Description
Poster presenter attendance on: Thursday 27 June from 15:00 to 16:00
On 15 November 2017, the loss of the Argentinian ARA San Juan submarine was detected by three IMS hydrophone stations, ranging from 6,000 km in the Atlantic Ocean to 12,400 km in the Indian Ocean. The great data quality and high signal to noise ratio on the two closest stations allow to identify direct and several reflected paths on different types of bathymetric structures. An original...
The IMS Hydroacoustic network consists of 6 Hydrophone stations and 5 T-stations. The T-stations are high-frequency seismic stations (sample rates of 100 Hz) situated on islands or coastal stations and intended primarily to capture signals from in-water explosions. However, while there are numerous recordings of impulsive-like signals at the hydrophone stations, recordings of this type of...
The Argentine submarine ARA San Juan went missing on 15th November 2017. The last confirmed contact was from a location around 600 kilometres offshore the San Jorge Gulf, Argentina. In order to provide information which could potentially help in the search for the ARA San Juan, CTBTO analysed data recorded by its International Monitoring System (IMS). Two IMS hydroacoustic hydrophone stations,...
The HA08 hydrophone triads to the north and south of Diego Garcia constantly record low frequency whale calls. This work builds detectors for different types of blue whales; the Antarctic, Sri Lankan, Madagascan, and an unidentified type. There are significant challenges for constructing detectors. The calls are complicated, and show variations in intensity across frequency bands, and the...
The existing infrastructure of the six Hydroacoustic System spans remote locations of the world. The first of these systems at Diego Garcia is reaching its 20 year life and consideration to the maintenance and replacement of the systems is ongoing. This presentation will discuss opportunities to incorporate advancements in active junction box design, facilitating the inclusion of wet-mate...
Conducting successful and timely at-sea installation and sustainment of International Monitoring System (IMS) hydroacoustic (HA) stations requires proactive management of the risks associated with challenging ocean environmental conditions, such as those which prevail at remote IMS HA sites. To support the planning of maritime operations for the establishment of hydroacoustic station HA04 at...
