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Natural Science Forum / Earth Science / Oceanography / November 2005what determines resolution: pulselength or frequency
Helo, I am looking for a reference dealing about fundamentals of sonars like multibeam, sub bottom profiler or side scan. Especially I am interested in the determination of the resolution of each method. I dont really understand the implications of pulse length and frequency on the range resolution, sure I know the fact of "resolution is 1/4 'th of a Wavelength, but in detail? cheers Jens > Helo, > [quoted text clipped - 4 lines] > resolution, sure I know the fact of "resolution is 1/4 'th of a > Wavelength, but in detail? The resolution in range is half the sound speed divided by the bandwidth. If the transmit signal is a CW pulse, the bandwidth is the inverse of the pulselength. A good and recent reference is a book written by Xavier Lurton. An older classic is Urick's book. |
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