Kongsberg MS70 Instruction Manual
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Kongsberg MS70 Instruction Manual

Kongsberg MS70 Instruction Manual

Scientific multibeam sonar
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Instruction manual
MS70 Calibration
Scientific Multibeam Sonar
kongsberg.com/ms70
110-0090891/A

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Summary of Contents for Kongsberg MS70

  • Page 1 Instruction manual MS70 Calibration Scientific Multibeam Sonar kongsberg.com/ms70 110-0090891/A...
  • Page 3 On-line help. Caution You must never turn on the MS70 system when the ship is in dry dock. The transducer can be damaged if it transmits in the open air. Additional end-user documents related to the MS70 system can be found on our website.
  • Page 4 The information contained in this document remains the sole property of Kongsberg Discovery AS. No part of this document may be copied or reproduced in any form or by any means, and the information contained within it is not to be communicated to a third party, without the prior written consent of Kongsberg Discovery AS. Warning The equipment to which this manual applies must only be used for the purpose for which it was designed.

  • Page 5: Table Of Contents

    CALIBRATING THE MS70 ............. 7 Calibration for target strength measurements ................. 7 Calibration procedures ......................9 Preparing the MS70 for calibration ................9 Preparing the vessel for MS70 calibration ..............11 Calibration procedure using a single sphere..............12 Calibration procedure using multiple spheres ............. 14 Merging calibration data....................
  • Page 6 Kongsberg MS70 About dialog box ......................40 Beam Mode Calibration Settings dialog box .............. 40 110-0090891/A...

  • Page 7: About This Manual

    About this manual About this manual This publication provides you with the basic information required to calibrate the MS70 system. Relevant products This publication provides you with the basic information required to calibrate the MS70 system. The publication is valid for the following products: •...
  • Page 8 Kongsberg MS70 User manual for calibration ® Windows is a registered trademark of Microsoft Corporation in the United States and other countries. We want your feedback We always want to improve our products. We also want our end-user documentation to be comprehensive and relevant.

  • Page 9: Calibrating The Ms70

    Calibration views, page 21 Calibration functions and dialog boxes, page 31 Calibration for target strength measurements Calibrating the MS70 system for velocity measurements ensures that the accuracy is maintained. In order to calibrate the MS70, a reference target (calibration sphere) with known target strength (TS) is lowered into the all beams.
  • Page 10 Each beam mode to be used in a survey must be calibrated separately. For each beam, new estimates for adjusting gain and correction must be calculated using the target strength data and the reference sphere values. Any adjustments to the MS70 system files are done automatically. 110-0090891/A...

  • Page 11: Calibration Procedures

    Preparing the MS70 for calibration Prior to calibration, you must check that your MS70 is fully functional. Context A fully functional MS70 system is vital for a successful calibration. It is necessary to measure the environmental conditions before the calibration starts. Procedure Start the MS70 program.
  • Page 12 Kongsberg MS70 User manual for calibration Note When you calculate the TS, you must use the sound velocity at the depth of the sphere. Sound absorption for different salinity values Related topics Calibration procedures, page 9 110-0090891/A...

  • Page 13: Preparing The Vessel For Ms70 Calibration

    Calibrating the MS70 Preparing the vessel for MS70 calibration Prior to calibration, a suitable geographical location must be found. The necessary equipment for lowering, hoisting and handling the target sphere must be set up. The rigging description is to a great extent reproduced from ICES report 326.

  • Page 14: Calibration Procedure Using A Single Sphere

    If the current then attacks with a different angle, it will make a bad situation even worse.If the vessel is allowed to move sideways, or if the current runs abeam, this will normally give larger variations in the MS70 performance.This results in poor and not reliable calibration accuracy.
  • Page 15 This is not a necessary if all the beams are already defined as split beams. Activate the mode. Start pinging and start recording. 10 Check that the sphere is visible on the MS70 display. 11 On the menu, select Setup...

  • Page 16: Calibration Procedure Using Multiple Spheres

    This procedure explains how to do a calibration using multiple sized spheres for different frequencies to cover the frequency range of the system. Context Two spheres can be used for calibrating the MS70. Note It is important that calibration with each sphere is done with nominal performance. In the calibration program you will only see hits for the beams with frequency inside the range covered by the selected sphere.

