临近空间高速运动目标的紫外散射辐射光谱特性研究

项目名称： 临近空间高速运动目标的紫外散射辐射光谱特性研究

项目编号： No.61475123

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 白璐

作者单位： 西安电子科技大学

项目金额： 80万元

中文摘要： 针对高速运动目标探测预警的迫切需求，本项目拟基于高速运动目标气动加热产生的激波层温度场分布，利用光的散射及辐射理论，建立目标的紫外光谱散射辐射模型；结合临近空间的物理环境特性，利用辐射输运理论，研究紫外羽烟的辐射传输特性；围绕激波层特征及空气组分特征与高速飞行目标运动特征之间的相关性，进行高运动速度与紫外辐射光谱特性之间的相关性分析；建立针对天基探测的临近空间中高速运动目标的紫外光谱散射辐射亮度的复合模型，结合临近空间环境背景的紫外辐射散射特性，为最佳探测波段、方位的选取提供理论依据。探索强耦合、非线性对高速运动目标紫外辐射亮度的影响。以上研究将对针对天基观测的临近空间中高速运动目标的预警探测与识别提供理论依据，同时也为我国临近空间飞行器的研发、设计等相关研究提供技术支撑。

中文关键词： 临近空间；目标特性建模；紫外辐射；高速

英文摘要： With the urgent need for target detection and early warning of high speed target in near space, this project aims to study the physical interaction relationship with high speed target and electromagnetic waves. Based on the temperature model of shock layer，the theory of light scattering and radiation, and the theory of radiative transfer we want to find new optical methods and new theories in the field of detection and recognition a target in the near space environment. In this project, we want to study the following questions. Based on the scattering and radiation BRDF spectrum modeling of some typical sample, the composite model of target in UV band will be establish. Based on the plume flow field data in the reference, the main parameters such as the temperature field could be obtained. Combined with the feature of band absorption and scattering phase function, ultraviolet plume radiative transfer model could be established. Both surrounding particles in the atmosphere in the near space and other ultraviolet radiation characteristics of environment will be considered. And the relationship with the shock layer models between velocity and the ultraviolet radiation characteristics will be constructed. Researches about up ward path for space-based observation's ultraviolet radiation and scattering transmission characteristics model will be establish for high speed target detection and early warning in near space. Combining with the physical properties of the near space atmosphere, calculations of high speed target and shock layer of ultraviolet radiation will be analyzed. And the signal-to-noise ratio of the UV radiation with background will be calculated. This kind of researches will provide the basis for the selection of better detection wavelength or azimuth position in the UV band. The effect on strong coupling, nonlinear effect will be explored in the above researches. If this application will be approved, more researches will be deliberated for space-based observation of high speed moving target. And this kind of researches will provide theory basis for early warning, detection and identification of high speed target in near space in the UV band and at the same time it could provide theory basis for us to develop high speed target in near space for ourselives.

英文关键词： near space;target model;UV radiation;high speed