<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">If you want to recover the zero padded "whole" trace you could use the OMARKER header. It's the length of time missing from the sac trace that you download from IRIS. For example, you might be able to use something like the following macro -- adds zeros from the origin time to the starting point of your trace using cuterr fillz. I am guessing this will automatically adjust your start time but please double check and modify as needed.<br><br>DO FILE WILD *.BHZ.R.SAC*<br> READ $FILE<br> SETBB OMKR &1,OMARKER<br> GETBB OMKR<br><br> xlim T0 -10 10<br> p<br> CUT ON<br> CUTERR FILLZ<br> CUT b %OMKR e<br> READ $FILE<br> WRITE OVER<br>ENDDO<br>CUT OFF<br><br><div style="color: rgb(162, 162, 162);"><font class="Apple-style-span" face="'bookman old style', 'new york', times, serif"
size="1"><b><i>_______________</i></b></font></div><div style="color: rgb(162, 162, 162);"><strong><font class="Apple-style-span" face="'bookman old style', 'new york', times, serif" size="1"><font style="font-style: italic;">Serenity isn't freedom from the storm, but peace within the storm</font><br></font></strong></div> <div style="color: rgb(162, 162, 162);"><font face="'bookman old style', 'new york', times, serif" size="1"><strong>Januka Attanayake </strong></font></div> <div style="color: rgb(162, 162, 162);"><font class="Apple-style-span" face="'bookman old style', 'new york', times, serif" size="1"><strong>Global Seismology & Economics<br>The University of Connecticut <br>Beach Hall - U2045<br>354, Mansfield Rd; <br>Storrs, CT 06269<br></strong><strong style="font-weight: bold;">Tel : 860 486 0475 (Office)<br> </strong><strong style="font-weight: bold;"> 860 486 3914 (Lab -
P405)<br></strong></font></div> <div style="color: rgb(134, 135, 164);"><font face="'bookman old style', 'new york', times, serif" size="1"><span style="color: rgb(139, 139, 139); font-weight: bold;"><font class="Apple-style-span">URL: </font><a rel="nofollow" target="_blank" href="http://sites.google.com/site/janukaattanayake/"><font class="Apple-style-span">http://sites.google.com/site/janukaattanayake/</font></a></span></font><div style="font-family: times,serif;"><font class="Apple-style-span" color="#a2a2a2"><br></font><br><br><br><br></div></div><br><br>--- On <b>Mon, 3/21/11, Shutian Ma <i><shutian33@yahoo.ca></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Shutian Ma <shutian33@yahoo.ca><br>Subject: [SAC-HELP] how to use sac function synchronize effectively<br>To: sac-help@iris.washington.edu<br>Date: Monday, March 21, 2011, 9:47 AM<br><br><div
class="plainMail"><br>Dear colleagues,<br><br>Recently we transferred some waveform records from IRIS. These records generated by the same earthquake do not have the same start time. As we need all the records generated by the same earthquake have the same start time to make measurement we tried to use sac2000 function synchronize. After we used the function and used lh we found all the ktime? are same. When we display those waveform records processed by the function synchronize, we found the original start times are still kept.<br>Could you tell me how to use the synchronize function effectively?<br>Do you have another way to make all the records generated by the same earthquake have the same start time?<br>Thanks in advance,<br>Shutian <br><br>_______________________________________________<br>sac-help mailing list<br><a ymailto="mailto:sac-help@iris.washington.edu"
href="/mc/compose?to=sac-help@iris.washington.edu">sac-help@iris.washington.edu</a><br><a href="http://www.iris.washington.edu/mailman/listinfo/sac-help" target="_blank">http://www.iris.washington.edu/mailman/listinfo/sac-help</a><br></div></blockquote></td></tr></table><br>