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Hi all,<br>
<br>
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:<br>
<br>
CMPINC F Component incident angle (degrees from vertical).<br>
<br>
<a class="moz-txt-link-freetext" href="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">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</a><br>
<br>
Part of the sac header.<br>
<br>
CMPAZ = 0.0<br>
CMPINC = 90.0<br>
KSTNM = MAKZ<br>
KCMPNM = BHZ<br>
KNETWK = IU<br>
<br>
Thanks,<br>
<br>
Anthony<br>
<br>
<br>
<div class="moz-cite-prefix">On 2012/07/16 22:29, Philip Crotwell
wrote:<br>
</div>
<blockquote
cite="mid:CAGFrVcWDrxib5AA4RNentewUzA0XQayo+GmJVCu4ToCU28FKiA@mail.gmail.com"
type="cite">
<pre wrap="">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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</pre>
</blockquote>
<br>
<div class="moz-signature">-- <br>
Sent from my iClayTablet <br>
<br>
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<b style="color:darkred; font-size:larger">Anthony Lomax</b> <br>
<b style="color:dimgray;">161 Allée du Micocoulier, 06370
Mouans-Sartoux, France</b> <br>
<b style="color:dimgray;"> tel: +33 (0)4 93 75 25 02
e-mail: <a href="mailto:anthony@alomax.net">anthony@alomax.net</a>
web: <a href="http://www.alomax.net/">http://www.alomax.net</a>
</b> <br>
<br>
<b style="color:darkgreen;">Science & Special Topics: </b>
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<br>
<b style="color:darkgreen;">ALomax Scientific: </b> <b
style="color:dimgray;"><a href="http://www.alomax.net/alss">http://www.alomax.net/alss</a></b>
<br>
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