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Saxonian Seismological Online Network SXNET - overview

Saxonian Seismological Online Network SXNET - overview. S. Funke, S. Wendt*, M. Korn Institute of Geophysics and Geology, University of Leipzig, Germany; *Collm Observatory. Topics. Motivation Cooperation Technical details Part II: SeisComP software in SXNET – experiences and wishes.

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Saxonian Seismological Online Network SXNET - overview

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  1. Saxonian Seismological Online Network SXNET - overview S. Funke, S. Wendt*, M. Korn Institute of Geophysics and Geology, University of Leipzig, Germany; *Collm Observatory

  2. Topics • Motivation • Cooperation • Technical details Part II: • SeisComP software in SXNET – experiences and wishes

  3. Seismicity in Saxony Earthquakes in Germany and vicinity 800 – 2000 (Leydecker, 2002)

  4. B Networks in Saxony SXNET online SXNET offline Neighbours GRSN

  5. Cooperations – networks of the neighbours • TU BA Freiberg – Offline SXNET • Univ. Jena – OTSN • SZGRF Erlangen – GRSN • Univ. München – Bavarian network • GI-ASCR Praha – WEBNET • Univ. Brno – KRASNET

  6. Technical data (SXNET online) • 8 stations • Seismometer: 6 x Le3D-5s, 2 x STS-2; 1 x Geophon 4.5 Hz • Digitizer: 24 Bit, 100 Hz, 1 x 200 Hz (Quanterra, EarthData) • Continuous data acquisition • Data transmission via SeedLink (ISDN) • Calling interval 10 min

  7. Example: station GUNZ

  8. WUET Wüstenhain

  9. WERN Wernitzgrün

  10. Part II: SeisComP software in SXNET – experiences and wishes

  11. Basics: Hardware: standard PC‘s OS: SuSE Linux Data acquisition: SeisComP Data transmission: SeedLink Station site: miniSEED files ring buffer 100 days, mirroring seedlink buffer 7 days one CD per two weeks Data flow (I)

  12. Data center (Leipzig) data calls via ISDN (dial up every 10 min) seedlink buffer 3 days further stations via internet: NKC 20 Hz FBE 100 Hz ROTZ 200 Hz ca. one DVD per week Collm observatory via internet: Data analysis SZGRF Erlangen via internet ... Data flow (II)

  13. SeisComP + SXNET (I) • Continuous data, sampling rate 100 Hz, dial-up network (ISDN) • Mirroring – two versions: • SZGRF „processdayfiles“ • RAID1 • Automatic backup at the station site on CD/DVD („processdayfiles“) • Data delay of the data center max. 10 min

  14. SeisComP + SXNET (II) • „Fifo“ after broken line • Special case WERN: • reverse dial-up, analoguous phone line • 6-channel EarthData, sampling rate 200 Hz • handshaking between digitizer and data aquisition

  15. WERN Wernitzgrün

  16. SeisComP – small wishes (Version 2.5 not yet tested in Leipzig) • „Show active file“ like versions 1.x • Easier configuration: • Private templates or • private defaults • Localization of menues (german)

  17. Thanks ... • ... for the powerful software, • ... for founding: Sächsisches Landesamt für Umwelt und Geologie, • ... to all neighboured networks for exchanging data, • ... to you!

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