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Sines Trial Nov.2016: Seismic data

A. Mantouka,
F. Zabel,
P. Felisberto,
P. Santos,
SiPLAB, University of Algarve, Campus de Gambelas,
PT-8005-139 Faro, Portugal

Comments: download file (cintal_rep).
Ref.: SiPLAB Report 01/17, SiPLAB, University of Algarve, February 2017.

This report discusses acoustic calibration measurements of the Dual Accelerometer Vector Sensor (DAVS) at the Arsenal tank, in Lisbon. The measurements took place on the 7th and 8th of November 2016 and aimed at the calibration of the device in the frequency range of 1 kHz to 4 kHz. The calibration was carried out in terms of sensitivity and directivity in two dimensions for the DAVS hydrophone and two accelerometers. It is shown the sensitivities of the sensor elements of DAVS (i.e. accelerometers and hydrophone) are similar the nominal values of the individual elements. Differences may be attributed to both the experimental set up and the interaction of the elements in the DAVS structure. The beam pattern of the hydrophone was found onmidirectional within 3.5 dB but the directivity measurements for the accelerometers were not conclusive. This is attributed partially to the lack of free-field conditions and partially to the DAVS structure.

ACKNOWLEDGMENT: this work was supported by project WiMUST under EU H2020, contract 645141.