Thank you, Jens, I was looking in libmseed.c. Not immediately obvious where the epoch is used but al least that comment explicitly says what the epoch is. I'll find it.
Richard From: Jens Havskov <[email protected]> Sent: 24 October 2024 13:35 To: Richard Luckett - BGS <[email protected]>; [email protected]; Lars Ottemöller <[email protected]> Subject: Re: problem reading very old data richard In seismseed.c (reading routine for mseed) times are calculated from 1970 so it might be there. I am no familiar with c so to start with I hope somebody else can fix it. jens ________________________________ From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> on behalf of Richard Luckett - BGS <[email protected]<mailto:[email protected]>> Sent: Thursday, October 24, 2024 11:35 AM To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Subject: [seisan] problem reading very old data Hi, I'm doing a project digitising old paper seismograms and have hit a weird issue with mulplt. When reading in a mseed file with a year prior to 1970 mulplt just stops at the stage it should open the waveview window. I can look at the data by altering the header to be a later year. 1969 fails 1971 opens. This is a mseed problem - I can use wavetool to convert to SEISAN and open the resulting file fine. Unfortunately I need mseed for storage as there are gaps in the data every minute where the minute marks on the record are. I've had a look at the code but the only epoch I can find is 1900 - any ideas of where to look for the solution to this would be very welcome. Thank you, Richard. This email and any attachments are intended solely for the use of the named recipients. If you are not the intended recipient you must not use, disclose, copy or distribute this email or any of its attachments and should notify the sender immediately and delete this email from your system. UK Research and Innovation (UKRI) has taken every reasonable precaution to minimise risk of this email or any attachments containing viruses or malware but the recipient should carry out its own virus and malware checks before opening the attachments. UKRI does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses. [External email] Make sure you recognize the sender's email address before you click links, open attachments, or get involved in financial transactions. Contact IT-support BRITA if you have any questions.
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