The first two flight models of the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument continue to operate onboard the Suomi National Polar-Orbiting Partnership (S-NPP) and NOAA-20 spacecrafts. The third flight model is set to be launched as one of a complement of instruments onboard the Joint Polar-Orbiting Satellite System-2 (JPSS-2) satellite. In addition to its 14 reflective solar bands and seven thermal emissive bands, VIIRS has a unique day–night band (DNB). The DNB is a panchromatic imager based on CCD detectors, covering a spectral range of about 500–900 nm. The DNB is made up of three gain stages, allowing the sensor to operate over a large dynamic range ( $3 \times 10 ^{-9}$ –0.02 W/cm²/sr). As part of VIIRS prelaunch ground testing, the DNB has been characterized to determine its functionality and performance under a space-like environment. The results are compared against the design specification and with previous VIIRS flight models when applicable. This article presents a comprehensive summary of the VIIRS DNB prelaunch testing and the results of radiometric and spectral assessments. The expected impact on on-orbit operations and calibrated data products are also discussed.

中文翻译：

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JPSS-2 VIIRS Day-右波段发射前辐射校准和性能


可见红外成像辐射计套件 (VIIRS) 仪器的前两个飞行模型继续在 Suomi 国家极地轨道合作伙伴 (S-NPP) 和 NOAA-20 航天器上运行。第三个飞行模型将作为联合极轨卫星系统-2 (JPSS-2) 卫星上的补充仪器之一发射。除了 14 个反射太阳波段和 7 个热发射波段外，VIIRS 还拥有一个独特的昼夜波段 (DNB)。 DNB 是基于 CCD 探测器的全色成像仪，覆盖约 500–900 nm 的光谱范围。 DNB 由三个增益级组成，允许传感器在大动态范围内运行（ $3 \乘以10 ^{-9}$ –0.02 W/cm ² /sr)。作为 VIIRS 发射前地面测试的一部分，DNB 已被表征以确定其在类太空环境下的功能和性能。将结果与设计规范以及以前的 VIIRS 飞行模型（如果适用）进行比较。本文全面总结了 VIIRS DNB 发射前测试以及辐射和光谱评估的结果。还讨论了对在轨运行和校准数据产品的预期影响。