Browsing Technical Reports by Issue Date
Now showing items 81-100 of 322
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Passive localization using propagation models
(NATO. SACLANTCEN, 1987/06)Passive ranging using propagation models can be effected in two different ways: forward modeling -
Wave theory modelling of convergence zone propagation in the ocean
(NATO. SACLANTCEN, 1987/06)Improved numerical techniques together with continual advances in computer technology have now -
A collection of analytical results related to the ASW protection of convoys and carriers
(NATO. SACLANTCEN, 1987/07)This paper is a collection of diverse analytical results that are related to several aspects of a common problem: the defence of carriers against torpedo-firing submarines. This work is not in any sense a complete treatment ... -
A method for determining absolute velocities from hydrographic data
(NATO. SACLANTCEN, 1987/07)This study describes a procedure for deriving the characteristics of large-scale climatic currents from -
Passive ranging with the SNAP model: a performance study
(NATO. SACLANTCEN, 1987/07)A passive ranging technique which uses SNAP, the SACLANT Centre's normal-mode model, is studied. An examination is made of the sensitivity of the technique to errors in the assumed sound -
Deep water mass circulation in the Alboran basin: measurements - January to April '82 ALBORAN II
(NATO. SACLANTCEN, 1987/09)Alboran Sea circulation between 220 m and 1100 m depth is studied. Interaction between three water types, Atlantic water, Levantine water, and western Mediterranean Deep water cause a complicated flow pattern. Atlantic ... -
Low-frequency reverberation measurements with an activated towed array: Scattering strengths and statistics
(NATO. SACLANTCEN, 1987/10)Results of reverberation measurements made with a low-frequency activated towed array sonar system in two deep-water locations of the Mediterranean Sea are presented. Measurements took -
Testing finite differencing schemes for the shallow water equations
(NATO. SACLANTCEN, 1987/10)The explicit, the semi-implicit, and the fractional step schemes are tested and compared in the -
The effects of atmospheric and thermohaline variability on the validation of the GEOSAT altimeter oceanographic signal between Scotland and Iceland
(NATO. SACLANTCEN, 1987/10)Atmospheric and oceanographic profiles from the area between Scotland and Iceland are analysed in -
Alternative approach to passive sonar
(NATO. SACLANTCEN, 1987/10)An alternative approach to spatial processing for passive sonar is proposed and discussed. It is -
EVA - an evaluator of vague evidence in ASW situations: an expert system prototype
(NATO. SACLANTCEN, 1987/10)This paper presents an example of how an expert system can contribute to the creation and updating -
Deep water mass circulation in the Alboran Basin: Measurements - August to November'83: ALBORAN III
(NATO. SACLANTCEN, 1988/02)The circulation of the deep water mass in the western Alboran Sea is studied. Interaction between the -
Oceanographic data from the southern Tyrrhenian Sea: August to October 1984: Part 1 - Floats and moored instruments: Part 2 - Hydrography
(NATO. SACLANTCEN, 1988/02)A SACLANTCEN observational programme in the Southern Tyrrhenian Sea comprised a sequence of three cruises during the period August to November 1984. The primary purpose was to investigate the late summer water-mass variability ... -
A method for determining absolute velocities from hydrographic data: the numerical code
(NATO. SACLANTCEN, 1988/02)The numerical procedure associated with the inverse method of Peggion (1987) is described. The model equations are formulated on a spherical-shell coordinate system. The method is applied to a limited area of the basin of ... -
MAKE-MAP and MEDMAP: two programs for plotting maps of the Mediterranean Sea
(NATO. SACLANTCEN, 1988/06)Two FORTRAN programs MAKE_MAP and MEDMAP are described which, when used together, will plot maps of all or any portion of the Mediterranean Sea. Examples are given which show the high degree of detail provided by the 2' ... -
Atlantic inflow experiment, GIN Sea cruise'86: Data report: Part I: Hydrography + (Appendixes B and C)
(NATO. SACLANTCEN, 1988/06)An investigation of the inflow of North Atlantic surface water into the Greenland-Norwegian-Iceland -
Qualitative aspects of seismograph-ocean bottom interaction
(NATO. SACLANTCEN, 1988/06)The parameters affecting the coupling of the Ocean Bottom Seismometer to the ground have been -
Analysis systems for the mesoscale thermal variability in the Greenland-Iceland-Norwegian Sea
(NATO. SACLANTCEN, 1988/07)Mesoscale thermal structure and its spatial variability are very significant for acoustic propagation in the ocean. Therefore ocean thermal analysis procedures are important for the initialisation andverification of ... -
The GIN Sea: Review of physical oceanography and literature from 1972
(NATO. SACLANTCEN, 1988/07)A synthesis and review of the physical oceanography of the GIN Sea (Greenland, Iceland, and Norwegian Seas) is presented. An accompanying bibliography complete from 1972 is included. Emphasis is placed on describing the ... -
Bispectrum of ship-radiated noise
(NATO. SACLANTCEN, 1988/07)The bispectrum of ship radiated noise is estimated. The noise was received on a towed array being towed by the same ship that served as the noise source. The array was beamformed such that the forward endfire beam pointed ...