Numerical View
How to open
The Numerical View information field is located in the lower right side of the Calibration dialog box. You can easily change the physical size and shape of the fields. Click on the grey lines between the fields and drag to new size. Note that this will cause one field to increase in size and another to decrease.
Description
The Numerical View information field contains an overview of the values of parameters in the ME70, beam data, target strength data and results from the calibration. All information is 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
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The General page shows the common data and parameters for the system.
•  Calibration: System information
•  Transceiver parameters common to all beams
•  Reference target and common limits in depth and deviation
•  Target strength detection parameters used by all beams
Beam Data page
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The Beam Data page displays all individual parameters related to the selected beam.
TS-Data page
The TS-Data page displays the numerical parameters related to each individual echo. Target strength data is collected for each beam individually. Each row represents a a target strength detection and the hit number for selected beam. The target strength data presented in rows are:
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•  Number: Continuous numbering of hit for selected beam.
•  Time: Ping time of detection.
•  Depth: Estimated depth to target in meter.
•  TS Comp: Estimated target strength (in dB) including the beam compensation.
•  TS UnComp: Estimated target strength (in dB) without beam compensation in dB.
•  Along: Estimated alongship angle in degrees.
•  Athwart: Estimated athwartship angle in degrees.
•  sA: Area backscatter strength (in m2/nmi2) when integrating the target pulse.
Note
Click on Time (column name) to sort the hits by most recent. To change to a different sort order, click on any other column name.
You must inspect the target strength data carefully, and delete all data that obviously does not belong to the current target reference. Pay special attention to the depth estimate and suspicious target strength values when editing the data collection. To help you with this process, the strongest target detection is identified with red colour, while the weakest target is identified in blue.
Suspending individual echoes
The TS-Data tab has two operational modes. Select mode enables you to select a a target strength detection for further enquiries. Select mode is the default mode. To enter select mode, click on the Select button. Select a target strength detection in the beam by using the clicking on the row. The selected target strength detection will be visible in both Selected Beam and Beam Mode using the colour blue.
To enter Suspend mode, click on the Suspend buttonat the bottom of the list. Clicking on a target in the Suspend mode will mark this target in pink colour, and exclude it from all calculations. The suspended target will remain in the data set, and it can be “unsuspended” by clicking on it one more time.
Tip
If you wish to suspend multiple hits adjacent to each other, click once on the first hit. Then, hold the keyboard Shift button depressed, and move up or down using the Arrow keys.
Results page
This tab shows a summary of the calibration results for all beams. The calculation of these parameters is made for each ping. Each row represents a beam and consist the following information:
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•  Beam Name: The identification of the beam.
•  Target Hits: Total number of hits connected to the beam.
•  TS Sphere: The target strength value (in dB) for the reference beam at the given frequency.
•  TS Median: Median target strength (in dB), calculated by sorting all target strength values into an array and selecting the target strength value in middle of this array.
•  TS Average: Average target strength (in dB), calculated by summing all target strength values (linear) and divide by the total number of hits.
•  TS Std. Dev: Standard Deviation (in dB) of the target strength data for the beam.
•  Gain Nominal: Pre-calculated gain estimate (in dB).
•  Gain Adjust: Adjustment to the nominal gain estimate (in dB).
•  SA-Correction: Nominal SA correction for (-1.59 dB). Hanning pulse shape.
•  SA-Corr.Adjust: Adjustment to the nominal SA correction (in dB).
Click on any row to select a specific beam. The other information fields will now display data for the newly selected beam.