AtmRay (version 1.31)

P4X.lin_no_c: Find Ray Parameter for Distance

Description

Calculates ray parameter and azimuth of a ray that reaches some given point, using a 2-D iterative optimization search. Does not use compiled C code, so is slower, but in case of some bug in the C code, this function will still work.

Usage

P4X.lin_no_c(x, y, zs, zr, ATM = CheckAtm.lin(), maxerror = 3)

Arguments

x

Abscissa of receiver relative to source (m)

y

Ordinate of receiver relative to source (m)

zs

Elevation of source (m)

zr

Elevation of receiver (m)

ATM

Linear atmosphere

maxerror

Maximum permitted error for solution (m)

Value

p

ray parameter

az

azimuth

error

distance between inputs (x,y) and final position of result ray

Details

'maxerror' should be set with the necessary arrival time precision in mind. Smaller values of maxerror will produce more accurate arrival locations (and arrival times), but will require longer calculation times.

Examples

ATM = CheckAtm.lin()
P4X.lin_no_c(100, 100, 100, 00, ATM)
P4X.lin_no_c(100, 100, 100, 00, ATM, 0.01)