公开(公告)号：US07558673B1

公开(公告)日：2009-07-07

申请号：US11644721

申请日：2006-12-22

申请人： Yanni Qu ,  William L. Smith

发明人： Yanni Qu ,  William L. Smith

IPC分类号： G01W1/00

CPC分类号： G01W1/02

摘要： The present invention provides a new approach for processing hyper-spectral radiance data. It uses a transformation matrix to convert an instrument radiance spectrum into a pseudo-monochromatic radiance spectrum. The pseudo-monochromatic radiance spectrum is produced by an empirical transform of the instrument channel spectrum to a monochromatic equivalent spectrum (i.e., a pseudo-monochromatic spectrum). Eigenvector regression is used to produce the empirical transformation. Although the transformation does not produce the monochromatic radiance spectrum without error, the transformation error is generally well below nominal instrument noise levels for most spectral channels. The reduction in instrument noise results from a noise filtering effect of the eigenvector transformation. One of the advantages of the present invention is that it eliminates the need to build different fast radiative transfer models (RTMs) for different observing instruments, since the retrieval of geophysical parameters is based on an inversion of the monochromatic radiative transfer model. Although a different transformation matrix is required for different instrument spectral channel characteristics, the production of this transformation matrix is straightforward and simpler than the production of an accurate channel radiance fast model.

摘要翻译： 本发明提供了一种处理超光谱辐射数据的新方法。 它使用转换矩阵将仪器辐射谱转换为伪单色辐射谱。 伪单色辐射光谱是通过仪器通道光谱对单色等效光谱（即伪单色光谱）的经验变换产生的。 特征向量回归用于产生经验变换。 尽管转换不产生没有误差的单色辐射谱，但是对于大多数光谱通道，变换误差通常远低于标称仪器噪声电平。 仪器噪声的降低是由特征向量变换的噪声滤波效应引起的。 本发明的一个优点在于，它不需要为不同的观测仪器建立不同的快速辐射传递模型（RTM），因为地球物理参数的检索是基于单色辐射传递模型的反演。 虽然对于不同的仪器光谱通道特性需要不同的变换矩阵，但是该转换矩阵的生产比制造精确的通道辐射快速模型简单和简单。