紫外臭氧垂直探测仪高精度在轨光谱定标方法研究  

Research on High-Accuracy in-Flight Spectral Calibration of the Solar Backscattered Ultraviolet Spectroradiometer

作　　者：李占峰[1,2] 王淑荣[1] 黄煜[1] 于向阳[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《光学学报》2013年第2期229-233,共5页Acta Optica Sinica

基　　金：国家自然科学基金(41074126)资助课题

摘　　要：为监测及修正紫外臭氧垂直探测仪(SBUS)在发射以及在轨运行过程中的光谱位置的偏移,采用了一种全新的高精度在轨光谱定标方法。利用高分辨率参考光谱与仪器狭缝函数进行卷积,并将卷积结果与修正后的测量光谱进行匹配,建立了相关评价函数,计算参考光谱和测量光谱误差最小时的光谱偏移量。对于SBUS,利用此方法定标得出的光谱偏移量为0.10nm。利用SBUS星上汞灯光谱验证了定标结果的最大误差为0.01nm,满足仪器指标要求。实验结果证明了高精度在轨光谱定标方法的可行性及精度。A new high-accuracy spectral calibration is applied to monitor and correct spectral shift of solar backscattered ultraviolet spectroradiometer （SBUS） in launch and flight. A high-resolution reference spectrum is used to convolve with instrument＇s slit function. The convolved results is matched with corrected spectrum measured by SBUS, and evaluation function is founded to calculate the value of the spectral shift that minimizes the difference between reference and measured spectrum. For SBUS, the optimal spectral shift is 0.10 nm. Finally, the result is validated by standard spectrum of on-board mercury lamp and the maximal error is 0. 01 nm, which meets instrument＇s requirements. The experimental results verity feasibility and precision of the high-accuracy spectral calibration.

关 键 词：遥感 在轨定标 光谱定标 狭缝函数 卷积 

分 类 号：TP722.3[自动化与计算机技术—检测技术与自动化装置]