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首页> 外文期刊>Remote Sensing >Improved Band-to-Band Registration Characterization for VIIRS Reflective Solar Bands Based on Lunar Observations
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Improved Band-to-Band Registration Characterization for VIIRS Reflective Solar Bands Based on Lunar Observations

机译：基于月球观测的VIIRS反射太阳波段的改进的波段间配准表征

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Spectral bands of the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard the Suomi National Polar-orbiting Partnership (S-NPP) satellite are spatially co-registered. The accuracy of the band-to-band registration (BBR) is one of the key spatial parameters that must be characterized. Unlike its predecessor, the Moderate Resolution Imaging Spectroradiometer (MODIS), VIIRS has no on-board calibrator specifically designed to perform on-orbit BBR characterization. To circumvent this problem, a BBR characterization method for VIIRS reflective solar bands (RSB) based on regularly-acquired lunar images has been developed. While its results can satisfactorily demonstrate that the long-term stability of the BBR is well within ±0.1 moderate resolution band pixels, undesired seasonal oscillations have been observed in the trending. The oscillations are most obvious between the visibleear-infrared bands and short-/middle wave infrared bands. This paper investigates the oscillations and identifies their cause as the band/spectral dependence of the centroid position and the seasonal rotation of the lunar images over calibration events. Accordingly, an improved algorithm is proposed to quantify the rotation and compensate for its impact. After the correction, the seasonal oscillation in the resulting BBR is reduced from up to 0.05 moderate resolution band pixels to around 0.01 moderate resolution band pixels. After removing this spurious seasonal oscillation, the BBR, as well as its long-term drift are well determined.
机译：Suomi国家极地轨道合作伙伴关系（S-NPP）卫星上的可见红外成像辐射计套件（VIIRS）仪器的光谱带在空间上共注册。频带间配准（BBR）的准确性是必须表征的关键空间参数之一。不同于其先前的中等分辨率成像光谱仪（MODIS），VIIRS没有专门设计用于执行在轨BBR表征的机载校准器。为了解决这个问题，已经开发了一种基于规则获取的月球图像的VIIRS反射太阳波段（RSB）的BBR表征方法。尽管其结果可以令人满意地证明BBR的长期稳定性很好，在±0.1中等分辨率的带像素范围内，但在趋势中观察到了不希望有的季节性振荡。在可见/近红外波段和短/中波红外波段之间的振荡最为明显。本文研究了振荡，并将其原因确定为质心位置的波段/光谱依赖性以及在校准事件期间月球图像的季节性旋转。因此，提出了一种改进的算法来量化旋转并补偿其影响。校正后，所得BBR中的季节性振荡从高达0.05的中等分辨率带像素减少到大约0.01的中等分辨率带像素。在消除了这种虚假的季节性振荡之后，就可以确定BBR及其长期漂移。

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