<div> Hi,<br>
<br>
I use SAC to remove the instrument response,<br>
SAC>transfer from polezoro subtype response.pz to none freqlimits 0.01 0.02 5.0 8.0<br>
the following is the content of response.pz<br>
*******************************<br>
<pre>POLES 5</pre>
<font color="#000000" face="helvetica"><strong></strong></font>
<table border="0" cellspacing="3" width="100%">
<tbody><tr><td valign="top" width="25%">-0.03701</td>
<td valign="top" width="25%">+0.03701</td>
<td><br>
</td>
<td><br>
</td>
</tr>
<tr>
<td valign="top" width="25%">-0.03701</td>
<td valign="top" width="25%">-0.03701</td>
<td><br>
</td>
<td><br>
</td>
</tr>
<tr>
<td valign="top">-1131.0</td>
<td valign="top">0.0000</td>
<td><br>
</td>
<td><br>
</td>
</tr>
<tr>
<td valign="top" width="25%">-1005.0</td>
<td valign="top" width="25%">0.0000</td>
<td><br>
</td>
<td><br>
</td>
</tr>
<tr>
<td valign="top" width="25%">-502.7</td>
<td valign="top" width="25%">0.0000</td></tr></tbody>
</table>
ZEROS 2
<table border="0" cellspacing="3" width="100%">
<tbody><tr><td valign="top" width="25%">0.0000</td>
<td valign="top" width="25%">0.0000</td>
<td><br>
</td>
<td><br>
</td>
</tr>
<tr>
<td valign="top" width="25%">0.0000</td>
<td valign="top" width="25%">0.0000<br>
</td></tr></tbody>
</table>
CONSTANT ????<br>
*******************************<br>
<br>
But I don't know how to calculate the constant.<br>
<font><font color="#000000" face="helvetica"><strong></strong></font></font><font color="#000000" face="helvetica"><br>
I got the calibration sheet from Gurapl. The normalization factor at 1Hz is 2304000.<br>
</font><font color="#000000" face="helvetica">The sensivity is 1500</font><font><font color="#000000" face="helvetica">V/m/s</font></font><font color="#000000" face="helvetica">. <br>
<br>
I convert the unit from Hz to rad/s and re-calculate the </font><font color="#000000" face="helvetica">normalization factor:<br>
<br>
1500*2304000*(2*pi)^(5-2)=8.5726e+011<br>
<br>
I don't know whether I should multiply the AD convert factor of the digitizer or not.<br>
the digitizer is REFTEK 130, and the </font><font color="#000000" face="helvetica">AD convert factor is 1.588e-06 v/conts.<br>
<br>
If I </font><font color="#000000" face="helvetica">multiply the AD convert factor, I got a new result.<br>
<br>
</font><font color="#000000" face="helvetica">(1.588e-06)*</font><font color="#000000" face="helvetica">1500*2304000*(2*pi)^(5-2)=1.3613e+006<br>
<br>
I want to ask which CONSTANT I shoud use? </font><font color="#000000" face="helvetica">8.5726e+011 or </font><font color="#000000" face="helvetica">1.3613e+006?<br>
<br>
Please help me!<br>
</font><font color="#000000" face="helvetica"><br>
</font><font color="#000000" face="helvetica"><br>
<br>
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