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基于线性规划的光谱响应函数反演方法初探

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光谱响应函数是卫星遥感器中各个光学元件的反射和透射特性的体现.由于遥感器发射前在地面实验室通过光谱校准获得的光谱响应函数是不准确的,而且在太空中运行的过程中,光谱响应函数可能会以未知的方式发生退化.这两种现象都会对卫星辐射定标工作的精确性产生严重影响.本文针对可见光波段,提出了一种基于线性规划的光谱响应函数反演方法,该方法具有良好的全局收敛性,不依赖于光谱响应函数初值.通过模拟的大气顶高光谱反射率数据和对应通道的卫星反射率数据可以反演得到真实状态下的光谱响应函数.在光谱响应函数的反演过程中具有有效的定性和定量性能,反演得到的光谱响应函数满足应用需求.
A Preliminary Exploration of Spectral Response Function Retrieval Method Based on Linear Programming
The spectral response function is the manifestation of the reflection and transmission characteristics of various optical components in satellite remote sensing sensors. Due to the inaccuracy of the spectral response function obtained through spectral calibration in ground laboratories prior to satellite launch,and the potential degradation of the spectral response function during operation in space in unknown ways,both phenomena can significantly impact the accuracy of satellite radiometric calibration. In this paper,a spectral response function retrieval method based on linear programming is proposed for the visible light band. This method has good global convergence and does not depend on the initial value of the spectral response function. The simulation of atmospheric hyperspectral reflectance data at the top of atmosphere and corresponding satellite reflectance data can be used to retrieve the true spectral response function. This retrieval process demonstrates effective qualitative and quantitative performance,and the retrieved spectral response function meets the requirements for practical applications.

spectral response functionvisible light bandlinear programmingretrievalhyperspectral reflectance

葛馨乐、高磊、孙凌

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北方工业大学 信息学院,北京100144

国家卫星气象中心(国家空间天气监测预警中心),北京100081

许健民气象卫星创新中心,北京100081

中国气象局遥感卫星辐射测量和定标重点开放实验室,北京100081

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光谱响应函数 可见光波段 线性规划 反演 高光谱反射率

2024

北方工业大学学报
北方工业大学

北方工业大学学报

影响因子:0.368
ISSN:1001-5477
年,卷(期):2024.36(3)