为满足空间大气痕量气体探测的迫切需求, 设计并研制了一个空间遥感大气痕量气体临边探测仪原型样机.该样机光学系统由离轴抛物面望远镜和改进型Czerny-Turner光谱仪组成, 工作波段为380～570 nm.在工作波段内, 点列图半径的均方根值均小于9 μm, 校正了像散, 整个工作波段内同时获得了良好的成像质量.原型样机质量12 kg, 体积420×350×200 mm3, 空间像元分辨力0.6 km, 光谱分辨力0.86 nm, 各项指标均满足要求.利用临边探测仪原型样机进行了外场观测试验, 外场观测光谱数据与模拟光谱数据进行了比对, 二者具有很好的一致性, 表明大气痕量气体临边探测仪功能和性能良好, 满足大气痕量气体探测的应用要求.

In order to meet the urgent requirements of detecting atmospheric trace gas in space, a limb sounder prototype of atmospheric trace gas for spaceborne remote sensing is designed and developed. The optical system of the prototype is composed of an off-axis parabolic telescope and a modified Czerny-Turner spectrometer, and the working wavelength band from 380 nm to 570 nm. The root-mean-square spot radius is less than 9 μm over. The astigmatism is corrected, and the good image quality is obtained over the working wavelength band. The mass of the prototype is 12 kg, the volume is 420×350×200 mm3, the spatial pixel resolution is 0.5 km, and the spectral resolution is 1nm, and all the requirements are satisfied. The field sounding experiment is implemented using the limb sounding prototype. The spectral data measured is compared with spectral data simulated, and consistent with spectral data, which indicates that the limb sounder prototype has good function and performance, and satisfies the application requirements of sounding of atmospheric trace gas.