IMAGENEX DT101Xi User manual

Technical Manual
Set up and Configuration of the
Imagenex DT101Xi / DT102Xi
Multibeam Echosounder
Imagenex Technology Corp.
209-1875 Broadway Street
Port Coquitlam, BC
Canada V3C 4Z1
Telephone: [phone]
Fax: [phone]
[email protected]
www.imagenex.com
DT101Xi / DT102Xi Multibeam Echosounder
Document Number
430-041-01
Date
29 October 2020
Revision
01
For Issue
Prepared by
Imagenex Technology Corp.
Author
Tarry Waterson

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Table of Contents
1. Introduction .......................................................................................................................................5
1.1. Document Identification.................................................................................................................5
1.2. System Overview ..........................................................................................................................5
1.3. Document Overview......................................................................................................................5
1.4. Reference Documents ..................................................................................................................5
1.4.1. Acronyms and Abbreviations ................................................................................................6
2. System Description...........................................................................................................................7
2.1. Introduction....................................................................................................................................7
2.2. Operational Scenarios...................................................................................................................7
2.3. System Requirements...................................................................................................................8
3. Preparation .......................................................................................................................................9
3.1. The vessel.....................................................................................................................................9
3.2. Survey Planning............................................................................................................................9
3.2.1. Mobilization ...........................................................................................................................9
3.2.2. Establishing of Vessel Reference Frame and Sensor Static Offsets..................................12
3.2.3. Vessel Dimensional Control / Shape File............................................................................14
3.2.4. Survey Line Generation ......................................................................................................14
3.2.5. Ping Rate and Survey Speed..............................................................................................16
3.2.6. Sounding Grid Size .............................................................................................................16
3.2.7. Datum Set-up......................................................................................................................18
3.2.8. Navigation ...........................................................................................................................18
3.2.9. Background Graphics..........................................................................................................19
3.2.10. Time Synchronization..........................................................................................................19
3.2.11. Survey Log..........................................................................................................................19
4. Pre-survey Observations ................................................................................................................20
4.1. Sound Velocity Cast....................................................................................................................20
4.2. MBES Patch Test........................................................................................................................21
4.2.1. Latency................................................................................................................................23
4.2.1. Roll ......................................................................................................................................25
4.2.2. Pitch ....................................................................................................................................26
4.2.3. Yaw .....................................................................................................................................27
4.3. Bar Check....................................................................................................................................29
4.4. Performance Test........................................................................................................................29
4.4.1. Reference Surface ..............................................................................................................29
4.4.2. Check lines..........................................................................................................................30
4.4.3. Processing Performance Test.............................................................................................30
5. Operations ......................................................................................................................................33
6. Data Processing..............................................................................................................................34

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APPENDIX A DT101Xi / DT102Xi Spec Sheets................................................................................35
APPENDIX B DT100 SIR –DT101Xi / DT102Xi Sonar Cable ..........................................................43
APPENDIX C DT100 SIR unit interface............................................................................................44
APPENDIX D WINDOWS™ TCP/IP Set-up and TROUBLESHOOTING.........................................60
APPENDIX E QUICK CHECK LIST..................................................................................................63

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Figures and Tables
Figure 2-1 Examples of MBES data acquired with a DT101Xi on a small survey vessel 7
Figure 3-1 Orientation of the DT101Xi 10
Figure 3-2 Orientation of the DT102Xi 10
Figure 3-3 MRU Axes of Rotation ([mm] and inches): 11
Figure 3-4 General convention for sensor static offsets 12
Figure 3-5 Acoustic centre of transducer ([mm] and inches) 13
Figure 3-6 Line spacing example [Manual on Hydrography] 15
Figure 3-7 100% Beam Overlap 15
Figure 3-9 Square Inscribed by Ellipse 18
Figure 4-1 Latency lines 23
Figure 4-2 [Sketch courtesy of A Godin] 24
Figure 4-3 Roll lines 25
Figure 4-4 [Sketch courtesy of A Godin] 25
Figure 4-5 Pitch lines 26
Figure 4-6 [sketch courtesy of A Godin] 27
Figure 4-7 Yaw lines 28
Figure 4-8 [sketch courtesy of A Godin] 28
Figure 4-9 Reference surface lines 30
Figure 4-10 Check lines 30
Figure 4-11 Hypack XYZ options 31
Figure 4-16 Image courtesy of [Whittaker et al] 31
Figure 4-13 Hypack example 32
Figure 6-1 Sonar Cable Schematic 43
Figure 6-2 Sensor Interface Relay Schematic 44
Figure 6-3 GPS cw PPS External 48
Figure 6-4 Dual Antenna GNSS cw PPS External 49
Figure 6-5 GNSS with Internal PPS 50
Figure 6-6 GNSS (no heading nor internal PPS) 51
Figure 6-7 Jumpers for Heading and PPS Selection 52
Figure 6-8 Power Supply Voltage Option 56

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1. Introduction
1.1.Document Identification
This document describes the recommended configuration and set-up of the DT101Xi and DT120Xi Multibeam
Echo Sounders and outlines considerations to be made whilst planning and conducting a multibeam
bathymetric survey.
1.2.System Overview
The DT101Xi and DT102Xi are advanced Multibeam Echo Sounder systems with optional integrated motion
reference units and sound velocity sensors.
1.3.Document Overview
This document provides recommendations for the setting up, configuration and operation of the DT101Xi and
DT102Xi Multibeam Echo Sounders. The document covers general theory of operations, best practices and
recommended settings for DT101Xi and DT102Xi, to enable the user to obtain the best possible results. The
document is targeted at users, and is not intended as a high-level reference. Since users make use of several
sensors, data acquisition packages etc., the document is generic in nature.
1.4.Reference Documents
The following documents were used during the compilation of this guide:
•The Calibration of Shallow Water Multibeam Echo-Sounding Systems –A Godin, March 1998
•Manual on Hydrography - International Hydrographic Organization Publication C-13, May 2005
•Multibeam Sonar Performance Analysis Value and Use of Statistical Techniques - C. Whittaker, May
2011
•Estimation of Effective Swath Width for Dual-Head Multibeam Echosounder - Grządziel, Wąż 2016