  • Page 17: Merging Calibration Data

    Calibrating the MS70 Related topics Calibration procedures, page 9 Merging calibration data This procedure explains how to merge data from two separate calibrations using calibration spheres for different frequencies. Prerequisites Calibration data set for two calibrations of the same Beam Mode but with different calibration spheres must be available.

  • Page 18: Showing Calibration Gain Adjustments Difference

    Kongsberg MS70 User manual for calibration Related topics Calibration procedures, page 9 Showing calibration gain adjustments difference This procedure explains how to calculate and display gain adjustment difference between two separate calibrations. Prerequisites Calibration data set for two calibrations of the same beam mode must be available Context The calibration procedure will result in adjusting a set of coefficients.

  • Page 19: Showing Calibration Gain Adjustments

    Calibrating the MS70 Showing calibration gain adjustments This procedure is used to display the gain adjustment being calculated for each beam Prerequisites A calibration must have been completed and stored. Context The calibration procedure will result in adjusting a set of coefficients. These coefficients are in turn used when processing target strength data in order to get a correct and as optimum result from surveys as possible.

  • Page 20: Edit Previously Recorded Calibration Data

    – if necessary – make changes to the target strength data. Adjusting previously recorded calibration data, involves suspending or activating chosen hits. If you do this on the MS70 Processor Unit, you can save the data and update the relevant beam mode immediately.

  • Page 21: Suspending Target Strength Data For Individual Hits

    Calibrating the MS70 Suspending target strength data for individual hits This procedure explains how to delete target strength data “hits” that are in obvious error. In list, you can suspend individual echoes from the calibration processing. TS Data Prerequisites Collecting calibration data must be an ongoing process or recorded previously.

  • Page 22: Input Of Calibration Sphere Characteristics

    Calibration procedures, page 9 Input of calibration sphere characteristics Kongsberg Discovery can supply a variety of calibration spheres dedicated for different operational frequencies. Each sphere diameter is selected for minimum temperature dependence. Spheres with diameter 25, 75 and 84 mm are available.

  • Page 23: Calibration Views

    Calibrating the MS70 </TargetReference> Calibration views The different views provided display the relevant information to monitor the calibration of the selected beam mode. The best quality of the calibration will rely on several target strength detections for each beam. The layout of the beams for a selected beam mode is shown in a dedicated view.

  • Page 24: Selected Beam View

    Numerical View in the MS70, beam data, target strength data and results from the calibration. All information is represented in numerical manner. By default, the fields are automatically arranged in the MS70 views.
  • Page 25 Calibrating the MS70 You select the beam to be displayed in one of three ways. • In the field: Target Position Click on any of the echoes displayed in the field • In the field: Target Strength Click on any of the echoes displayed in the field •...

  • Page 26: Beam List

    Related topics Calibration views, page 21 Beam List displays all the beams for the MS70 system. To see data from a specific Beam List beam, click on the beam in the list. How to open...

  • Page 27: Beam Mode

    Calibrating the MS70 Description Each beam is dedicated a line in the list. The beam is identified by its beam number and operating frequency. To get detailed information about a specific beam, click on the beam in Beam List view. Observe that the Selected Beam, Beam mode and Numerical view displays information regarding the selected beam.

  • Page 28: Numerical View

    Note that this will cause one field to increase in size and another to decrease. Description information field contains an overview of the values of parameters in Numerical View the MS70, beam data, target strength data and results from the calibration. All information is 110-0090891/A...
  • Page 29 Calibrating the MS70 represented in numerical manner. The numerical information is presented in different tabs, grouping values which have a connection for clarity. • General • Beam Data • TS-Data • Results General page page shows the common data and parameters for the system used during General calibration.
  • Page 30 Kongsberg MS70 User manual for calibration Beam Data page The Beam Data page displays all individual parameters related to the selected beam. TS-Data page page displays the numerical parameters related to each individual echo. Target TS-Data strength data is collected for each beam individually. Each row represents a a target strength detection and the hit number for selected beam.
  • Page 31 Calibrating the MS70 • : Estimated target strength (in dB) including the beam compensation. TS Comp • : Estimated target strength (in dB) without beam compensation in dB. TS UnComp • : Estimated alongship angle in degrees. Along • : Estimated athwartship angle in degrees.
  • Page 32 Kongsberg MS70 User manual for calibration • : The identification of the beam. Beam Name • : Total number of hits connected to the beam. Target Hits • : The target strength value (in dB) for the reference beam at the given frequency.

