Thread: Metadata requests for older miniseed volumes fails, perhaps due to changes in location codes

On Nov 22, 2021, at 7:47 AM, Anthony Lomax (via IRIS) <webservices-bounce<at>lists.ds.iris.edu> wrote:

Hello

I have 10+ years of miniseed volumes with event data from IRIS Wilbur.
I have automated procedures to obtain station/channel gain and coordinate metadata based on the NetStaLocChan identifiers in the miniseed.
These procedures fail to get results from service.iris.edu/fdsnws for some stations/channels, for example:
http://service.iris.edu/fdsnws/station/1/query?net=IU&sta=KMBO&loc=--&cha=BHZ&starttime=1999-08-17&endtime=1999-08-17&level=channel

I think that the problem is that at some time in the past few years the location codes for the stations were changed, for example the channel above now shows up in MDA as:
<5xMCeLN1GJNMyhyz.png>
http://ds.iris.edu/mda/IU/KMBO/?starttime=1995-09-17&endtime=2599-12-31

so the old location "--" (from 2011) is now either 00 or 10.

Is there any procedure or work-around to get metadata for a channel as it was identified in the past?

Thanks,

Anthony

PS - The relevant miniseed obtained with Wilbur in 2011 is here: https://www.dropbox.com/s/rbwljtguzvx5an8/Turkey_1999.mseed?dl=0


--
Sent from my iClayTablet


Anthony Lomax
www.alomax.net http://www.alomax.net/
Twitter: @ALomaxNet

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