Use overlapping receiver spreads, see

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

. Shots should be positioned inside combined geophone layout (all overlapping spreads combined), and be distanced from first/last geophone position of whole profile by max. 1 station spacing (Header|Profile).

If shots are positioned 2 station spacings away from first/last profile receiver position then this will work most of the time but not always, depending on topography and subsurface geology.

We recommend using at least 24 receivers per spread and not only 12, for more reliable interpretation.

See also

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

topics "Station numbers and spread types" and
"Overlapping receiver spreads".

and sample tutorials

http://rayfract.com/tutorials/riveral8.pdf
http://rayfract.com/tutorials/EJEMPL3.pdf
http://rayfract.com/tutorials/tra9002.pdf

Ultima modifica di Rayfract; 07/04/2013 15:04.