path4sl {Rvelslant}R Documentation

Snell's Law Raypath

Description

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

Usage

path4sl(z, d2bot, vel, hoffset)

Arguments

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.

Value

returns the array of angles of incidence for the Snell's Law raypath.

Author(s)

Eric M. Thompson <eric.thompson@tufts.edu>

See Also

thetamatrix

Examples

# Used internally by thetamatrix()


[Package Rvelslant version 0.2-3 Index]