CAJ | 학술논문

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.
위료근종화식별비행적화전,이용공간외차광보의대화전미염복사중갑광보적766.490 nm화769.896 nm량조보선진행연구.고필대기분자흡수화대기산사대갑광보재대기중전수적영향,채용축선적분법、서리산사공식급산사계수여기상시정적관계분별계산763~773 nm파단내적양기적흡수계수、대기분자급입자산사계수,사용비이-랑백정률계산투과솔.통과분석해파단내태양복사광보화대기투과솔가지,갑특정보선처우태양복사강도약、대기전수효솔고적위치,종이론상험증료갑광보탐측적가행성.연후사용공간외차광보의대재화염상연소적K2SO4진행탐측,획득료여이론수거상부적실험수거,위화전미염적공간외차광보탐측방법제공의거.
For tracking and recognizing a flying rock et, potassium 766.490 nm and 769.896 nm in rocket plume radiation spectrum were studied by the spatial heterodyne spectroscopy. The atmospheric molecular absorption and atmospheric scattering were considered in the atmospheric transmission model. In 763-773 nm, oxygen absorption coefficient was calculated by using line-by-line method, and atmospheric scattering coefficient was calculated by Rayleigh scattering formula and the relationship between scattering coefficient and meteorological visibility. Transmittance was calculated based on Lambert-Beer law. The analyses of solar radiation spectrum and atmospheric transmittance show that these two characteristics of potassium lines in the location which solar radiation intensity is weak and high transmission efficiency, and theoretically verify the feasibility of detection of potassium spectrum. Then, the spatial heterodyne spectrometer was used to detect potassium spectrum that K2SO4 was burned in flames. The experimental datum are accordant with the theoretical results, which demonstrate that the potassium line detection scheme is feasible using spatial heterodyne spectrometer.