高光谱遥感在轨替代定标模型与方法研究

Hyper-spectral remote sensing technology is the scientific front of optical remote sensing, and the main promoting force for quantificational remote sensing and its application, which premise and foundation is the spectral and radiometric calibrations for hyper-spectral remote sensing sensors. According to the application requirements of the quantificational remote sensing and the characteristics of hyper-spectral remote sensing sensors (such as the high spectral resolution, wide spectral range, continuous imaging, and so on), the model and methods of vicarious calibration will be studied systematically, including the particularities of the calibration for hyper-spectral remote sensing sensors, sensitivities of the influencing factors during this calibration, and the transfer mechanism of errors between from radiometric and spectral calibration. In addition, we propose the models and methods, including the integration of radiometer and spectrum, the modification of the abnormal values derived from the calibration for the characteristic bands, the calibration over the whole spectral range, and the validation for all those results. We plan to solve some key problems during the calibration for hyper-spectral remote sensing sensors, such as the confusion between radiometer and spectrum, the abnormal values derived from the calibration for the characteristic bands, the inconsistency and discreteness for the results of spectral calibration. Our research will improve the accuracy of vicarious calibration, and be beneficial to get the high quality calibration data by the experimental requirements of vicarious calibration and the simultaneous observation methods. The work of promoted by this proposal hasn't been reported so far in China, and has a prominent academic innovation and application prospect.

高光谱遥感技术是光学遥感发展的前沿，是推动遥感定量化应用的主力军。高光谱遥感器的光谱和辐射定标是其数据定量化应用的前提和基础。本项目面向高光谱遥感定量应用需求，针对高光谱遥感器光谱分辨率高、波段范围宽、连续成像等特点，系统研究高光谱遥感器在轨替代定标模型和方法，包括深入分析高光谱遥感定标特殊性、定标过程影响因子敏感性、以及光谱和辐射定标误差传递机制；研究高光谱遥感光谱-辐射一体化综合定标模型、特殊波段定标异常修正模型、光谱维整体定标以及最终定标结果真实性检验方法等；解决高光谱遥感定标过程中光谱与辐射缠绕问题、特殊波段定标异常问题、定标系数在光谱维离散和非一致等关键问题，并建立高光谱遥感在轨替代定标实验和观测方法规范。本项目针对高光谱遥感定标的特殊性展开系统性研究，从高光谱遥感定标机理、定标模型、定标实验等方面全面提高其定标精度和可靠性，这在国内尚属首次，具有较高学术创新价值和应用前景。

高光谱遥感技术是光学遥感发展的前沿，是推动遥感定量化应用的主力军。高光谱遥感器的光谱和辐射定标是其数据定量化应用的前提和基础。本项目研究目标旨在针对高光谱遥感器光谱与辐射定标的特殊性，开展定标机理、误差传播机制和定标模型与方法研究，解决在高光谱遥感在轨替代定标中光谱和辐射相互缠绕、特殊波段定标异常、定标系数在光谱维的离散和非一致等关键问题。项目在研究过程中，很好的实现了申请时提出的研究目标，全面完成了预定工作，无研究内容调整和变动情况、无未按计划进行的研究内容和未实现的研究目标。.本项目主要完成的工作和实现的目标包括：系统研究了高光谱遥感替代光谱定标理论基础，包括高光谱遥感器光谱漂移和光谱弯曲的物理原理、光谱定标与辐射定标的特殊性和替代定标的可行性等，并进一步分析了高光谱遥感在轨替代定标误差分析及误差传播机制，在此基础上建立了高光谱遥感器的光谱-辐射一体化综合定标、基于图像DN值的独立定标、非同步全视场替代定标、特殊波段定标异常修正、光谱维整体定标的模型与方法，并利用Micro-HyperSpec微型航空高光谱遥感器、国产TG-1、HJ-1A HIS星载高光谱遥感器、以及美国星载Hyperion遥感器的数据开展了定标实验和应用检验，最后基于理论推导和应用检验形成了高光谱遥感替代定标同步实验规范。.本项目获得的知识产权成果达到了预定目标，已经发表的论文12篇，其中SCI论文6篇，EI论文5篇；申请专利2项，其中授权1项；已经培养毕业的博士3名，硕士1名。