Satellite-based observation of forest ecosystems response to global environmental changes | Satelitne založené sledovania odozvy lesných ekosystémov na globálne sa meniace podmienky prírodného prostredia
2009
Bucha, T., Lesnícky výskumný ústav, Zvolen (Slovak Republic) | Pajtík, J., Lesnícky výskumný ústav, Zvolen (Slovak Republic) | Priwitzer, T., Lesnícky výskumný ústav, Zvolen (Slovak Republic) | Koreň, M., Technická univ., Zvolen (Slovak Republic)
The paper presents the first results from acquisition, evaluation and calculation of biophysical and productive characteristics of forest ecosystems derived from satellite data from spectroradiometer MODIS, which we utilize in the system for continuous evaluation of forest ecosystems response on environment changes. The solved problems are aimed at (i) selection and analysis of MODIS products and their quality, (ii) derivation of annual dynamic of Normalized difference vegetation index (NDVI) by using sigmoid curve, (iii) analyses of the curve course in relation to the observed phenophases and (iv) analyses of possibilities for replacing and refining of input parameters for modeling of primary production of forest ecosystems.
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