GSSI 200 HS, Руководство пользователя

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Geophysical Survey Systems, Inc. GS Series
200 HS Antenna
MN27-151 Rev A 16
o
For Collect Mode – Distance and Point, set this as high as possible. The higher this number
is, the faster you can survey.
• Scan Density
o For Collect Mode – Distance, this is your horizontal data density. A good starting value is 12
scans/ft or 50 scans/m.
o
For Collect Mode – Point, this will control your horizontal scale display. It’s not required but
if you are aware of how far you will move the antenna each time, you can set this to display
the horizontal scale accurately.
• Scans/Point
o
For Collect Mode – Point only. The higher this value is, the cleaner your data will be. Higher
values will also slow down your data collection speed. A good starting point is 512
samples/point.
In the Filters Area
Low Pass/High Pass Filters -
These filters are crucial
to obtaining good data in the field. The receiver will
record anything in the frequency range of radiation that
it encounters. What we are doing here is filtering out
anything
outside the range we are concerned with. For
the 200MHz antenna, this is around 50 – 600MHz. The
High Pass is the lower bar and the Low Pass is the
higher bar.
Stacking -
This is optional. It can help reduce the
amount of fuzz at the bottom of the screen. If you decide
to use it, smaller values are crucial. 3-11 scans is our
recommendation. Higher values can average out your
targets of interest.
Backgr(ound) Removal -
This is also optional, but it can have a profound impact on external low-
frequency noise and may improve viewing targets in high dielectric, wet, and/or conductive materials.
This filter removes anything in the scan that appears for
more than the value input at the same time and
amplitude. External low-frequency noise often manifests as horizontal banding, and conductive materials
can produce a fair amount of ringing or horizontal banding. This filter would remove those bands to show
what may be hidden behind them. Larger values are safer, so we recommend 100-200 scans at least. A
good rule of thumb is to set this filter to a value greater than your target length times your scans/ft or
meter.
Noise Band Removal
- This is also optional. Enabling this filter applies a smart background removal
that is weighted to remove banding while minimally impacting hyperbolic features. In other words, it
removes less amplitude from your hyperbolas.