Supervirtual Refraction Interferometry in the Radon Domain

Accurate picking of seismic first arrivals is very important for arrival travel time tomography, but the appearing at far offsets are often more difficult to pick accurately due low signal-to-noise ratio (SNR). The conventional supervirtual refraction interferometry (SVI) method can improve SNR a certain extent; however, it not suitable data that interfered by strong noise. In order better process with serious noise interference, we propose modified method, in which SVI implemented Radon domain (RDSVI) cross-correlation have effect. According kinematic characteristics refractions, performed linear domain. Both synthetic and field demonstrate proposed enhance effective signal attenuate simultaneously, so as significantly data. Meanwhile, RDSVI tested on missing traces, proves this overcome influence abnormal traces reconstruction sparsely sampled