[SAC-HELP] how to use sac function synchronize effectively

[Onur Tan]

Hi,

You can change the time info in header with chnhdr.
the SAC can change the relative time (in seconds) of the data.

see the description part of the manual
http://www.iris.edu/software/sac/commands/chnhdr.html

Onur

Dr. Onur TAN
----------------------------------------------   40.7866N 29.4500E ---------
 TÜBİTAK Marmara Araştırma Merkezi,  Yer ve Deniz Bilimleri Enstitüsü
 TUBITAK Marmara Research Center, Earth and Marine Sciences Institute
 Gebze - Kocaeli - TURKEY


On 21.03.2011 15:47, "Shutian Ma" <shutian33 at yahoo.ca> wrote:



Dear colleagues,

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.
Could you tell me how to use the synchronize function effectively?
Do you have another way to make all the records generated by the same earthquake have the same start time?
Thanks in advance,
Shutian

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