动态校准系统是空间傅里叶光谱仪的关键技术之一,而动态测角作为动态校准技术的一个重要环节,其测角精度和测角范围是动态校准系统性能的保证。空间傅里叶光谱仪的工作环境要求测角算法能够实现高精度和大范围的倾角检测,基于此设计了基于瞬时激光信号功率检测的动态测角算法,介绍了该算法实现的关键技术环节,给出了实验结果。算法原理和实验结果均表明该算法可以实现精度高于0.03 rad 和范围超过±π rad 的倾角检测,可为空间傅里叶光谱仪实时获取高质量的地球大气红外辐射干涉图提供保证。

Dynamic Alignment System (DAS) is one of the key technologies in space-borne Fourier transform spectrometer. The misalignment angle detecting is a key step of DAS. The working environment of space-borne Fourier transform spectrometer requires high precision and large scale angle detection. An algorithm is presented based on instantaneous laser power detecting, which meets the requirements of the high precision and the large scale well. Furthermore, the key steps and experiment results are introduced. Experimental results show that this method is able to achieve the precision of 0.03 rad and angle scale exceeding ±π,which offers a guarantee to space-borne Fourier transform spectrometer to receive high-quality interferograms of the infrared radiation from the earth and the atmosphere.