Theoretical And Experimental Study On Passive Detection Of Airglow Radiation Intensity And Atmospheric Temperature

The middle and upper atmosphere(60-300km)is a dangerous and important area for satellite information transmission.Its chemical and physical processes are closely related to earth and solar activities.The temperature data of the upper atmosphere is an important parameter for the study of medium and long term weather,climate and environment.It provides support for the analysis of thermal and dynamic problems such as gravity wave propagation,atmospheric tide and photochemical reaction,and provides reference for the life and safety of aerospace equipment such as satellites,spacecraft and space station.Airglow is a kind of luminous phenomenon in the middle and upper atmosphere.It is the light source of passive remote sensing.In this paper,the detection of airglow radiation intensity and temperature in the atmosphere of 90-100km above the earth is studied.In this paper,the energy level transition and photochemical reaction equation of O(1S)and O2(0-1)airglow are studied.According to the dynamic equilibrium of atmospheric particles,the expression of VER(volume emission rate)is derived.The discrete expression of VER with height is simulated by MATLAB using the concentration of atmospheric particles in NRLMSISE-00 database.Then,in GBAII(ground-based airglow),the research group Based on the ground-based airflow VER&temperature imaging interperometer,the model of atmospheric radiation transmission is established.The three-dimensional integral expression of airglow radiation to the ground is obtained.The expression of atmospheric transmittance and VER is brought into MODTRAN model,and the expression of IER(integrated emission)is obtained by solving the integral The results show that the intensity of O 2(0-1)band is 1.45×107 photos cm-2s-1,O(1S)band is 6.57 × 105 photos cm-2s-1 and GBAVTII(Ground based airglow VER&temperature imaging interferometer)is 4.77 × 107 photos cm-2s-1.In view of the low wind measurement accuracy of GBAVTII,which leads to the instability of VER measurement accuracy,a ground-based airborne VER&temperature imaging interferometer has been developed in this paper For the prototype,O2(0-1)airglow is still selected as the detection light source,and the optical path of GBAVTII is designed.By computer modeling,the forward model and 100 forward model diagrams of five sub models including the atmospheric light source model,the atmospheric radiation transmission model,the filter model,the optical path model and the instrument response model are obtained.Then the prototype is built and on the top of the ninth floor of Xi’an University of Technology(E109.01 ° and N34.23°),the effective airglow imaging interferogram was taken outdoors,and the corresponding IER and atmospheric temperature values at 94km on December 29,2019 were 4.77 × 107 photos cm-2s-1 and 186K,respectively.The difference between 186K and 181K of saber was 5K.