| OpendTect User Documentation version 4.2 |
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Pre-stack gathers can be displayed in the 3D scene, perpendicular to an inline or crossline. Post stack data must first be displayed on an inline/crossline. The post-stack data does not need to be linked to your pre-stack data. Once you have loaded the line, go to interact mode (graphical toolbar, second icon from the left), right-click in the scene on top of your inline and use the option "Display PS gather". The menu will list any pre-stack data available (loaded) in the survey. Please note that you can display multiple PS gathers on the same inline, and moving the inline to another position will keep the position of the PS gather, as well as update its content.
PS-gather Positioning
When a pre-stack data is displayed in a scene, the pre-stack positioning window also pop-ups. By using this window, the pre-stack data can be scrolled interactively. The crossline value locates the present displayed prestack panel. That can be scrolled at given steps (increment).
From the PS gather display, within the 3D window, you can also display this gather in a 2D viewer. Once again, in interact mode, right-click on top of the PS gather and use the option "View in 2D Panel".
PS-gather Properties
There are several Pre-stack properties available that are described below:
Note: Please note that the PS gathers are first displayed without any processing. This can be set together with other properties in the PS gather display properties:
- Shape: The shape tab will set the size of the PS gather with respect to other 3D elements.
- Appearance: Color bar and amplitude ranges can be set in the color tab.
- Scaling: This tab is used to scale (clip) the amplitude spectrum of the displayed pre-stack data.
- Preprocessing: Pre-processing may be applied to enhance the display in the third tab. The available algorithms are presented in the prestack processing chapter.
