[webservices] Unreadable file format for miniseed data from web services

[Bruce Weertman]

Alessia:

Could this be a problem with the merged data quality indicator in the miniseed. It defaults to "M" in ws-dataselect and ws-bulkdataselect.

Have you tried using "Q" or "R" or "D" which have been around for longer?

For example:
Try data from this query:
http://www.iris.edu/ws/dataselect/query?net=IU&sta=ANMO&loc=00&cha=BHZ&start=2010-02-27T06.30.00&end=2010-02-27T10.30.00&quality=Q&ref=direct

If that works, then the problem is mostly likely with incompatibility in qmerge - it can't handle the newer values.

BTW:
Here's an undocumented trick that you can do with the dataselect webservice
set ref=token instead of direct, get the token back and then pass it to the undocumented ws-msi webservice
(msi = miniseed inspector)

For example here's a sequence:

http://www.iris.edu/ws/dataselect/query?net=IU&sta=ANMO&loc=00&cha=BHZ&start=2010-02-27T06.30.00&end=2010-02-27T10.30.00&quality=Q&ref=token
this returns:
dataselect.1032b7cfd25a64e4d8d15cf019d1d056

Then pass that to msi like this:

http://www.iris.edu/ws/msi/query?token=dataselect.1032b7cfd25a64e4d8d15cf019d1d056

you can set the information level to 0, 1 or 2 like this:
http://www.iris.edu/ws/msi/query?token=dataselect.1032b7cfd25a64e4d8d15cf019d1d056&level=2

Cheers,
-Bruce


On Feb 15, 2011, at 8:38 AM, Alessia Maggi wrote:

> Dear Webservices people,
> 
> I am having difficulty reading the miniseed files obtained through webservices.  I have tried several methods of obtaining the data, from straight http requests, to the Perl client scripts, to wget requests on the bulkdataselect service...  
> 
> Every time, the miniseed files are incorrectly formatted, so qmerge and sdrsplit refuse to work:
> 
> e.g.
> 
> alessia at makalu:~$ qmerge -nv IU.ANMO.00.BHZ.2010.058.06.30.00.000-2010.058.10.30.00.000.miniseed
> Error: unrecognizable input file IU.ANMO.00.BHZ.2010.058.06.30.00.000-2010.058.10.30.00.000.miniseed
> 
> alessia at makalu:~$ sdrsplit -C IU.ANMO.00.BHZ.2010.058.06.30.00.000-2010.058.10.30.00.000.miniseed 
> unknown header type: -1
> 
> The files have an integer number of 4096 byte blocs, and seem to start with somewhat correct blocs (as far as I can tell using od -c)...
> 
> Do you have any ideas?  Any help would be gratefully received!
> 
> Alessia
> 
> PS: I attach an example of a miniseed file obtained by clicking on the following url from the http://www.iris.edu/ws/dataselect/ webpage
> 
>  http://www.iris.edu/ws/dataselect/query?net=IU&sta=ANMO&loc=00&cha=BHZ&start=2010-02-27T06:30:00.000&end=2010-02-27T10:30:00.000
> 
> 
> 
> 
> <IU-1.ANMO.00.BHZ.2010.058.06.30.00.000-2010.058.10.30.00.000.miniseed>_______________________________________________
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