HYPERNETS:自动高光谱辐射计网络,用于验证来自所有卫星任务的水和陆地表面反射率(380-1680 nm)。

Kevin G. Ruddick, Agnieszka Bialek, V. E. Brando, Pieter De Vis, A. Dogliotti, D. Doxaran, Philippe Goryl, C. Goyens, Joel Kuusk, Daniel Spengler, K. Turpie, Q. Vanhellemont
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引用次数: 0

摘要

卫星现在通常用于测量水面和陆地表面反射率,从而测量与环境有关的参数,如水生叶绿素 a 浓度和陆地植被指数。每次卫星任务都需要在大气层底部对所有光谱波段进行辐射验证,并涵盖卫星数据使用的所有典型条件。现有的网络,如针对水的 AERONET-OC 和针对陆地的 RadCalNet,为验证提供了重要信息,但(AERONET-OC)并不涵盖所有光谱波段,(RadCalNet)也不涵盖所有表面类型和视角。在这篇 "视角文章 "中,我们讨论了光学辐射测量领域在仪器、测量方法和不确定性估计方面的最新进展,并提出了一种观点,即需要建立一个新的自动高光谱辐射计网络,对水和陆地表面反射率进行多任务辐射测量验证。介绍了 HYPERNETS 联合网络的概念,为有关该网络具体方面的研究论文提供了背景。该网络的独特之处在于它对陆地和水面都采用了共同的方法。解释了陆地和水面测量的共同点和不同点。基于早期以验证为导向的研讨会对 HYPERNETS 数据的热情,我们认为这一新的自动高光谱辐射计网络将有助于对水和多角度陆地表面反射率进行多任务辐射验证。HYPERNETS 网络与其他测量网络(AERONET、AERONET-OC、RadCalNet、FLUXNET、ICOS、skycam 等)以及可选的补充测量(如水浊度和荧光、地表温度和土壤湿度等)具有很强的协同作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
HYPERNETS: a network of automated hyperspectral radiometers to validate water and land surface reflectance (380–1680 nm) from all satellite missions
Satellites are now routinely used for measuring water and land surface reflectance and hence environmentally relevant parameters such as aquatic chlorophyll a concentration and terrestrial vegetation indices. For each satellite mission, radiometric validation is needed at bottom of atmosphere for all spectral bands and covering all typical conditions where the satellite data will be used. Existing networks such as AERONET-OC for water and RadCalNet for land provide vital information for validation, but (AERONET-OC) do not cover all spectral bands or (RadCalNet) do not cover all surface types and viewing angles. In this Perspective Article we discuss recent advances in instrumentation, measurement methods and uncertainty estimation in the field of optical radiometry and put forward the viewpoint that a new network of automated hyperspectral radiometers is needed for multi-mission radiometric validation of water and land surface reflectance. The HYPERNETS federated network concept is described, providing a context for research papers on specific aspects of the network. This network is unique in its common approach to both land and water surfaces. The common aspects and the differences between land and water measurements are explained. Based on early enthusiasm for HYPERNETS data from validation-oriented workshops, it is our viewpoint that this new network of automated hyperspectral radiometers will be useful for multi-mission radiometric validation of water and multi-angle land surface reflectance. The HYPERNETS network has strong synergy with other measurement networks (AERONET, AERONET-OC, RadCalNet, FLUXNET, ICOS, skycam, etc.) and with optional supplementary measurements, e.g., water turbidity and fluorescence, land surface temperature and soil moisture, etc.
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