  We report observations of the high (R$\sim$18000) and medium (R$\sim$5900)
resolution, near-infrared spectra of Jupiter's polar regions with the GNIRS
instrument at the Gemini North telescope. The observations correspond to the
area of main auroral oval in the South and the main spot of the Io footprint in
the North. We detected and assigned 18 emission lines of the H$_{3}^{+}$,
2$\nu_{2}\rightarrow 0$ overtone band in the region from 4800 to 4980 cm$^{-1}$
and 5 additional lines in the extended low-resolution spectrum. We use our new
modelling scheme, ATMOF to remove telluric absorption bands of CO$_2$ that
feature strongly in the 2 $\mu$m region. The H${_2}$ 1-0 S(1), S(2) and S(3)
emission lines are also detected in the observed spectral region. We found the
rotational temperature and column density of H$_{3}^{+}$ emission at the peak
intensity for both northern and southern auroral regions to be the same within
the measurement errors (T$_{rot} \sim950$K and N(H$_{3}^{+}$) $\sim$
4.5$\times10^{16}$m$^{-2}$). The estimates of T$_{rot}$ from H$_{2}$ are
consistent within much higher uncertainties with temperatures derived from
H$_{3}^{+}$ emissions. We derived the profiles of the H$_{3}^{+}$ emissivity
and ion density for both auroral regions providing the first such measurement
for the emission associated with the main spot of the Io footprint. We also
found a number of weaker lines in the high-resolution spectra that could be
associated with emission from high excitation levels in neutral iron, which
could be deposited in Jupiter's atmosphere as a result of meteor ablation.
