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The accurate determination of the quality parameters of crops requires a spectral range from 400 nm to 2500 nm (Kawamura et al.,\ud2010, Thenkabail et al., 2002). Presently the hyperspectral imaging systems that cover this wavelength range consist of several\udseparate hyperspectral imagers and the system weight is from 5 to 15 kg. In addition the cost of the Short Wave Infrared (SWIR)\udcameras is high (~ 50 k€). VTT has previously developed compact hyperspectral imagers for drones and Cubesats for Visible and\udVery near Infrared (VNIR) spectral ranges (Saari et al., 2013, Mannila et al., 2013, Näsilä et al., 2016). Recently VTT has started\udto develop a hyperspectral imaging system that will enable imaging simultaneously in the Visible, VNIR, and SWIR spectral\udbands. The system can be operated from a drone, on a camera stand, or attached to a tractor. The targeted main applications of the\udDroneKnowledge hyperspectral system are grass, peas, and cereals. In this paper the characteristics of the built system are shortly\uddescribed. The system was used for spectral measurements of wheat, several grass species and pea plants fixed to the camera\udmount in the test fields in Southern Finland and in the green house. The wheat, grass and pea field measurements were also\udcarried out using the system mounted on the tractor. The work is part of the Finnish nationally funded <q>DroneKnowledge –\udTowards knowledge based export of small UAS remote sensing technology</q> project

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

VISIBLE, VERY NEAR IR AND SHORT WAVE IR HYPERSPECTRAL DRONE IMAGING SYSTEM FOR AGRICULTURE AND NATURAL WATER APPLICATIONS