  According to the recent results of the neutrino oscillation experiment MINOS,
the neutrino mixing angle $\theta_{23}$ may not be maximal ($45^{\circ}$). Two
nearly degenerate solutions are possible, one in the lower octant (LO) where
$\theta_{23}<45^{\circ}$, and one in the higher octant (HO) where
$\theta_{23}>45^{\circ}$. Long baseline experiments measuring the
$\nu_{\mu}\rightarrow\nu_{e}$ are capable of resolving this degeneracy. In this
work we study the potential of the planned European LBNO experiment to
distinguish between the LO and HO solutions.
