  The ARIANNA experiment aims to detect the radio signals of cosmogenic
neutrinos. It is running in its pilot phase on the Ross Ice-shelf, and one
station has been installed at South Pole. The ARIANNA concept is based on
installing high-gain log periodic dipole antennas close to the surface
monitoring the underlying ice for the radio signals following a neutrino
interaction. Especially, but not only in this configuration, it is essential to
understand the trajectories that the signals take through the ice. We will
report on various experimental evidence concerning the signal propagation in
ice. We will discuss the implications for neutrino detection, results of
neutrino searches and give the first introduction to a new modular simulation
framework.
