@article {, title = {Characterization of an Ultrasonic Local Positioning System for 3D Measurements}, journal = {Sensors}, volume = {20}, year = {2020}, month = {05/2020}, pages = {2794, }, publisher = {MPDI}, issn = {1424 - 8220 }, doi = {10.3390/s20102794}, author = {K. Mannay and Ure{\~n}a, J. and A. Hernandez and M. Machhout} }