Evaluation of the VIIRS BRDF, Albedo and NBAR products suite and an assessment of continuity with the long term MODIS record
Evaluation of the VIIRS BRDF, Albedo and NBAR products suite and an assessment of continuity with the long term MODIS record
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DOI：
10.1016/j.rse.2017.09.020
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发表时间：
2017-11-01
影响因子：
13.5
通讯作者：
SanClements, Mike
中科院分区：
文献类型：
--
作者：
Liu, Yan;Wang, Zhuosen;SanClements, Mike
双向反射率分布函数 (BRDF) 模型参数、反照率量和源自 Suomi-NPP（国家极地轨道合作伙伴）卫星上的可见红外成像辐射计套件 (VITAS) 的最低点 BRDF 调整反射率 (NBAR) 产品，通过具有空间代表性的原位塔反照率计测量并通过与中分辨率成像光谱辐射计 (MODIS) 长期记录进行比较来进行评估。白天反照率（WSA）、黑天反照率（BSA）、NBAR和质量保证（QA）结果表明，VIIRS算法在全球范围内表现良好，并且能够提供与传统MODIS（短波宽带WSA的绝对偏差为0.0069）相当的全球数据产品，尽管两个传感器之间存在光谱、角度和有效空间分辨率差异。 VIIRS 和 MODIS 反照率均与许多空间代表性地点的原位反照率测量结果非常吻合。该评估让人们相信，高质量的日常 VIIRS BRDF 模型参数、Albedo 和 NBAR 产品将能够提供建模和监测社区所需的长期连续性。
Bidirectional Reflectance Distribution Function (BRDF) model parameters, Albedo quantities, and Nadir BRDF Adjusted Reflectance (NBAR) products derived from the Visible Infrared Imaging Radiometer Suite (VITAS), on the Suomi-NPP (National Polar-orbiting Partnership) satellite are evaluated with spatially representative in situ tower albedometer measurements and through comparison with the MODerate Resolution Imaging Spectroradiometer (MODIS) long term record. White Sky Albedo (WSA), Black Sky Albedo (BSA), NBAR, and Quality Assurance (QA) results show that the VIIRS algorithm is performing well at the global scale and is able to provide global data products comparable with the heritage MODIS (with an absolute bias of 0.0069 for short-wave broadband WSA) despite the spectral, angular, and effective spatial resolution differences between the two sensors. Both VIIRS and MODIS albedo are shown to agree well with in situ albedo measurements at a number of spatially representative sites. This evaluation provides confidence that the high quality, daily VIIRS BRDF model parameters, Albedo, and NBAR products will be able to provide the long term continuity required by the modeling and monitoring communities.