The Study of Electromagnetic Signal Visualization Method Applied to the Whole World

According to the current situation that the existing electromagnetic signal visualization can only be applied in part of the spacial scale of middle or low latitude on earth, this paper built a earth shell space grid model applied to describing the environment of terrestrial space through employing the method of QTM sphere octree subdivision to subdivide the three-dimensional space of earth shell space on account of the earth shell space grid theory. And the paper utilized model to improve the ray casting arithmetic based on GPU as it seeks to reduce the memory of the whole gradient and raise the draw efficiency effectively. Based on the foundation above, the paper implemented the calculation of electromagnetic signal´s form, field intensity and visualization by approaching the circular cone to signal beam and applying the certain propagation forecasting methods, which has the practical application value.