Author(s)

Osvaldo Faggioni^1,2, Maurizio Soldani², Giacomo Cozzani³, Rodolfo Zunino¹

¹DITEN-SEALab-ACM Laboratory, Department of Electric, Electronic, Telecommunication Engineering and Naval Architecture, University of Genoa, Genoa, Italy.
²Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy.
³CNR—Consiglio Nazionale delle Ricerche, ITD—Istituto per le Tecnologie Didattiche, Genoa, Italy.

The paper tackles the problem of reading singularities of the geomagnetic field in noisy underwater (UW) environments. In particular, we propose a novel metrological approach to measuring low-amplitude geomagnetic signals in hard noisy magnetic environments. This research action was launched to develop a detection system for enforcing the peripheral security of military bases (harbors/coasts and landbases) and for asymmetric warfare. The concept underlying this theory is the spatial stability in the temporal variations of the geomagnetic field in the observation area. The paper presents the development and deployment of a self-informed measurement system, in which the signal acquired from each sensor—observation node—is compared with the signal acquired by the adjacent ones. The effectiveness of this procedure relates to the inter-node (sensor-to-sensor) distance, L; this quantity should, on one hand, correlate the noise and, on the other hand, decorrelate the target signal. The paper presents the results obtained, that demonstrate the ability of self-informed systems to read weak magnetic signals even in the presence of very high noise in low-density ionic solutions (i.e. sea water).

Geomatic, Geophysical Signals Processing, Geomagnetic Metrology, Harbor Protection, Counterterrorism Mag Security System

Faggioni, O. , Soldani, M. , Cozzani, G. and Zunino, R. (2018) Informative Signal Analysis: Metrology of the Underwater Geomagnetic Singularities in Low-Density Ionic Solution (Sea Water). Journal of Signal and Information Processing, 9, 1-23. doi: 10.4236/jsip.2018.91001.