Last modified 16 years ago Last modified on 06/02/2008 11:15:53 AM

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azimuth vespagram

command: VESPA_AZ <az1> <az2> <azstep> <slowness> <power>

Computes vespagram from all traces of the display. For each azimuth value from <az1> to <az2> in steps of <azsteps> a beam trace is computed (using slowness <slowness>). On the summation the <power>-th root process is applied. <power>=1 means plain summation. The input traces are hidden after execution of this procedure. To get them back, enter the command "DISPLAY h:all". Each output trace corresponds to an azimuth value. The azimuth value is given in the "comment"-entry of the trace. It is convenient to switch the trace info text to "comment" by the command "TRCTXT ^comment($x)".


  • <az1>, <az2> parameter type: real
    Azimuth window. Units in degress.
  • <azstep> parameter type: real
    Step size within azimuth window. Unit in degress.
  • <slowness> parameter type: real
    Beam slowness in deg/sec.
  • <power> parameter type: real
    Before each summation the <power>-th root of the input traces is computed. The result trace is then taken to the <power>-th power.


vespa_az 30.0 50.0 1. 6.3 1.
usual vespagram (plain summation)
vespa_az 30.0 50.0 1. 6.3 4.
4-th root process on each summation

commands used