GSSI 200 HS, Руководство пользователя

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Geophysical Survey Systems, Inc. GS Series
200 HS Antenna
MN27-151 Rev A 13
Auto Gain:
With auto gain turned on, the software will configure the necessary gain values automatically
based on where the antenna is placed. You will want to make sure that the system is setting gains in an
area of representative conditions.
# of Points:
You can set any number of gain points from 1-8. These will be evenly distributed along the
time scale. If 1 gain point is specified, it will be located at the top of the scan trace.
Current Point #:
This option is only visible if auto gain is turned off. If you wish to manually change the
gain value associated with a single point, select that point using this control.
Gain Value:
This option is only visible if auto gain is turned off. Changing this will change the amount
of gain applied at the currently selected point. A higher value will increase gain and brighten the region
around that gain point.
Adaptive Gain:
GSSI has developed a gain compensation algorithm that is designed to more accurately
counteract attenuation. This is done by taking ground conductivity and dielectric into account. This will
help accentuate a certain type of target with contrasting attributes from the surrounding material. For
example, a clay lens in sand may be much easier to detect with this gaining method. You will need to
specify a reasonably accurate dielectric in the scan menu for the material, and a close approximation of
the material’s conductivity value.
Control Bar
Once you select the antenna or open a previously recorded file in the collect/playback screen, you will see
the control bar appear along the bottom edge. It contains software buttons for various control functions
that you will access while collecting or reviewing data.
The Back Arrow:
Tapping this will return you to the collect/playback screen. This is not available while
you are actively collecting data.
Contrast:
Tapping this will show the display gain and color table controls.
Shallow, level, and deep will manipulate the display gain while color table,
stretch, and slide deal with the color mapping of phase and amplitude values.
Tapping Contrast again while open will hide the menu.
• Level:
This control will increase (brighten) or decrease (dim) the display
gain in increments of 3 dB. Changes here will apply to the entire vertical
scale. Changes to the display gain level are not saved with the DZX file and
are for display purposes only.
• Shallow/Deep:
These control the display gain for the top or bottom 50% of
the time range only. They are useful if you want to brighten/dim only the top
or bottom half of your data.
• Color Table:
Use the carousel wheel or +/- buttons to select from 31
different color tables. The color distribution is shown in the color bar above
the numerical selector. Positive amplitudes will be assigned the color on the
right, negative on the left, and zero amplitude will be at the center.
• Stretch:
This control allows you to use a single color palette to accentuate
different portions of the amplitude scale. Setting this to 1 will compress
more colors near to zero amplitude which will accentuate weaker reflections.
A setting of -1 will compress color values at the positive and negative
extremes and show more differentiation for higher amplitude reflections.