input list:
para.in                         - parameter file
MODVs.true                      - input true Vsv model (same as MOD)
MODGs.true						- input true Gs model (does not contains the boundary points); Gs/L (dimensionless)
MODGc.true						- input true Gc mdoel
Surfphase_RV3_5_40s_1s.dat      - blank traveltime data file, only paths are useful

output list:
surfphase_forward_RV3th.dat     - predicated raypath data file (main output, used in follow-up inversion.)
period_Azm_tomo.real            - predicated Rayleigh wave phase velocity map with anisotropy