Table A1.

Predefined measuring positions of the smartphone.

Full Name	Short Name	$\mathit{\theta }$-Angle	$\mathit{\phi }$-Angle	Min r (mm)	Max r (mm)
Central	$P_{r,C}$	0	0	200	600
Up-1	$P_{r,U1}$	$11.25$	0	200	600
Up-2	$P_{r,U2}$	$11.25$	0	200	600
Up/Left-1	$P_{r,UL1}$	$11.25$	$-11.25$	200	600
Up/Left-2	$P_{r,UL2}$	$22.5$	$-22.5$	200	600
Left-1	$P_{r,L1}$	0	$-11.25$	200	600
Left-2	$P_{r,L2}$	0	$-11.25$	200	600
Down/Left-1	$P_{r,DL1}$	$-11.25$	$-11.25$	200	600
Down-1	$P_{r,D1}$	$-11.25$	0	200	450
Down-2	$P_{r,D2}$	$-22.5$	0	200	350
Down/Right-1	$P_{r,DR1}$	$-11.25$	$11.25$	200	400
Down/Right-2	$P_{r,DR2}$	$-22.5$	$22.5$	200	300
Right-1	$P_{r,R1}$	0	$11.25$	200	550
Right-2	$P_{r,R2}$	0	$22.5$	200	600
Up/Right-1	$P_{r,UR1}$	$11.25$	$11.25$	200	500
Up/Right-2	$P_{r,UR2}$	$22.5$	$22.5$	200	600