Table 1.

Detecting one point charge: accuracy of location and charge strength estimation for a system of three hairs for three locations of the point charge: (1a) left of the hair array, (1b) above and left of hair array, (1c) directly above the hair array.

Cases	Metrics
	$\text{acc}\left({\mathbf{x}}_p\right)$	$\text{acc}\left(q_p\right)$
(1a)	$5.1\times 10^{-6}$	$1.0\times 10^{-7}$
(1b)	$5.6\times 10^{-6}$	$9.9\times 10^{-8}$
(1c)	$9.6\times 10^{-6}$	$1.7\times 10^{-7}$