Channel variability measurements in an underwater acoustic network

The MISSION 2013 experiment was held in Singapore in November 2013. During the experiment, channel measurements were made across several network links over many days. We present preliminary channel variability analysis at two timescales for five network links over a three day period. We find that the variability in signal strength across different multipath arrivals is weakly correlated. We also observe that weaker arrivals usually exhibit more variability at a short timescale. At longer timescales, variability increases with surface and bottom interactions.