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HemiView Delta-T Devices Hemispherical image analysis for forest canopies HemiView provides detailed and authoritative analysis of hemispherical photographs  Calculates canopy structure parameters and solar radiation indices  Predicts radiation levels beneath canopy  Ideal for tall irregular canopies Introduction Hemispherical photography is ideal for the analysis of plant canopies, especially tall, irregular canopies, such as forests. Typically photographs are taken in uniform sky conditions, looking upwards from beneath the plant canopy using a 180° fisheye lens. A self-levelling camera mount ensures the camera is held horizontally. HemiView uses the hemispherical image together with lens and site data to produce measures of canopy structure e.g. gap fraction and Leaf Area Index (LAI). Combining this information with a solar radiation model, HemiView can predict radiation levels above and below the canopy, and hence direct, indirect (diffuse) and global site factors. By plotting the solar path over the canopy and allowing for the size of the solar disc, HemiView also calculates the occurrence of sunflecks and associated solar irradiance on any chosen day of the year. Results are stored in Excel compatible worksheets. HemiView hardware The HemiView Canopy Analysis System consists of HemiView software, a digital SLR camera with fisheye lens, a self-levelling camera mount and a range of accessories. The camera provides excellent 18 megapixel resolution. The light weight self-levelling mount greatly simplifies the process of obtaining correctly oriented photographs and is essential for obtaining images high up in forest canopies. It provides LED markers fired by the flash gun that automatically places north / south orientation markers into each image taken. Sunshine Sensor type BF5 Digital SLR camera in the SLM9 Self-levelling Mount The Sunshine Sensor can be used to monitor the direct and diffuse components of PAR over extended periods. In detailed studies such data can be used to derive transmittivity and diffuse proportion values, as required for the solar model used in

HemiView specificationsOutputs Ordering information HemiView system HemiView Canopy System type HEMIv9 includes HemiView Software, SLM9 self-levelling camera mount, DCM9 Digital SLR camera, memory card, rechargeable battery & charger, SCL9 fisheye lens and MPD1 telescopic monopod. Individual items HemiView Software type HMV1 software and manual. Self-levelling Camera Mount type SLM9 for DCM9 camera, includes fibre optic flash transfer assembly. Digital SLR camera type DCM9 digital SLR camera with 18 megapixel CMOS sensor, memory card, rechargeable battery and charger. Supplied without...