Advances in Sonar Technology 2012 Part 11 doc

... are pointed out in this new, fascinating, and open field of research. 2. Propagation of ultrasonic waves in the atmosphere Sound propagation in the atmosphere has been the subject of intensive ... L.; Schalles, J.; Hutchins, K. & Keck, J. (2002). Classifying and mapping general coral-reef structure using Ikonos data. Photogrammetric Engineering and Remote Sensing, 68, 1297-1305...

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... models remain valid. Advances in Sonar Technology 120 since the reader dealing with low-resolution sonar images may use the very same detection method proposed in this paper using the Rayleigh ... the Independent Component Analysis for Passive Sonar Signal Processing 109 Jutten, C. and Karhunen, J. (2003) Advances in nonlinear blind source separation, Proceedi...

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... (segmentation) and kurtosis parameters in Fig. 3 Advances in Sonar Technology 140 In a similar way, we define a rate of error knowing the environment truth by the following expression: ( ) ( ) ( ) ∑ =∩ += ø 2 1log/ BA AAmBmEr ... images obtained for each proposition with the kurtosis parameter in Fig. 3 Fig. 28. Mass images obtained after fusion of the three para...

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... replaced by a final image level scaling. Computations can be performed directly in image space, removing also the need for the FFT when working in frequency domain, resulting in the following expression ... p. cm. ISBN 978-3-902613-48-6 1. Advances in Sonar Technology, Sergio Rui Silva Advances in Sonar Technology 4 Ray tracing Ray tracing (Bell 1997) is...

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... is obtained by sensing, recording, and processing the ping-to-ping phase history resulting from the variation in slant range caused by the projector’s main lobe illumination pattern moving past ... continuous 2D distribution of omni- directional (aspect independent) and frequency independent reflecting targets. This target area is illuminated by a side-looking sonar system travelling a...

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... mapping operation is carried out using an interpolation process. The final step is to invert the Fourier domain with a windowing function WW(k x ,k y ) to reduce the side lobes in the final ... 2-D weighting function to be applied to the Advances in Sonar Technology 52 3.1.4 Radiation pattern The radiation pattern or sonar footprint of a stripmap SAS system maintains th...

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... Advances in Sonar Technology 76 the scanning motion of the emitter antenna (and possibly the sensor antenna) may in this case influence the scaling. In general, we assume that the scaling ... Life Sciences, 2 Institute of Energy Technology, Department of Process and Fluid Flow Technology, Norway 1. Introduction In radar and sonar signal processing it is of interes...

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... of σ and Δ obtained by performing the computations described in the main text (solid lines) and corresponding asymptotical estimates (eqs. 26, dashed). Advances in Sonar Technology 94 ... sequence in a k is sorted according to increasing scaling to easily handle the thresholding. Each k then corresponds to a scaling threshold a k . Only data with scaling k aa≥ were retai...

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... Advances in Sonar Technology 152 Fig. 1. Comparison of sonar systems operating at different depths. Notice the increasing footprint as the distance increases. However, ... Sonar Sensor Integration Advances in Sonar Technology 154 accurate assessment of the angular direction. Interferometric technology could prove highly beneficial to seabed mapping prog...

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... illustrated in Figure 2. Line 7 is in charge of building the new local map of each particle, by adding the current set of sonar readings and discarding to oldest readings so that the map size remains ... relates the sonar readings to the robot pose. Line 3 uses the measurement model to incorporate the current readings into the particle set by computing the importance factor . Th...

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