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首页> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >Measurement of the Band-to-Band Registration of the SNPP VIIRS Imaging System From On-Orbit Data
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Measurement of the Band-to-Band Registration of the SNPP VIIRS Imaging System From On-Orbit Data

机译：从在轨数据测量SNPP VIIRS成像系统的带对带配准

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摘要

The visible infrared imaging radiometer suite (VIIRS) instrument onboard the Suomi National Polar-orbiting Partnership (SNPP) satellite was launched on October 28, 2011. The VIIRS instrument is a whiskbroom system with 22 spectral and thermal bands split between 16 moderate resolution bands (M-bands), 5 imagery resolution bands (I-bands), and a day-night band. In this study, we measure the along-scan and along-track band-to-band registration between the I-bands and M-bands from on-orbit data. This measurement is performed by computing the normalized mutual information (NMI) between shifted image band pairs and finding the amount of shift required (if any) to produce the peak in NMI value. Subpixel accuracy is obtained by utilizing a bicubic interpolation. The product of the NMI peak slope and the NMI peak value is shown to be a better criterion for evaluating the quality of the NMI result than just the NMI peak value. Registration shifts are found to be similar to prelaunch measurements and stable (within measurement error) over the instrument's first four years in an orbit.
机译：Suomi国家极地轨道合作伙伴（SNPP）卫星上的可见红外成像辐射计套件（VIIRS）仪器于2011年10月28日发射。VIIRS仪器是一个旋转扫帚系统，具有22个光谱带和热能带，分为16个中等分辨率带（ M波段），5个图像分辨率波段（I波段）和昼夜波段。在这项研究中，我们从轨道数据中测量了I波段和M波段之间的沿扫描和沿轨道的带对带配准。通过计算偏移图像带对之间的归一化互信息（NMI）并找到产生NMI值峰值所需的偏移量（如果有）来执行此测量。通过利用双三次插值获得子像素精度。 NMI峰值斜率和NMI峰值的乘积被证明是评估NMI结果质量的更好标准，而不仅仅是NMI峰值。发现套准偏移与发射前的测量相似，并且在仪器运行的头四年中保持稳定（在测量误差范围内）。

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