EXAMINATION OF SOIL AND PLANT BIOTIC AND ABIOTIC STRESS FACTORS BY THERMAL AND HYPERSPECTRAL REMOTE SENSING METHODS

The remote sensing technologies provide the most suitable solution for the examination and the monitoring of the stress effects of soil and plant on a vast area. In the first part of our research work we describe the measurement method of the AGA 782 thermovision camera and the measurement results of the plant production and the sylviculture. The utilization of the AISA DUAL aerial hyperspectral scanner is presented in the second part. Hyperspectral remote sensing is one of the latest surface cover examining methods, that is the full spectral measurement is done simultaneously by splitting a big area into image elements. A fairly continuous spectrum curve is available for us on all image elements. The available reflectance curves in the 400-2500 nm spectral band provide us an opportunity on the one hand to separate the different types of the plants and on the other hand to separate the healthy and the under stress standing vegetation. In the case of the soil we can draw conclusions concerning the moisture content and the mineral substance from the reflectance curves. This method was successfully used in foreign "Hyperspectral EU projects", which was taken in Finland, Switzerland and Germany in 2008.