光谱学与光谱分析, 2014, 34 (4): 927, 网络出版: 2014-04-09  

高稳定度可见/短波红外在轨相对定标监测系统关键技术研究

Study on In-Orbit VIS/SWIR Relative Calibration Monitoring System with High Stability
刘懿 1,2,*尹达一 1
作者单位
1 中国科学院上海技术物理研究所, 上海 200083
2 中国科学院大学, 北京 100049
摘要
针对高稳定度遥感器在轨相对定标监测系统关键技术进行研究, 阐述了工作原理和关键技术。 研制了基于可见/短波红外双波段陷阱结构的高稳定度定标探测器组件, 通过选择高灵敏度单元可见和短波红外光电探测器, 一方面使探测器组件工作在线性更好、 暗电流更低的零偏置光伏电路模式, 另一方面使探测器组合成为复合型陷阱光机探测模式, 并在模拟前放电路和数据采集环节进行了关键参数设计, 完成了星载定标辐射源输出辐射的高稳定度相对定标监测系统设计。 通过实验室内积分球以及国家计量技术机构提供的标准灯的辐射测试结果表明, 系统获取的码值相对标准方差达到0.030%~0.046%(可见通道)和0.040%~0.059%(短波红外通道), 实现了相对定标系统的高稳定度监测, 为未来遥感器在轨相对定标提供一种优良的解决方案。
Abstract
The present paper studied the in-orbit relative calibration monitoring system with high stability for onboard remote sensing calibration. The realizing principle and the critical technologies are described in detail. The calibration detector assembly with high stability was developed based on both visual (Vis) and shortwave infrared (SWIR) trap structure. Vis and SWIR photodetectors with high sensitivity were chosen to realize the photoelectric conversion. On the one hand, the detectors worked in the zero-bias photovoltaic mode with better linearity and lower dark current. On the other hand, the critical parameters of the analog operational amplifier circuit and data acquisition circuit were designed so that the trap-structure detector assembly could work properly. Thus the relative calibration monitoring system with high stability for measurement of spaceborne calibration radiance source was realized. The experiments were carried out using the laboratory integrating spheres and the standard lamps provided by the national measurement institution. The results showed that the relative standard deviation of the digital numbers that the system acquired reached to 0.030%~0.046% (Vis) and 0.040%~0.059% (SWIR). It was proved that the accuracy and the stability of the monitoring system could meet the in-orbit calibration system requirement and it could serve as a good solution for in-orbit relative calibration of remote sensor in the future.

刘懿, 尹达一. 高稳定度可见/短波红外在轨相对定标监测系统关键技术研究[J]. 光谱学与光谱分析, 2014, 34(4): 927. LIU Yi, YIN Da-yi. Study on In-Orbit VIS/SWIR Relative Calibration Monitoring System with High Stability[J]. Spectroscopy and Spectral Analysis, 2014, 34(4): 927.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!