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Creating Database

Technical Notes:

1. Seismograms in SEED format can be retrieved from multiple data centers:  http://www.iris.washington.edu/manuals/netdc/netdc_user.htm   , via "view processing queue WILBER II":   http://www.iris.washington.edu/cgi-bin/wilberII_page1.pl or  http://www.iris.edu/data/WebRequest.htm.  then transform them from SEED to DB DATASCOPE format, and store them.

2. Program DbCreator uses rdseed program to create AH bin files from all of seed volumes (directory SeedVols , files  *.seed) and puts these AH bin files into working directory “work”. Program rdseed is placed in /opt/fmt/bin directory. The text file </opt/fmt/bin/fmtRdseed.initial> contains information for DbCreator program. Using this file DbCreator creates temporary file for rdseed program providing AH bin files extraction from rdseed volume.  Such program design allows working with AH bin files directly. Make sure that last extension name of each file is “AH” (for example “1997.288.00.16.45.8310.IU.WVT.01.LHN.AH” or ”WVT.LHZ.AH”, or “1.AH”).  
If you work with the files those not created with the program rdseed, do not use file names containing more than 5 dots. It is recommended to use 'rdseed' standard name format:   yyyy.ddd.hhh.mm.ss.ffff.NNN.SSSSS.LLL.CCC.Q.AH  
(See http://www.iris.edu/manuals/rdseed.htm). Here yyyy is the year, ddd is the Julian day, hh.mm.ss.ffff is the time of day of the start of the first record, SSSSS is the station name, and CCC is the   component name for the particular seismogram being recovered, NNN is Network codes, LLL is Location identifiers, Q is specify data type ( E - Everything, D - Data of undeteminated state, R - Raw waveform data, Q - Quality controlled data, some processes have been aplyed to the data).

3. Program allows decimating of time series to 1 sample per second and to 1 sample per 10 seconds. The decimate rate must be a multiple of the product of 2,4,5.
The program allows to keep the original sampling.

4. Network codes are assigned by the FDSN archive (IRIS DMC) to provide uniqueness to seismological data streams.
Look at    http://www.iris.washington.edu/FDSN/networks.txt (permanent)
and   http://www.iris.washington.edu/FDSN/networks.portable.txt (temporary).

5. In 1998, the DMC started to use location identifiers to identify uniquely a data stream among many data streams for the same channel id and station id.
              EXAMPLES: 1997.288.00.16.45.8310.IU.WVT.00.LHN.AH and 1997.288.00.16.45.8310.IU.WVT.10.LHN.AH means there are two different instruments at the ANMO sight that use the BHZ channel designation.
              (For more information about how location identifiers are applied, please read this DMC Electronic Newsletter article. http://www.iris.washington.edu/newsletter/vol1no1/page1.htm)
              If a station does not use location identifiers, the file name will look something like this: 1997.288.00.16.45.8310.IU.WVT..LHN.AH. For instance if you have an STS-1 and STS-2 BHZ channel the location id could be:
    00 for the STS-1 (primary stream)
    10 for the STS-2 ( the secondary stream)
    20 for other sensors, etc

6. More details concerning IRIS (Data Sources, Request Methods, Manuals, Software, Services etc.) can be found in http://www.iris.edu/hq/.
7. More details concerning DB DATASCOPE can be found in  http://www.passcal.nmt.edu/software/datascope/datascope.html


Creating Database

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