The package of direct joint inversion for 3-D isotropic Vsv perturbation and azimuthal anisotropy without conventional tomography.
Please check the manual in ./doc for usage.
Reference: Liu, C., Yao, H., Yang, H.‐Y., Shen, W., Fang, H., Hu, S., & Qiao, L. (2019). Direct inversion for three‐dimensional shear wave speed azimuthal anisotropy based on surface wave ray tracing: Methodology and application to Yunnan, southwest China. Journal of Geophysical Research: Solid Earth, 124. https://doi.org/10.1029/2018JB016920