1. Department of Earth Systems Analysis, Faculty of Geo-information Science and Earth Observation, University of Twente, Enschede, The Netherlands
2. Anand Agricultural University, Anand, Gujarat State, India
3. Institute for General Ecology and Environmental Protection, TU Dresden, 01737 Tharandt, Germany
4. Saxon State Office for Environment, Agriculture and Geology, 09599 Freiberg, Germany