SC3-RAV™ 2011 - Baziw Consulting Engineers Ltd.

BCE SC3­RAV 2011 Seismic Data Analysis Software
The magnifying glass icons shown in Figure 31 allow the user to scale the seismic amplitudes in
10% increments. The legend
can be added and removed from the display by checking and un-
c hecking the Legend check box, respectively. The buttons and allow the user to
aled relative to the maximum amplitude
ithin the seismic profile. Placing a check and removing a check within checkbox Display Pref
pre-trigger data, respectively. It should be noted
when determining the Signal Decay Initial Time
The trend lines illustrated in
Figure 32 are specified by
pressing the middle mouse
button (or + right mouse
button or + left mouse
button) to identify individual
points of interest. SC1-RAV
then automatically draws a line
between the points specified
velocity
estimate 2 automatically either display or remove all the inputted data files from the graphical chart.
The user can display acceleration, velocity or displacement profiles by pressing the right mouse
button and selecting the desired particle motion as shown in Figure 31. When the traces are not
normalized, the peak particle accelerations (PPA), velocities (PPV) or displacements (PPD) are
displayed. In this mode, the seismic amplitudes are sc
w
trigger will result in the display and removal o
that Display Pre-trigger should be unchecked
Decay as outlined in Section 3.5.
and provides a
. Pressing options
+ left mouse button or
+ right mouse button
will delete the previously
specified trend line. Double
clicking the middle mouse
button will delete all the
specified trend lines. The user
can select speed button to
save estimated trend lin es in an
interval velocity file (see
Figure 32: Filtered (30 to 100Hz bandpass) seismic trace profile
Figure 9). As the user moves
illustrating reverse polarized waves and trend lines with
the cursor over individual
corresponding velocity estimates
traces, the corresponding file
name
of the seismic trace is displayed at the top centre of the chart. The user can re-filter the
se ismic files selected by enabling user interface button .
2 T
o obtain accurate interval arrival times utilizing the trend line specification, it is mandatory that the
investigator
selects the appropriate time index at the exact depth of the probe from which the seismic data
was
recorded (e.g., in Figure 32, the arrival time of 43.5 ms is specified at depth 2.7 m). Alternatively, if check
box
Enable Closest Depth is enabled the SC1-RAV software relates back to the closest data depth when
specifying trend lines.
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