Assuming a model velocity structure 
is known and the source
location 
is specified, it is possible to simulate
a sequence of shot records. These individual shot records
are recorded as data 
and processed like field data.
The geometry of the source location, the receiver separation, and the number of receivers used depends on a number of factors. Close sample spacing in the seismic experiment provides better data quality and improves the signal to noise ratio. The subsurface structure scatters energy in different directions. If the structure has significant dip then long receiver spreads are used. The cost of shots and drill holes also influences the geometry of seismic data collection.
