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Formal Reports

Report of results of completed projects or major milestones either in scientific terms or in terms acceptable to a wider audience. Note: Unless linked to the full text, reports are only available to NATO member nations from designated distribution centres. 

Documents

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Performance modelling and validation for distributed multistatic tracking Performance modelling and validation for distributed multistatic tracking

Date added: 02/01/2005
Date modified: 08/14/2012
Filesize: Unknown

Performance modelling and validation for distributed multistatic tracking. Coraluppi, S. SR-397. February 2005.

This report develops a distributed multi-sensor tracker performance model that accounts for the target fading effect that we observe in sea trial data. We study model-based performance as a function of key tracker parameters, the choice of tracker architecture, and the number of distributed sensors. We validate the fidelity of the model by comparing model-based performance with actual tracker performance based on simulated contact data

NC3A-NURC joint trials of the SkyWAN Satcom TDMA system NC3A-NURC joint trials of the SkyWAN Satcom TDMA system

Date added: 02/01/2005
Date modified: 08/14/2012
Filesize: Unknown

NC3A-NURC joint trials of the SkyWAN Satcom TDMA system. Olivier Gauvry; Marian Machalica; Andr√© Terrasse; Alessandro Berni; Michel Leonard; Diego Merani. SR-407. February 2005.

The report documents the trials conducted by NURC and NC3A in spring 2004. Trials were to assess the real time performance of a Satcom TDMA mechanism called SkyWAN in conjunction with end-to-end IP applications. That mechanism is currently used by NURC to support its operational communication links with its two NATO research vessels when at sea. In order not to disturb these operational links, NURC negotiated with Eutelsat additional Satcom bandwidth to support those experimental trials. The major points of interest reported in that note are the description of the NURC VSAT characteristics, the configuration architecture and setting related to the NURC-NC3A trials, the basic end to end performance and a preliminary conclusion on the use of the SkyWAN mechanism.

Experimental determination of seabed scattering law and environmental parameters from reverberation Experimental determination of seabed scattering law and environmental parameters from reverberation

Date added: 02/01/2005
Date modified: 08/14/2012
Filesize: Unknown

Experimental determination of seabed scattering law and environmental parameters from reverberation. SR-403. February 2005.

Simple theory shows that one can extract the scattering law angle dependence from ratio of reverberation to one-way propagation intensity measured on a vertical array (VLA). An experiment was carried out during BOUNDARY2003 and repeated during BOUNDARY2004 using an FM sweep as sound source first to measure vertical angle-dependent monostatic reverberation then to measure angle-dependent propagation loss as the ship mounted source moved away from the VLA. Both scattering and reflection properties are deduced in several ways without the need for modelling.

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