[webservices] dataselect wrong data returned to multithreaded client

[Anthony Lomax]

Hi all,

I see a possibly related problem with channel inclination.  The 
following request should return a BHZ channel, but the component 
inclination in the sac header is 90.0 - my understanding from the SAC 
manual is that this should be 0.0 for Z component UP:

CMPINC     F     Component incident angle (degrees from vertical).

http://www.iris.edu/ws/timeseries/query?net=IU&sta=MAKZ&loc=00&cha=BHZ&start=2012-07-17T07:28:26.02&dur=844&output=sacbl

Part of the sac header.

CMPAZ = 0.0
CMPINC = 90.0
KSTNM = MAKZ
KCMPNM = BHZ
KNETWK = IU

Thanks,

Anthony


On 2012/07/16 22:29, Philip Crotwell wrote:
> Hi
>
> I have been doing some tests with the dataselect web service from a
> multithreaded client (SOD) and found that occasionally I would get
> data records back in one thread that were not the channel asked for.
> Luckily I had a check in place from some earlier issues that compared
> the channel codes in the request with those in the result. Here is an
> example. It appears that the thread that requested data from BORG got
> data from ARU.
>
>
> 2012-07-16 15:51:26,794 - Channel id in returned seismogram doesn not
> match channelid in request.
> req=II.1986-01-01T00:00:00.000GMT.BORG.00.BHZ.2003-08-29T00:00:00.000GMT
> seis=II.1986-01-01T00:00:00.000GMT.ARU.00.BHZ.2003-08-29T00:00:00.000GMT
>
> The request, if it helps, was
> net=II&sta=BORG&loc=00&cha=BHZ&start=2009-05-16T01:08:44&end=2009-05-16T01:26:26
>
> This is a bit scary as I suspect many clients do not check the
> returned data to make sure it actually corresponds to their original
> request. I have not seen this with a single threaded client, so
> perhaps that is a clue.
>
> I will try to do some more testing and see if I can provide any more details.
>
> thanks,
> Philip
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>

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