  • Page 33: Calibration Functions And Dialog Boxes

    Calibrating the MS70 Calibration functions and dialog boxes Topics Menu system, page 31 File menu, page 32 View Menu, page 32 Start/Stop Menu, page 33 Help menu, page 33 Setup dialog box, page 34 Single Target Detection dialog box, page 34...

  • Page 34: File Menu

    Kongsberg MS70 User manual for calibration File menu menu for calibration provides functions for setting parameters, managing files and File reports and exit the program. Calibration How to open Select in the menu bar in the program to open the menu.

  • Page 35: Start/Stop Menu

    Calibrating the MS70 Description • TS Hits function will place the TS (target strength) hits in the TS Hits Beam mode Selected information fields. beam • Gain Adjustment Plot function allows you to view the calculated gain adjustments Gain Adjustment Plot displayed in the information field as a colour or black/white presentation.

  • Page 36: Setup Dialog Box

    Kongsberg MS70 User manual for calibration Setup dialog box dialog box allows you to define the main parameters for the calibration. Setup How to open dialog box can be opened from the menu in the program. Setup File Calibration Description...
  • Page 37 Calibrating the MS70 Description Several specific parameters are available for studies of single fish. In order to detect single fish correctly, these parameters should be defined to suit the target characteristics. Note The choices you make have no effect on the raw data you record.
  • Page 38 Not all single targets are located in the centre of the beam. Targets located off centre will offer weaker echoes due to the beam properties. The MS70 system automatically compensates for this using a mathematical model, and you can manually control the effect of this algorithm by defining a maximum gain value.

  • Page 39: Save As Dialog Box

    Calibrating the MS70 Overlapping targets will not be identified with this function. Use the Minimum Echo to handle these. Length Maximum Echo Length Maximum CW Phase Deviation Related topics Calibration functions and dialog boxes, page 31 Save As Dialog Box...

  • Page 40: Show Reports Function

    Kongsberg MS70 User manual for calibration Related topics Calibration functions and dialog boxes, page 31 Show Reports function enables you to open and read previously generated calibration reports. Show Reports How to open function is opened by selecting on the...

  • Page 41: Replay Xml Function

    Calibrating the MS70 Replay XML function function enables you to open and edit previously saved calibration files. Replay XML Description function is opened by selecting on the menu in the Replay XML Replay XML File program. Editing the calibration data can either be done during calibration, this...

  • Page 42: Start/Stop Function

    About Help Calibration Description The MS70 Calibration program is released with a specific software version. The About dialog box displays the current version number of the program. The Calibration Calibration program has a separate software version from the MS70 software.
  • Page 43 The dialog box offers three pages that allow you to take different calibration-related actions. Select page allows you to select the calibration you want to use in your MS70 Select system. The currently active calibration mode is highlighted when you open the page.
  • Page 44 Kongsberg MS70 User manual for calibration Note When you select or close the dialog with the button, your recently highlighted Apply calibration mode on the page becomes the active mode. Each calibration mode Select is accompanied by a description. Related topics...
  • Page 45 Index Index about Exit document downloads ........5 calibration..........38 online information ........5 description ..........38 registered trademarks........5 function............ 38 software license ........... 5 software version........... 5 target audience ..........5 this publication ..........5 field About dialog box Beam List information field description ....
  • Page 46 Kongsberg MS70 User manual for calibration Beam Mode information field purpose....25 Numerical information field descriptions..... 23 registered trademarks........5 Numerical View information field Replay XML descriptions..........26 description ..........39 Numerical Viewl information field purpose..26 function............ 39 Selected beam information field purpose ..... 22...
  • Page 47 Index how to open..........32 website document downloads ........5 online information ........5 110-0090891/A...
  • Page 48 ©2024 Kongsberg Discovery ISBN N/A...

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