An alternative option would be to convert the SEISAN file to ASCII using
SEIASC, and then back to SEISAN or mSEED format as required.
G Suresh
On Friday 25 October, 2024 at 12:29:47 pm IST, [email protected]
<[email protected]> wrote:
Today's Topics:
1. Re: problem reading very old data (Jens Havskov)
2. Re: problem reading very old data (Richard Luckett - BGS)
----------------------------------------------------------------------
Message: 1
Date: Thu, 24 Oct 2024 12:35:15 +0000
From: Jens Havskov <[email protected]>
Subject: Re: [seisan] problem reading very old data
To: Richard Luckett - BGS <[email protected]>, "[email protected]"
<[email protected]>, Lars Ottemöller <[email protected]>
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] <[email protected]> on behalf of
Richard Luckett - BGS <[email protected]>
Sent: Thursday, October 24, 2024 11:35 AM
To: [email protected] <[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.
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Message: 2
Date: Fri, 25 Oct 2024 06:59:27 +0000
From: Richard Luckett - BGS <[email protected]>
Subject: Re: [seisan] problem reading very old data
To: Jens Havskov <[email protected]>, "[email protected]"
<[email protected]>, Lars Ottemöller <[email protected]>
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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