Benchmarks of forward modelling codes

A good accuracy of the simulated wavefields is of high importance in full waveform inversion. Therefore, benchmark tests were performed for a comparison of different methods.

Benchmark tests
Case	Scale	Tested algorithms
Layer with depth-dependent properties over homogeneous halfspace	Shallow seismic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM and Gemini
Homogeneous slow-velocity layer over homogeneous fast-velocity halfspace	Ultrasonic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM and Gemini
Homogeneous layer over homogeneous halfspace	Shallow seismic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM and Gemini
Homogeneous halfspace	Ultrasonic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM and Gemini
Homogeneous halfspace	Shallow seismic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM, Gemini and an analytic solution
Homogeneous fast-velocity layer over homogeneous slow-velocity halfspace	Ultrasonic data	This benchmark case was applied to the following programs: SOFI2D (transformed), SOFI3D, SPECFEM and Gemini