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Article Open Access October 18, 2022

Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey

Daniel Devote Basil 1,* and Lawrence Hart, KuroTamuno Peace Jackson 1
1
Department of Surveying and Geomatics, Faculty of Environmental Sciences, Rivers State University, Nigeria
Publihed in: Current Research in Public Health (Volume 2, Issue 1, 2022)
Page(s): 38-46
DOI: 10.31586/wjgg.2022.456
Received
September 08, 2022
Revised
October 08, 2022
Accepted
October 16, 2022
Published
October 18, 2022
Keywords
Patch Test; Multi-Beam Sonar; Motion Sensor; Gyro; Octan V
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright: Copyright © The Author(s), 2022. Published by Scientific Publications
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Cite This Article

APA Style
Basil, D. D. , Hart, L. , & Jackson, K. P. (2022). Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey. Current Research in Public Health, 2(1), 38-46. https://doi.org/10.31586/wjgg.2022.456
ACS Style
Basil, D. D. ; Hart, L. ; Jackson, K. P. Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey. Current Research in Public Health 2022 2(1), 38-46. https://doi.org/10.31586/wjgg.2022.456
Chicago/Turabian Style
Basil, Daniel Devote, Lawrence Hart, and KuroTamuno Peace Jackson. 2022. "Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey". Current Research in Public Health 2, no. 1: 38-46. https://doi.org/10.31586/wjgg.2022.456
AMA Style
Basil DD, Hart L, Jackson KP. Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey. Current Research in Public Health. 2022; 2(1):38-46. https://doi.org/10.31586/wjgg.2022.456 
@Article{crph456,
AUTHOR = {Basil, Daniel Devote and Hart, Lawrence and Jackson, KuroTamuno Peace},
TITLE = {Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey},
JOURNAL = {Current Research in Public Health},
VOLUME = {2},
YEAR = {2022},
NUMBER = {1},
PAGES = {38-46},
URL = {https://www.scipublications.com/journal/index.php/WJGG/article/view/456},
ISSN = {2831-5162},
DOI = {10.31586/wjgg.2022.456},
ABSTRACT = {A hydrographic survey vessel shows three -dimensional movements (Roll, Pitch and Heave) misalignment with respect to the vessel reference unit (VRU) due to environmental effects, such as wind, current, other vessel wakes, etc. These motions if ignored, cause errors in measured depth and in the positioning of the sounding. Hence the need of a motion sensor and gyroscope. However, the alignment of the multi-beam sonar head to the motion sensor and gyro (Octant) is critical to the accuracy of the determined depths. It is not possible to install the sonar head in perfect alignment with the motion sensor and gyroscope to the accuracy required. The synchronization of the GPS time with the Motion sensor and gyro, the latency of the position, as reported by the GPS as well as the velocity of sound in water are important parameters to account for the misalignment of the motion senor and the multi beam sonar head; this is called the Patch Test. In view of this, a patch test was done to ascertain the mounting angles of EMB 2058 Multi-beam sonar with Octan V installed onboard a survey vessel (Bitam). The result of the Patch test gives a row, pitch and heading value of -1.242˚, -4.92˚, and -0.48˚respectively. The speed of sound in water as measured ranges from; 1531.47m/s to 1531.60m/s within a minimum cast depth of 0.49m and maximum cast depth of 16.00m. The statistical analysis gives and average error of 2.642cm/m2 which was within acceptable standard as define by the International Hydrographic Organization (IHO).},
}
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%A Basil, Daniel Devote
%A Hart, Lawrence
%A Jackson, KuroTamuno Peace
%D 2022
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%T Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey
%M doi:10.31586/wjgg.2022.456
%U https://www.scipublications.com/journal/index.php/WJGG/article/view/456

TY  - JOUR
AU  - Basil, Daniel Devote
AU  - Hart, Lawrence
AU  - Jackson, KuroTamuno Peace
TI  - Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey
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PY  - 2022
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SN  - 2831-5162
SP  - 38
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AB  - A hydrographic survey vessel shows three -dimensional movements (Roll, Pitch and Heave) misalignment with respect to the vessel reference unit (VRU) due to environmental effects, such as wind, current, other vessel wakes, etc. These motions if ignored, cause errors in measured depth and in the positioning of the sounding. Hence the need of a motion sensor and gyroscope. However, the alignment of the multi-beam sonar head to the motion sensor and gyro (Octant) is critical to the accuracy of the determined depths. It is not possible to install the sonar head in perfect alignment with the motion sensor and gyroscope to the accuracy required. The synchronization of the GPS time with the Motion sensor and gyro, the latency of the position, as reported by the GPS as well as the velocity of sound in water are important parameters to account for the misalignment of the motion senor and the multi beam sonar head; this is called the Patch Test. In view of this, a patch test was done to ascertain the mounting angles of EMB 2058 Multi-beam sonar with Octan V installed onboard a survey vessel (Bitam). The result of the Patch test gives a row, pitch and heading value of -1.242˚, -4.92˚, and -0.48˚respectively. The speed of sound in water as measured ranges from; 1531.47m/s to 1531.60m/s within a minimum cast depth of 0.49m and maximum cast depth of 16.00m. The statistical analysis gives and average error of 2.642cm/m2 which was within acceptable standard as define by the International Hydrographic Organization (IHO).
DO  - Assessment of the Effects of Sensors Misalignment of a Multi-Beam Hydrographic Survey
TI  - 10.31586/wjgg.2022.456
ER  -