How do I create "fake" source and receiver headers from offset values?
Use the following approach to calculate artificial source and receiver headers that are consistent with the trace offset value.
- Create a Header Maths process.
- Select the gathers volume.
- Click the "+" button in the Formulae section to add a formula.
For offset values in the same units as the X/Y coordinates (i.e. metres to metres, feet to feet), use:
![](https://media.screensteps.com/image_assets/assets/003/265/437/original/7c2baaf9-e50c-4c32-90e8-4d04a97bd3e0.png)
A unit conversion can also be applied. For offset values in feet and X/Y coordinates in metres, use:
![](https://media.screensteps.com/image_assets/assets/003/265/436/original/b71aff97-f860-4e62-b7cc-4d1e43e5c12a.png)