  We compute the expected sensitivity on measurements of optical depth to
reionization for a ground-based experiment at Teide Observatory. We simulate
polarized partial sky maps for the GroundBIRD experiment at the frequencies 145
and 220 GHz. We perform fits for the simulated maps with our pixel-based
likelihood to extract the optical depth to reionization. The noise levels of
polarization maps are estimated as 110 $\mu\mathrm{K~arcmin}$ and 780 $
\mu\mathrm{K~arcmin}$ for 145 and 220 GHz, respectively, by assuming a
three-year observing campaign and sky coverages of 0.537 for 145 GHz and 0.462
for 220 GHz. Our sensitivities for the optical depth to reionization are found
to be $\sigma_\tau$=0.030 with the simulated GroundBIRD maps, and
$\sigma_\tau$=0.012 by combining with the simulated QUIJOTE maps at 11, 13, 17,
19, 30, and 40 GHz.
