1. National Research Council, Institute of Electromagnetic Sensing of the Environment, 20133 Milan, Italy
2. Tartu Observatory, Department of Remote Sensing, University of Tartu, 61602 Tõravere, Estonia
3. University of Sapienza, Department of Engineering, 00185 Rome, Italy
4. ARPA Umbria, Regional Environmental Protection Agency, 06132 Perugia, Italy
5. NBFC, National Biodiversity Future Center, 90133 Palermo, Italy