SUMMARY

Marks files with travel times from a velocity set.

SYNTAX

MARKTIMES {TO marker},{DISTANCE HEADER|v},
    {ORIGIN HEADER|v|GMT time},{VELOCITIES v ...}

INPUT

TO marker:	Define the first time marker in the header to store results. The time markers are incremented for each requested velocity.
marker:	T0|T1|T2|T3|T4|T5|T6|T7|T8|T9
DISTANCE HEADER:
	Use the distance (DIST) from the header in the travel time calculations.
DISTANCE v:	Use v as the distance in the travel time calculations.
ORIGIN HEADER:	Use the origin time (O) in the header in the travel time calculations.
ORIGIN v:	Use v as the offset origin time.
ORIGIN GMT time:
	Use the Greenwich mean time time as the origin time.
time:	Greenwich mean time in the form of six integers: year, julian day, hour, minute, second, and millisecond.
VELOCITIES v ...:
	Set the velocity set to use in the travel time calculations. Up to 10 velocities may be entered.

ALTERNATE FORMS

UTC for Universal Time Coordinate may be used instead of GMT.

DEFAULT VALUES

MARKTIMES VELOCITIES 2. 3. 4. 5. 6.  DISTANCE HEADER ORIGIN HEADER TO T0

DESCRIPTION

This command marks travel travel times in the header, given the origin time of the event, the epicentral distance, and an input velocity set. The following simple equation is used to estimate travel times.:

time(j) = origin + distance/velocity(j)

The results are written into the header in the requested time marker.

EXAMPLES

To use the default velocity set but force the distance to be 340 kilometers and the first marker to be T4:

SAC> MARKTIMES DISTANCE 340. TO T4

To select a different velocity set:

SAC> MARKT V 3.5 4.0 4.5 5.0 5.5

To set the origin time in GMT and store the results in T2:

SAC> MARKT ORIGIN GMT 1984 231 12 43 17 237 TO T2

HEADER CHANGES

Tn, KTn

LATEST REVISION

May 15, 1987 (Version 10.2)