Compute indices along temporal dimension corresponding to the sought percentile

            :param data: Input 3D array holding the reference band
            :type data: numpy array
            :return: 2D array holding the temporal index corresponding to percentile

def _get_indices(self, data):
        """ Compute indices along temporal dimension corresponding to the sought percentile

            :param data: Input 3D array holding the reference band
            :type data: numpy array
            :return: 2D array holding the temporal index corresponding to percentile
        """
        indices = self._index_by_percentile(data, self.percentile)
        return indices