Gemini 620pd Profiling, Руководство по эксплуатации продукта

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Gemini Software Operation Gemini Profiling System
0695-SOM-00001, Issue: 03
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© Tritech International Ltd.
12.3.11. Sound Velocity Indicator
The sound velocity indicator at the upper right hand side of the display shows the
sound velocity used by the Gemini Profiler whilst producing the sonar image. The
Gemini Sonar can use a fixed, user-entered, value for the sound velocity or an
externally measured velocity from a Sound Velocity Probe (SVP). The SVP can be
connected through the Gemini Profiler Auxiliary port, any serial port on the Gemini
Hub or any serial port on the host computer.
12.3.12. Palette Selector
The Gemini software is supplied with a number of palettes which are used to show
the different intensities in the sonar image in different colours. The palette bar on the
left hand side of the screen shows the mapping currently being used.
Clicking on the palette bar opens a palette selector which allows the selection of the
palette to use. As the mouse is hovered over the different palettes, the sonar image
will preview that palette.
Note
A contrasting colour scheme should be chosen for the image palette and
targets (see Section 12.4.9, “Digitisation”) in order to be able to see the
digitised points clearly.
12.3.13. Gain Assist
By default this is turned on as indicated by green text. When turned on the Gemini
will automatically reduce a high gain setting on range lines where bright targets are
observed. This improves the clarity of the target, but can give the effect of dark bands
in the background image. When turned off the Gemini will always use the gain slider
setting. If bright targets are observed and a high gain setting is used, the target will
appear to spread out in the displayed image.