Sensors & Software pulseEKKO Product Manual page 164

Collecting Data
7.1.13 Collecting Data in CMP/WARR modes
To properly set up the parameters for a CMP survey, see Section 6.2.1. In the data acquisition
screen, the parameters for the data collection are initially displayed in the left of the window. The
right side of the window displays a graphic showing the initial antenna separation and the current
positions of the transmitting and receiving antennas.
Figure 7-23: Collecting line data in a CMP survey
Press Start to begin collecting data, then press the Bluetooth remote or the DVL keypad buttons
to fire the transmitter. As each trace is collected, the transmitting and receiving antenna positions
update; move the antennas accordingly and fire the transmitter again. Repeat this process until
your CMP survey is completed. Note that for a CMP survey, Interps are not available.
If a CMP is done correctly over a constant subsurface reflecting layer, you should see an image
similar to the one in Figure 7-24. The result of the antenna move-out is a curve which should
allow you to determine velocity.
The horizontal axis displays total antenna separation. In Figure 7-24, the antenna separation is
17' from the starting position, giving a total cross-section distance of 34'.
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