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:: Volume 14, Issue 1 (9-2024) ::
JGST 2024, 14(1): 37-50 Back to browse issues page
Examining Precision of Multibeam and Single Beam Echo-Sounder Data Through Modeling the Differences (Case Study: Bushehr Port)
Seyyed Mojtaba Zarei , Bahman Taj Firooz , Sepideh Abadpour * , Nader Pasandeh , Ali Kourosh Niya
Abstract:   (70 Views)
Hydrographic surveying in ports and seas and obtaining accurate maps of waterway bottoms is of great importance due to its role in safety of navigation and inspection of marine regions. Utilizing multi-beam eco-sounders instead of single-beam ones in bathymetry operations results in full bathymetric coverage, quality improvement as well as decrease in data acquisition time. In multi-beam bathymetry, the depths on the swath edges are affected by the complexity of used sensors. Therefore, modeling and comparing the data obtained by various sensors will result in data quality and accuracy improvement in addition to optimizing the data volume. In order to examine the difference between the data obtained by single-beam eco-sounders and the data obtained by multi-beam eco-sounders, multi-beam data were fed to the mathematical model using average sorting, after applying necessary corrections such as diffraction of sound in water, vessel rotation errors, etc. in the first step. Then in the second step, control point depths which are the data gathered by single-beam sensors were interpolated into the surface models and their values were estimated. In the third step, these estimations were compared using statistical measures. The result demonstrates that the average depth difference between the two sensors is 0.03 m, the standard deviation equals 0.08 m with 98% confidence interval and the root mean square error is 0.21 m. The research reveals that the precision of the performed survey using multi-beam echosounder matches national standards and special order in S-44 standard of International Hydrographic Organization. Furthermore, considering the field operational time, utilizing multi-beam sensors will result in the reduction of construction costs, more bathymetric coverage, and better precisions.
Article number: 4
Keywords: Single-beam echosounder, Multibeam echosounder, Hydrography standard, International Hydrographic Organization
Full-Text [PDF 1089 kb]   (74 Downloads)    
Type of Study: case report | Subject: Geo&Hydro
Received: 2024/04/6
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Zarei S M, Taj Firooz B, Abadpour S, Pasandeh N, Kourosh Niya A. Examining Precision of Multibeam and Single Beam Echo-Sounder Data Through Modeling the Differences (Case Study: Bushehr Port). JGST 2024; 14 (1) : 4
URL: http://jgst.issgeac.ir/article-1-1182-en.html


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Volume 14, Issue 1 (9-2024) Back to browse issues page
نشریه علمی علوم و فنون نقشه برداری Journal of Geomatics Science and Technology