Thread: Question re. TA data via TimeSeries URL Builder

Hi John,

Your query includes a specification of location ID "00", it's the loc=00 part. The TA network does not routinely use location 00 IDs for the seismic channels, instead empty location IDs are used. You can either leave this parameter blank (and the Builder will fill it in for you with dashes), or explicitly request the blank location ID by setting the value to two dashes (--).

The query would then look like this:

http://www.iris.edu/ws/timeseries/query?net=TA&sta=Y22C&loc=--&cha=BHZ&start=2007-07-23T22.30.00&end=2007-07-23T23.30.00&output=plot&ref=direct

As a connivence the IRIS web services will generally take two dashes (--) for a location ID and translate that to two space characters which is how "empty" location IDs are stored in the SEED format. Two space characters may also be used but can sometimes be tricky to specify cleanly and obviously in scripts, etc.

Chad


On Aug 1, 2011, at 6:22 PM, John Jasbinsek wrote:

Hello,
I tried to make a query with the TimeSeries URL Builder (http://www.iris.edu/ws/timeseries/builder) for TA data from an even in 2007. I have previously downloaded SEED and SAC files for this event at over 300 stations, but wanted to check out the TimeSeries Builder tool.

the timeseries builder created this query for me:

http://www.iris.edu/ws/timeseries/query?net=TA&sta=Y22C&loc=00&cha=BHZ&start=2007-07-23T22.30.00&end=2007-07-23T23.30.00&output=plot&ref=direct

I was surprised to get a message that no data exists:

HTTP Error 404: Not Found


The Timeseries webservice was unable to find any data for your request: No data found for:TA,Y22C,00,BHZ,2007-07-23T22:30:00.000,2007-07-23T23:30:00.000

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Is there a past time limit on TA data available through the TimeSeries Builder? I could not find any indication of this on the IRIS website.


Thank you,
John

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