论文部分内容阅读
为了跟踪和识别飞行的火箭,利用空间外差光谱仪对火箭尾焰辐射中钾光谱的766.490 nm和769.896 nm两条谱线进行研究。考虑大气分子吸收和大气散射对钾光谱在大气中传输的影响,采用逐线积分法、瑞利散射公式及散射系数与气象视程的关系分别计算763~773 nm波段内的氧气的吸收系数、大气分子及粒子散射系数,使用比尔-朗伯定律计算透过率。通过分析该波段内太阳辐射光谱和大气透过率可知,钾特征谱线处于太阳辐射强度弱、大气传输效率高的位置,从理论上验证了钾光谱探测的可行性。然后使用空间外差光谱仪对在火焰上燃烧的K2SO4进行探测,获得了与理论数据相符的实验数据,为火箭尾焰的空间外差光谱探测方法提供依据。
In order to track and identify the flying rocket, two spectral lines of 766.490 nm and 769.896 nm of potassium spectrum in the rocket tail radiation were studied by using space heterodyne spectrometer. Considering the influence of atmospheric molecular absorption and atmospheric scattering on the transmission of potassium spectrum in the atmosphere, the absorption coefficient of oxygen in the 763-773 nm band was calculated by using the line-by-line integral method, the Rayleigh scattering formula and the relation between the scattering coefficient and the meteorological visual range. Atmospheric molecules and particle scattering coefficients are calculated using the Beer-Lambert law. By analyzing the solar radiation spectrum and atmospheric transmittance in this band, we can see that the potassium characteristic spectrum is in a position with weak solar radiation intensity and high atmospheric transmission efficiency, and the feasibility of potassium spectrum detection is verified theoretically. Then the space heterodyne spectrometer was used to detect the K2SO4 burning in the flame, and the experimental data were obtained in accordance with the theoretical data to provide the basis for the space heterodyne spectrum detection method of the rocket tail flame.