1. Research Group on Environmental Sensing and Intelligence, Centre for Biorobotics, Department of Computer Systems, Tallinn University of Technology, Tallinn, Estonia;
2. School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK;
3. SINTEF Energy Research, Trondheim, Norway;
4. LimoTech assigned to U.S. Army Engineer Research and Development Center, Vicksburg, MS, USA