Han Yong, Suwinski Lawrence, Tobin David, Chen Yong
Appl Opt. 2015 Dec 1;54(34):10114-22. doi: 10.1364/AO.54.010114.
Self-apodization correction increases noise of the radiance spectra measured by the Cross-track Infrared Sounder (CrIS) in three spectral bands. It also increases noise correlation between spectral channels. The degree of the noise effect depends on the spectral resolution, channel frequency, and detector position in the 3×3 detector grids on the focal planes. The effect is relatively small when CrIS is operated in the normal spectral resolution mode, but can reach to the level of a 76% noise increase and 52% noise correlation in high-frequency channels of the shortwave-band spectra from the corner detectors when CrIS is operated in the full spectral resolution mode. The noise impact of the Hamming apodization applied to CrIS spectra is also discussed.
自变迹校正会增加交叉跟踪红外探测器（CrIS）在三个光谱波段测量的辐射光谱噪声。它还会增加光谱通道之间的噪声相关性。噪声效应的程度取决于光谱分辨率、通道频率以及焦平面上3×3探测器网格中的探测器位置。当CrIS以正常光谱分辨率模式运行时，这种效应相对较小，但当CrIS以全光谱分辨率模式运行时，对于短波波段光谱中角探测器的高频通道，噪声增加可达76%，噪声相关性可达52%。本文还讨论了应用于CrIS光谱的汉明变迹的噪声影响。
