【摘要】 基于射线追踪的思想提出了用于微波辐射模拟的亮温追踪方法,并根据微波辐射的物理过程,建立了三维场景微波辐射图像的生成模型。针对室外环境分析了目标和背景的辐射模型,同时考虑了多次散射过程,分析了亮温的天空照射、路径衰减以及辐射计响应等关键因素,最后通过虚拟场景和实地场景的模拟对模型进行了验证。更多还原

【Abstract】 A new method of brightness temperature tracing was introduced to the simulation of microwave radiometric image.Some general requirements and considerations for simulation of land targets in outdoor circumstance were analyzed such as sky radiation,path attenuation,temperature transmission,and system response,at last a microwave imaging model for 3-D scene was established,which can be used to create more realistic imagery and reproduce the actual radiation phenomenology.Furthermore,a virtual scene was simulated by this model to show some microwave radiometric phenomenology,and a real scene of airstrip was simulated by this model for validation.The comparisons between the model outputs and field measurements indicate that this model is completely feasible in practice.更多还原