1. Department of Agricultural and Biological Engineering, The Pennsylvania State University, State College, PA, USA
2. Department of Agricultural and Biological Engineering, Gulf Coast Research and Education Center, University of Florida, Wimauma, FL, USA
3. Department Department of Surveying Engineering, The Pennsylvania State University, Dallas, PA, USA
4. Department of Agricultural and Biological Engineering, Fruit Research and Extension Center, The Pennsylvania State University, Biglerville, PA, USA