  INO-ICAL is a proposed underground particle physics experiment to study the
neutrino oscillation parameters by detecting neutrinos produced in the
atmospheric air showers. Iron CALorimeter (ICAL) is to have 151 layers of iron
stacked vertically, with active detector elements in between the iron layers.
The iron layers will be magnetized to enable the measurement of momentum and
charge of the $\mu^-$ (or $\mu^+$) produced by $\nu_\mu$ (or $\bar{\nu}_\mu$)
interactions. Resistive Plate Chambers (RPCs) have been chosen as the active
detector elements due to their large area coverage, uncompromised sensitivity,
consistent performance for decades, as well as cost effectiveness. The major
factors that decide the physics potential of the ICAL experiment are
efficiency, position resolution and time resolution of the large area RPCs. A
prototype detector called miniICAL (with 11 iron layers) was commissioned to
understand the engineering challenges in building the large scale magnet and
its ancillary systems, and also to study the performance of the RPC detectors
and readout electronics developed by the INO collaboration. As part of the
performance study of the RPC detectors, an attempt is made to improve the
position and time resolution of them. Even a small improvement in the position
and time resolution will help to improve the measurements of momentum and
directionality of the neutrinos in ICAL. The Time-over-Threshold (ToT) of the
RPC pulses (signals) is recorded by the readout electronics. ToT is a measure
of the pulse width and consequently the amplitude. This information is used to
improve the time and position resolution of the RPCs and consequently INO
physics potential.
