1. Department of Remote Sensing; Tartu Observatory; Tartumaa Tõravere Estonia
2. Faculty of Science and Technology; University of Tartu; Tartu Estonia
3. Department of Ecology, Environment and Plant Sciences; Stockholm University; Stockholm Sweden
4. Brockmann Consult GmbH; Geesthacht Germany
5. Department of Remote Sensing and Marine Optics; Estonian Marine Institute; University of Tartu; Tallinn Estonia