氧气A(O,O)波段气辉体发射率和临边辐射强度模拟与分析

Simulation and Analysis on Volume Emission Rate and Limb Radiation Intensity of Airglow at Oxygen A(O,O) Band

临近空间大气参数如温度、密度、风场等对预报模型精度及航天器运行安全等有较大的影响,而气辉的辐射模拟是大气参数反演的重要过程.本文基于光化学模型计算了氧气A(0,0)波段气辉的体发射率和临边辐射强度.基于氧气A(0,0)波段气辉的光化学反应机制、大气动力学和光化学反应理论,建立产生O2(b1∑g+)的光化学模型.计算气辉体发射率,基于临边探测几何路径进行气辉辐射强度模拟.体发射率计算结果与AURIC模型结果的辐射值及辐射高度均一致.基于计算和模拟结果,对氧气A波段气辉体发射率和辐射强度的影响因素进行了分析.

Atmospheric parameters in near space(temperature,density,wind field,etc.) have a great influence on the accuracy of the model prediction and the safety of spacecraft operation.Airglow simulation is an indispensable aspect of the inversion of the atmospheric parameter.In this paper,the Volume Emission Rate(VER) and limb radiation intensity of oxygen A(0,0) band airglow are calculated based on the photochemical model.Firstly,the photochemical model O2(b1∑g+) was established based on the theory of atmospheric dynamics,photochemical reaction mechanism,and photochemistry.Then,the VER of O2 A-band was calculated,and the limb radiation intensity of airglow is simulated using a geometric path integral along the line of sight.The simulation radiation and its corresponding height are both consistent with the results of AURIC model.Finally,based on the results of the simulation,the influence factors of VER and radiation of oxygen A-band airglow are analyzed.