used for the SSP</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;


        'P' Pseudo-Gaussian</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
'R'
Ricker


        wavelet</p>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
'A'
Approximate


 