[webservices] irisFetch and SCEC data center - problem with data conversion?

[Chad Trabant]

Hi Shahar,

The miniSEED returned from the SDEDC's service is encoded in little-endian byte order using Steim-1 compression.  This is not allowed by the SEED standard.  While some miniSEED software will read such data, invalid as it is, the IRIS-WS Java library (used by irisFetch.m) does not support it.

I suggest taking this issue up with SCEDC.

regards,
Chad

> On Jul 22, 2015, at 3:03 PM, Shahar Barak <shaharb at stanford.edu> wrote:
> 
> Hi,
> 
> Data seems to be corrupted when using irisFetch and the SCEC data center. Below is a plot of the same data downloaded via irisFetch from the IRIS data center (top) and from the SCEC data center (bottom) (script attached). The data looks fine and seems visually identical when I download the mseed files directly via the web service (not using irisFetch):
> http://service.iris.edu/fdsnws/dataselect/1/query?net=CI&sta=BAR&cha=BHZ&loc=--&start=2013-03-10T22:51:50.000&end=2013-03-10T23:51:50.000 <http://service.iris.edu/fdsnws/dataselect/1/query?net=CI&sta=BAR&cha=BHZ&loc=--&start=2013-03-10T22:51:50.000&end=2013-03-10T23:51:50.000>
> http://service.scedc.caltech.edu/fdsnws/dataselect/1/query?net=CI&sta=BAR&cha=BHZ&loc=--&start=2013-03-10T22:51:50.000&end=2013-03-10T23:51:50.000 <http://service.scedc.caltech.edu/fdsnws/dataselect/1/query?net=CI&sta=BAR&cha=BHZ&loc=--&start=2013-03-10T22:51:50.000&end=2013-03-10T23:51:50.000>
> 
> Help anyone? Did I do something wrong?
> 
> Thanks!
> 
> Shahar
> 
> 
> <SB_testFetch.m>_______________________________________________
> webservices mailing list
> webservices at iris.washington.edu
> http://www.iris.washington.edu/mailman/listinfo/webservices

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.iris.washington.edu/pipermail/webservices/attachments/20150722/6a85df42/attachment.html>