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special utilities

command: CALL <subfunction> <p1> <p2> ... <pN>

Special utilities for the user. The action depends on the <subfunction> keyword.

parameters

• <subfunction> parameter type: string
  Subfunction of utility. For possible values see table subfunction table below

subfunction table

subfunction	description
slowness	computes slowness in sec/deg for an event at <p2> deg distance and depth <p3> km. Uses travel time table set with command "FCT TT_TABLE <table-file>".
	<p1> string: phase (valid P or S) <p2> real: distance station-event in degrees <p3> real: depth of event in km <p4> symbol address: output variable (slowness)
travel	computes travel time in sec for an event at <p2> deg distance and depth <p3> km. Uses travel time table set with command "FCT TT_TABLE <table-file>".
	<p1> string: phase (valid P or S) <p2> real: distance station-event in degrees <p3> real: depth of event in km <p4> symbol address: output variable (travel time in sec)
locdiff	computes difference of two locations given in latitude and longitude (in deg).
	<p1> real: latitude of first location (in deg) <p2> real: longitude of first location (in deg) <p3> real: latitude of second location (in deg) <p4> real: longitude of second location (in deg) <p5> symbol address: output variable (distance in deg) <p6> symbol address: output variable (azimuth)
locadd	adds a distance vector of a specified length and direction to a given location
	<p1> real: latitude of input location (in deg) <p2> real: longitude of input location (in deg) <p3> real: length of distance vector (in deg) <p4> real: direction of distance vector (in deg) <p5> symbol address: output variable (new latitude in deg) <p6> symbol address: output variable (new longitude in deg)
statloc	returns station information
	<p1> string: station name <p2> symbol address: station latitude <p3> symbol address: station longitude <p4> symbol address: station relative x location <p5> symbol address: station relative y location <p6> symbol address: station elevation in km
phasediff	computes difference travel times of various phases generated at a discontinuity.
	<p1> string: phase; valid: S-P, Ppp-P, Pps-p, XS-P <p2> real: conversion depth in km <p3> real: slowness in (sec/deg) <p4> symbol address: output variable (time in sec)
inci	computes theoretical angle of incidence of P
	<p1> real: distance in deg <p2> real: depth in km <p3> symbol address: output variable (angle in deg)
random	generates uniform random number within a given interval.
	<p1> real: lo bound of interval <p2> real: hi bound of interval <p3> symbol address: output variable (random number)
grandom	generates normally distributed random number.
	<p1> real: center of gaussian <p2> real: half-width of gaussian <p3> symbol address: output variable (random number)

example

call slowness p ^distance(2) ^depth(2) &slo

computes P-slowness of second trace on display and stores result in variable "slo".