Atmospheric Correction Inter-Comparison Exercise
Atmospheric Correction Inter-Comparison Exercise
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DOI：
10.3390/rs10020352
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发表时间：
2018-02-01
期刊：
影响因子：
5
通讯作者：
Vanhellemont, Quinten
中科院分区：
文献类型：
--
作者：
Doxani, Georgia;Vermote, Eric;Vanhellemont, Quinten
大气校正相互比较练习（ACIX）是一项国际倡议，旨在分析各种最先进的大气校正（AC）处理器的表面反射率（SR）产品。气溶胶光学厚度（AOT）和水汽（WV）也在ACIX中作为AC处理的附加输出进行检查。在本文中，一般ACIX框架进行了讨论，特别提到的动机发起实验，相互比较协议，和主要结果。ACIX是免费和开放的，欢迎每个开发人员参与。最后，12名参加者将他们的方法应用于在世界各地的地点获得的各种Landsat-8和Sentinel-2图像数据集。目前的结果因传感器、产品和地点而异，表明了它们的优势和劣势。事实上，处理器间比较的第一个实现被证明是开发人员学习其方法的优点和局限性的一个很好的教训。各种算法的改进，预计，如果还没有实施，增强性能还有待评估，在未来的ACIX实验。
The Atmospheric Correction Inter-comparison eXercise (ACIX) is an international initiative with the aim to analyse the Surface Reflectance (SR) products of various state-of-the-art atmospheric correction (AC) processors. The Aerosol Optical Thickness (AOT) and Water Vapour (WV) are also examined in ACIX as additional outputs of AC processing. In this paper, the general ACIX framework is discussed; special mention is made of the motivation to initiate the experiment, the inter-comparison protocol, and the principal results. ACIX is free and open and every developer was welcome to participate. Eventually, 12 participants applied their approaches to various Landsat-8 and Sentinel-2 image datasets acquired over sites around the world. The current results diverge depending on the sensors, products, and sites, indicating their strengths and weaknesses. Indeed, this first implementation of processor inter-comparison was proven to be a good lesson for the developers to learn the advantages and limitations of their approaches. Various algorithm improvements are expected, if not already implemented, and the enhanced performances are yet to be assessed in future ACIX experiments.