Consider:

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Note added at 6 mins (2010-07-26 19:39:48 GMT)
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Transmitting sound waves under high sound pressure results in ... The roll/pitch correction can be made on-line, the heave correction on-line or off-line. .... sometimes not very good due to a lot of particles in the water column, ...
www.innomar.com/.../Hydrographic Society 2001.pdf - Similares
[PDF] Chapter 10: Mapping Lakes with Echo Sounders - [ Traducir esta página ]Formato de archivo: PDF/Adobe Acrobat - Vista rápida
Echo sounders measure the interval of time required for a sound wave emitted by a transducer to .... completed, remove that section of graph paper from the roll. ... fuzzy due to dense vegetation or equipment malfunction. .... corrections can be made with a common alidade, compass, and measuring cable. ...
www.dnr.state.mi.us/publications/pdfs/.../SMII Chapter10.pd... - Similares
Quantitative echo sounder and method of quantitative sounding of ... - [ Traducir esta página ]de T Satoh - 2007
20 Mar 2007 ... The phase correction circuits adjust phases of received echo signals based on the .... rolls or heaves) due to waves or wind, for instance, ...
www.freepatentsonline.com/7193930.html
[PDF] Geological seafloor mapping with backscatter data from a multibeam ... - [ Traducir esta página ]Formato de archivo: PDF/Adobe Acrobat - Versión en HTML
de G Kågesten - 2008 - Artículos relacionados
requires accurate calibration of the system with corrections for roll and .... echo sounder some waves will be reflected away from the source and some will be .... Due to ice cover wintertime and high erosion in the area, most algae are ...
www.w-program.nu/filer/exjobb/Gustav_Kagesten.pdf - Similares
[PDF] Tamaya Echo-Sounder ^ - [ Traducir esta página ]Formato de archivo: PDF/Adobe Acrobat - Vista rápida
Reflected waves usually contain unnecessary reflected acoustic signals ... TDM-9000A will correct it automatically when the sound velosity correction value is input. ... 5 rolls. ITEM. DESCRIPTION. 1. Check bar (reflection plate) ...
www.tamaya-technics.com/e_site/images/down/TDM-9000A.pdf
Heave-roll-pitch correction for hydrographic and multi-beam survey ... - [ Traducir esta página ]de RD Hopkins - 1981 - Citado por 2 - Artículos relacionados
OCEAN WAVES Before addressing the problem of measuring and correcting for .... heave and pointing angle corrections for a single-beam vertical echo sounder. ... On the surface it would appear that making heave-roll-pitch corrections to .... for cor- recting depth sounding measurement errors due to transducer heave. ...
linkinghub.elsevier.com/retrieve/pii/0302184X8190007X

Saludos,
eski

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Note added at 3 hrs (2010-07-26 23:13:24 GMT)
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Your more than welcome, Susana!
eski