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THEMS: an automated thermal and hyperspectral proximal sensing system for canopy reflectance, radiance and temperature.
Plant Methods ( IF 4.7 ) Pub Date : 2020-07-31 , DOI: 10.1186/s13007-020-00646-w
William Woodgate 1, 2 , Eva van Gorsel 3 , Dale Hughes 3 , Lola Suarez 4, 5 , Jose Jimenez-Berni 6 , Alex Held 1
Affiliation  

Earth Observation ‘EO’ remote sensing technology development enables original insights into vegetation function and health at ever finer temporal, spectral and spatial resolution. Research sites equipped with monitoring infrastructure such as flux towers operate at a key bridging scale between satellite platform measurements and on-the-ground leaf-level processes. This paper presents the technical details of the design and operation of a proximal observation system ‘THEMS’ that generates unattended long-term high quality thermal and hyperspectral images of a forest canopy on a short (sub-daily) timescale. The primary purpose of the system is to measure canopy temperature, spectral reflectance and radiance coincident with a highly instrumented flux tower site for benchmarking purposes. Basic system capability is demonstrated through low level data product descriptions of the high-resolution multi-angular imagery and ancillary data streams. The system has been successfully operational for more than 2 years with little to no intervention. These data can then be used to derive remotely sensed proxies of canopy and ecosystem function to study temporal forest dynamics over a wide range of wavelengths, spatial scales (individual trees to canopy), and temporal scales (minutes to multiple years). The multi-purpose system is intended to provide unprecedented spatio-temporal ecophysiological insight and to underpin upscaling of remotely sensed dynamic ecosystem water, CO2, and energy exchange processes.

中文翻译:

THEMS:用于冠层反射率、辐射率和温度的自动热和高光谱近端传感系统。

Earth Observation 'EO' 遥感技术的发展能够以更精细的时间、光谱和空间分辨率对植被功能和健康状况进行独到见解。配备监测基础设施(如通量塔)的研究站点在卫星平台测量和地面叶级过程之间的关键桥梁规模上运行。本文介绍了近端观测系统“THEMS”的设计和操作的技术细节,该系统在短(次日)时间尺度上生成无人值守的长期高质量森林冠层热和高光谱图像。该系统的主要目的是测量与高度仪表化的通量塔站点一致的树冠温度、光谱反射率和辐射率,以进行基准测试。基本系统功能通过高分辨率多角度图像和辅助数据流的低级数据产品描述来展示。该系统已成功运行 2 年多,几乎没有干预。然后,这些数据可用于导出冠层和生态系统功能的遥感代理,以研究各种波长、空间尺度(单个树木到冠层)和时间尺度(几分钟到多年)的时间森林动态。该多功能系统旨在提供前所未有的时空生态生理学洞察力,并支持遥感动态生态系统水、二氧化碳和能量交换过程的升级。该系统已成功运行 2 年多,几乎没有干预。然后,这些数据可用于导出冠层和生态系统功能的遥感代理,以研究各种波长、空间尺度(单个树木到冠层)和时间尺度(几分钟到多年)的时间森林动态。该多功能系统旨在提供前所未有的时空生态生理学洞察力,并支持遥感动态生态系统水、二氧化碳和能量交换过程的升级。该系统已成功运行 2 年多,几乎没有干预。然后,这些数据可用于导出冠层和生态系统功能的遥感代理,以研究各种波长、空间尺度(单个树木到冠层)和时间尺度(几分钟到多年)的时间森林动态。该多功能系统旨在提供前所未有的时空生态生理学洞察力,并支持遥感动态生态系统水、二氧化碳和能量交换过程的升级。和时间尺度(分钟到多年)。该多功能系统旨在提供前所未有的时空生态生理学洞察力,并支持遥感动态生态系统水、二氧化碳和能量交换过程的升级。和时间尺度(分钟到多年)。该多功能系统旨在提供前所未有的时空生态生理学洞察力,并支持遥感动态生态系统水、二氧化碳和能量交换过程的升级。
更新日期:2020-07-31
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