![]() ![]() "The quality of your code is a weak spot in almost every software project you’ll ever touch. ![]() ![]() As Oleg says later in the article, "monitoring and fixing code quality issues is something that is proven to raise the quality of your application AND your ability to deliver that application to stakeholders on time."īut before we get into the outright chastisement, let's get another quote from Oleg, then cover why it's important to consider static code analysis during development. Los Altos, California: Peninsula Publishing, 1983.Static code analysis should be a big part of development. The impact of spatially-varying sound speed was noted. Next, pulses were transmitted between a projector and hydrophone in deep water with the 'Munk' sound speed profile using paths generated by Bellhop. The presence of multiple paths was apparent in the received signal. Using a rectangular waveform, an active sonar system detected two well-separated targets in shallow water. In this example, acoustic pulses were transmitted and received in shallow-water and deep-water environments. The remaining pulses have reduced amplitude compared to the direct paths due to multiple reflections at the channel bottom, each contributing to the loss. The longer delay time for the shorter path can be explained by the fact that it propagates through the slowest part of the channel. In comparing the direct path received pulses, the second pulse to arrive has the higher amplitude of the two, indicating a shorter propagation distance. Note that the two direct paths, which have no interface reflections, arrive first and have the highest amplitude. The transmitted pulses appear as peaks in the response. Import and plot the paths computed by Bellhop. They are separated by 100 kilometers in range. The source is located at a depth of 1000 meters and the receiver is located at a depth of 800 meters. In this example, the channel is 5000 meters in depth. The path information is contained in a Bellhop arrival file (MunkB_eigenray_Arr.arr). Simulate transmission between an isotropic projector and isotropic hydrophone in a target-free environment with the 'Munk' sound speed profile. You can use the path information generated by Bellhop to propagate signals via the multipath channel. In contrast, a ray tracing program like Bellhop can generate acoustic paths for spatially-varying sound speed profiles. In the previous section, the sound speed was constant as a function of channel depth. The resulting peaks could be misinterpreted as additional targets. The target return is the superposition of pulses from multiple propagation paths, resulting in multiple peaks for each target. ![]()
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