1. Introduction

Home: https://www.sandia.gov/geotess/

Documentation: https://www.sandia.gov/geotess/geotess-documentation.html

2. Reference

Ballard, S., J. R. Hipp and C. J. Young. (2009). Efficient and Accurate Calculation of Ray Theory Seismic Travel Time through Variable Resolution 3D Earth Models. Seismological Research Letters. 80. 989-999. https://doi.org/10.1785/gssrl.80.6.989