selected Chart Director as the visualization tool for spatial radiation environment data in combination with the needs of the project,and developed the 2-D display software for the 0-400 km space radiation virtual environment.A detailed functional test was carried out for the developed software,which showed that all software functions were normal and the generated data met the requirements of the design technical indicators.Finally,the joint debugging and software application verification were performed based on the H-JTP and the virtual test and comprehensive verification technology platform developed by a research group.And the verification results were in line with expectations and could meet actual needs.