Comments: no download.
Ref.: in UACE'2017, Skyathos (Greece), September 2017.
Abstract:
A prototype of the EMSO Generic Instrument Module (EGIM) was developed under EU-H2020 funded project
EMSODEV and installed at the OBSEA shallow water site, near Villanova I la Geltru (Spain) in December 2016,
for preliminary testing. The EGIM prototype was deployed in 20m water depth, cable connected to shore and
has been up and running for approximately 3 months. This work reports preliminary analysis of the recordings
obtained with the EGIM deep water hydrophone icListen from Ocean Sonics. This is a digital hydrophone packed
with acquisition configuration tools that greatly facilitate its setup. The icListen is rated for 3500m but
nevertheless shows a sufficient sensitivity and dynamic, with its 24 bits resolution and large bandwidth.
The data is clean and of very good quality. First findings reveal a series of interfering noise signatures
from nearby equipment, either on the EGIM itself or at the OBSEA structure. These include CTD, ADCP and other
potentially noisy equipment that were identified by sequential shutoff and on. Recorded noise levels show a
remarkable agreement with the current noise distribution level predictions for that coastal scenario. Noise
variations allow to detect ship traffic and surface agitation in the area.