Aerospace and Electronic Systems Magazine March 2018 - 57

Dzvonkovskaya

Figure 8.

The Ocean Networks Canada initiative: near-field tsunami alert installation of bottom pressure sensors (orange squares) and WERA system coverage
(grey circular sector) [28].

sion makers and become a useful complement to the already existing water level measurement network. It was shown in simulations
and by real tsunami events that under most conditions, phased
array radar systems have a better spatial resolution and significantly faster information update rates as compared with compact
direction-finding radar systems. The latter can be well used for retrospective analysis and research and therefore bring helpful information to study tsunami propagation behaviour. Moreover, phased
array radar systems can be a valuable component of an enhanced
TEWS information, which is vital for tsunami warning and emergency response decision-making authorities. In this work, the term
"early warning" was not used to describe the information delivered
by HF radar, because an actual tsunami warning is issued by local authorities, who are responsible for population and evacuation
processes. All sensors, including HF surface wave radar systems
MARCH 2018

integrated into TEWS, deliver only advisable information regarding a tsunami threat.

REFERENCES
[1]

[2]

[3]

IEEE A&E SYSTEMS MAGAZINE

Fabrizio, G. A. High Frequency Over-the-Horizon Radar: Fundamental Principles, Signal Processing, and Practical Applications (1st ed.).
New York: McGraw-Hill Education, 2013.
Harlan, J., Terrill, E., Hazard, L., Keen, C., Barrick, D., Whelan, C.,
et al. The integrated ocean observing system high-frequency radar
network: status and local, regional, and national applications. Marine
Technology Society Journal, Vol. 44, 6 (2010), 122-132.
Riethmüller, R., Colijn, F., Breitbach, G., Krasemann, H.-J., Petersen,
W., Schroeder, F., et al. COSYNA, a German initiative for an integrated coastal observing system. In Proceedings of the OceanObs'09

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