I recommend exporting coordinates to .COR file format :

- select File|Export header data|Export Station Coordinates...
- click Save button to save to COORDS.COR file
- see our .pdf reference

http://rayfract.com/help/rayfract.pdf

chapter File formats on page 192 :

FILE FORMATS .................................................................................................................... 192
STATION COORDINATE FILES ................................................................................................. 192
SHOTPOINT COORDINATE FILES............................................................................................. 194
FIRST BREAK FILES ............................................................................................................... 197
ASCII.ASC FILES................................................................................................................. 199
.CSV LAYERED MODEL FILE .................................................................................................. 201
CONVERT .CSV LAYER MODEL TO SURFER .GRD LAYERED STARTING MODEL ......................... 202
.HDR BATCH FILE ................................................................................................................ 203
CONVERT SURFER .GRD FILE TO ASCII .TXT WITH X/Y/Z/VELOCITY FOR EACH GRID CELL ....... 206

Next e.g. import the COORDS.COR into Microsoft Excel and edit the x/y/z columns (columns 2/3/4). Leave column no. 1 (station no.) unchanged.

Next export in Excel to updated MYCOORDS.COR .

Now select our File|Update header data|Update Station Coordinates... and your updated MYCOORDS.COR .

Check updated coordinates in Header|Station .

We regard station z values when plotting the tomogram topography.

Our horizontal axis is "horizontal inline offset" from profile's first receiver.

Check option File|Export data Settings|Export horizontal inline offset and v0 to .COR .

Reexport updated coordinates to GOOD.COR .

Now open GOOD.COR e.g. with Windows Notepad editor . We list the "horizontal inline offset" in m in column no. 4 .

For layered refraction methods (Plus-Minus, Wavefront) we assume that receivers are planted at whole station numbers specified for the Spread type used to import your shots in File|Import Data .

For 2D WET inversion we regard the true x/y/z coordinates specified in Header|Station.