slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
NNSN Real-time data-acquisition Event detection and Monitoring PowerPoint Presentation
Download Presentation
NNSN Real-time data-acquisition Event detection and Monitoring

Loading in 2 Seconds...

play fullscreen
1 / 16

NNSN Real-time data-acquisition Event detection and Monitoring - PowerPoint PPT Presentation


  • 217 Views
  • Uploaded on

NNSN Real-time data-acquisition Event detection and Monitoring. Stations in NNSN. Norwegian National Seismic Network and other seismic stations in Norway. Blue symbols are NNSN stations and red symbols are NORSAR arrays. The station JMIC is operated by NORSAR. SEISLOG configurations.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'NNSN Real-time data-acquisition Event detection and Monitoring' - breindel-dorsey


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
stations in nnsn
Stations in NNSN

Norwegian National Seismic Network and other seismic stations in Norway.

Blue symbols are NNSN stations and red symbols are NORSAR arrays.

The station JMIC is operated by NORSAR.

seislog configurations
SEISLOG configurations

DIGITISER

SEISLOG Windows

LISS-server

GPS

Central LINUX system

DIGITISER

SEISLOG Linux

LISS-server

SeedLink-server

GPS

SeedLink-server

TCP/IP communication over:

ADSL

ISDN

GPRS(mobile phone lines)

SEISLOG Embedded

DIGITISER

LISS-server

GPS

what is liss
What is LISS
  • Made for installations and maintenance of the Global Seismic Network and collection and distribution of data produced by these stations.
  • Sends out live data from the Global Seismic Network
  • Albuquerque Seismological Lab is part of USGS and responsable
  • Protocol: one-way only
  • Data transmitted in standardized MiniSeed format 512 byte blocks.
  • 32 byte integer, Steim1 or Steim2 compression
what is seedlink
What is SEEDLINK
  • Similar to LISS with extra headers added
  • Capable of 2 way communication
  • Retransmission
  • SEEDLINK server made by GFZ-Potsdam and integrated in their SEISCOMP acquisition system
  • Used for GEOFON network and others
  • Data transmitted in standardized MiniSeed format 512 byte blocks.
  • 32 byte integer, Steim1 or Steim2 compression
software
Software
  • All SEISLOG Linux routines are written in C
  • Software identical for desktop PC, laptop and embedded
  • Utilities for monitoring and graphics are written as clients communicating with SEISLOG server over sockets
  • Ringbuffer and event files written in MiniSEED format
  • SEISAN S-files written in SEISAN data base structure
  • Waveform data written in SEISAN data base structure
  • Server function emulates LISS server (transmission of 512 byte MiniSEED blocks over Internet)
communication for nnsn
Communication for NNSN
  • Fixed internet (university network), free
  • Internet with ADSL, cheap
  • Internet with ISDN, expensive
  • Internet with mobile phone (3G, Edge or GPRS), medium price
nnsn real time system
NNSN real time system
  • Data in realtime to data center in Bergen
  • Improved network monitoring
  • Central triggering instead of local at station
  • Should be based on well tested public domain software
  • Develope new software for real time systems and make it public domain
  • Use the protocols LISS and/or SEEDlink
nnsn real time data acquisition
NNSN real-time data acquisition

Linux station

SEISLOG

Seedlink server

LINUX SERVER

Seedlink

continous

SeedLink Server

24-hour Continous

data files

Re-transmission

Communication

with other Seedlink

servers.

EarthWorm

Input data from

SeedLink server

Triggering

Helicorder plots

SEISAN

Windows

station

SEISLOG

Liss

continous

Liss

continous

Embedded

Linux

Station

SEISNET

SEISAN

DATA-BASE

FTP/Telnet

rtnet real time plot
RTNET real time plot

Plot uses SEEDLINK as input

rtnet real time plot filtered
RTNET real time plot filtered

Raw signals

Signals filtered 2-8 Hz

nnsn experience
NNSN experience
  • 20 stations from Norway

3 stations from Finland

3 stations from Denmark

4 stations from UK

  • EARTHWORM has triggered reliably but real time station density is too low to give good coverage in some parts parts of the network
  • SeedLink server has been very stable
  • The graphical monitoring of real-time data has been very useful