1. Mechanical and Aerospace Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, U.S.A.
2. Signal and Information Processing for Sensing Systems, Institute for Bioengineering of Cataluña, Carrer Baldiri Reixac, 4, 08028, Barcelona, Spain
3. Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, Florida 33850, U.S.A.
4. Department of Agricultural and Forest Sciences, University of Palermo, Viale delle scienze, 90128, Palermo, Italy
5. Plant Sciences, University of California, Davis, One Shields Avenue, Davis, California 95616, U.S.A.