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Fig. 3 | Plant Methods

Fig. 3

From: THEMS: an automated thermal and hyperspectral proximal sensing system for canopy reflectance, radiance and temperature

Fig. 3

a Birds-eye view of the projected measurement field-of-view (FOV) from two elevation scans. The flux tower is located at the image centre. The FOV is calculated as the top of canopy projected area when conducting two elevation scans (θ) at − 20° and − 32° (θ range from − 45° to − 7.5°), starting at − 130° azimuth (φ) through to 110° denoted by a white circular arrow in the clockwise direction. The projected area starts 30 m from the tower location and finishes at range of around 320 m, with some elevation angle overlap (≈ 12֯) between the two scans. The dashed grey square denotes the 1 ha TERN SuperSite plot [41]. Image from Google Earth Pro (image date: 14/4/2016). b Profile view schematic of the − 32° elevation acquisition FOV overlaid on a point cloud slice coloured by height, acquired May 2016 using a Riegl VZ400 terrestrial laser scanner. The 70 m flux tower is visible on the left-hand side of figure, with THEMS sensors located at the top. The dominant trees are around 40 m tall

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