SUMMARY

Launch a Matlab GUI for manipulating 3-component data.

SYNTAX

3C options

where options are one or more of:

{AUTO}
{A,T0,T1,T2,T3,T4,T5,T6,T7,T8,T9}
{WINLEN value}

DESCRIPTION

3c identifies all 3-component channel sets in the files currently in memory. These channel sets are copied into a Matlab workspace and a GUI is launched. Within this GUI the user may obtain estimates of back azimuth, incidence angle, and polarization, rotate traces, make 3-D particle motion plots, pick phase arrivals, and do polarization analysis using maximum likelihood estimators. Back azimuth, incidence angle, and polarization estimates are returned in the SAC header variables USER0 (KUSER0), USER1 (KUSER1), and USER2 (KUSER2). Picks are returned in T0 - T9 (KT0 - KT9). Instructions for using the GUI are available through a built-in help system in the GUI.

When the AUTO option is specified, 3c does the polarization analysis without intervention using a window starting at the specified time marker {A,T0,T1,T2,T3,T4,T5,T6,T7,T8,T9}, and a window length of WINLEN.

HEADER CHANGES

USER0, KUSER0, USER1, KUSER1, USER2, KUSER2, T0 - T9, KT0 - KT9

ERROR MESSAGES

No 3-component sets found.

LATEST REVISION

June 5, 1997 (Version 00.53a)