path4sl {Rvelslant} | R Documentation |
Calculates the array of angles of incidence for the raypath that is constrained by Snell's Law.
This function is based on the FORTRAN subroutine path4sl
by
David Boore <boore@usgs.gov>
U.S. Geological Survey
Mail Stop 977
345 Middlefield Road
Menlo Park, CA 94025 USA
path4sl(z, d2bot, vel, hoffset)
z |
array of depth to each travel time measurement. |
d2bot |
array of depth to bottom of layer interfaces. |
vel |
array of velocities for each layer. |
hoffset |
horizontal offset from borehole at surface. |
returns the array of angles of incidence for the Snell's Law raypath.
Eric M. Thompson <eric.thompson@tufts.edu>
# Used internally by thetamatrix()