Rquake (version 2.5-1)

GETpsTT: Get Pand S travel times and derivatives

Description

Get Pand S travel times and derivatives

Usage

GETpsTT(phase, eqz = 6, staz = 0, delx = 1, dely = 1, deltadis = 6, vel)

Value

list:

TT

travel time vector

Derivs

matrix of derivatives, dtdx, dtdy, dtdz

Arguments

phase

character vector, phase

eqz

event depth

staz

station elevation

delx

km, delta X

dely

km, delta Y

deltadis

km, distance

vel

velocity models (P and S)

Author

Jonathan M. Lees<[e-mail]>

Details

Creates a vector of travel times, and a matrix and derivatives used for inversion.

See Also

many.time1D

Examples

library(RSEIS)
library(GEOmap)


data(GH, package='RSEIS')

data(VELMOD1D, package='RSEIS')
vel = VELMOD1D


p1 = GH$pickfile$STAS


loc = GH$pickfile$LOC


proj  = GEOmap::setPROJ(type = 2, LAT0 =loc$lat, LON0 =  loc$lon)


XYsta = GEOmap::GLOB.XY(p1$lat, p1$lon, proj)
XYq =   GEOmap::GLOB.XY(loc$lat, loc$lon, proj)

delx = XYq$x-XYsta$x
dely = XYq$y-XYsta$y
dists = sqrt(delx^2+dely^2)

G1 = GETpsTT(p1$phase, eqz=loc$z, staz=0, delx=delx, dely=dely,  deltadis=dists , vel)