Abstract:Near surface velocity structure and high-densi-ty structure profiles can be built by inverting thedispersion curve extracted from the Rayleigh-wavein seismic shot gathers. The accurate extraction ofRayleigh-wave dispersion curve can ensure the ac-curacy near surface structure inversion. However,spatial abasing will affect dispersion curve extrac-tion and the inversion of dispersion curve becauseof large receiver intervals in seismic shot gathers.Using a theoretical model,we find that the spatialabasing causes high frequency information lack onthe dispersion curve by large receiver intervals.Wealso find that high frequency dispersion curve ismore sensitive to shear wave velocity of shallowlayers. The joint inversion with the isopath layeredand damped least squares is applied on both syn-thetic model and real data with different receiverintervals.Both of the tests demonstrate that thehigh frequency lack on dispersion curve increasesthe relative error of inversion, and harms the in-version stability due to the spatial abasing.