JPSS-3 / 4 VIIRS 响应随扫描角度变化的特征和性能

J. Mcintire, D. Moyer, A. Angal, Xiaoxiong Xiong
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引用次数: 0

摘要

对地球气候的科学研究越来越依赖于高质量的卫星观测。可见光红外成像辐射计套件(VIIRS)是一系列卫星[芬兰国家极轨伙伴关系(SNPP)和联合极轨卫星系统1-4 (JPSS-1-JPSS-4)]上的关键传感器,这些卫星产生用于这些气候模型的陆地、海洋和大气的科学数据。从天基传感器提供高质量的科学数据需要对仪器进行良好的校准。虽然大部分校准可以在轨道上进行,但校准的某些方面最好在发射前进行测量。发射前需要测量的一个VIIRS参数是响应与扫描角(RVS)。RVS测量扫描光学系统反射率的相对变化作为入射角的函数。利用RVS,可以将在轨测量的增益校准转移到任意扫描角度。JPSS-3和JPSS-4仪器已经进行了地面测试,包括RVS测量,这是本工作的主题。结果表明,测量结果与以前的VIIRS相当,并且有望在JPSS-3和JPSS-4入轨后为生成高质量的科学数据做出贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
JPSS-3 / 4 VIIRS response versus scan angle characterization and performance
Scientific studies of the Earth’s climate increasingly rely on high-quality satellite observations. The Visible Infrared Imaging Radiometer Suite (VIIRS) is a key sensor onboard a series of satellites [Suomi National Polar-orbiting Partnership (SNPP) and Joint Polar-orbiting Satellite System 1–4 (JPSS-1–JPSS-4)] that generate scientific data from land, ocean, and atmosphere used in these climate models. Providing quality scientific data from space-borne sensors requires the instruments to be well-calibrated. While much of the calibration can be maintained on-orbit, some aspects of the calibration can best be measured prior to launch. One VIIRS parameter that needs to be measured pre-launch is the response versus scan angle (RVS). The RVS measures the relative change in the reflectance of the scanning optics as a function of the angle of incidence. With the RVS, the gain calibration measured on-orbit can be transferred to any scan angle. The JPSS-3 and JPSS-4 instruments have undergone ground testing including the RVS measurements, which is the subject of this work. Results indicate that the measurements are comparable to previous VIIRS builds and are expected to contribute to the generation of high-quality science data once JPSS-3 and JPSS-4 are on-orbit.
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