Get real-time data from a remote Seedlink server (single station)
You will use scconfig to add waveforms for a single station
which is already in inventory.
Pre-requisites for this tutorial:
Time range estimate:
We suppose there is an upstream Seedlink server, such as that
from GEOFON, IRIS, or some other public source.
Check data are available
First, we’ll query the upstream Seedlink server,
to confirm that it has current data.
We do this with SeisComP’s slinktool command,
giving it the ‘-L’ option to list the available stations.
For this example, we’ll use the server at host geofon.gfz-potsdam.de
on port 18000 (the default)
$ slinktool -L geofon.gfz-potsdam.de
AW VNA1 VNA1
AW VNA2 VNA2
GR BSEG BSEG
GR BUG BUG
GR CLL CLL
GR CLZ CLZ
This can be a long list. It shows the network code and station code of each
of the stations for which data is available from this Seedlink server.
We can restrict the output to our station of interest using grep.
$ slinktool -Q geofon.gfz-potsdam.de | grep GR.CLL
GR CLL LHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:15:28.0299
GR CLL BHZ D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:13.1300
GR CLL BHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:15.4300
GR CLL HHE D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:50.3450
GR CLL HHN D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:52.4650
GR CLL HHZ D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:53.6850
GR CLL LOG L 2020/05/06 15:13:41.2249 - 2020/05/06 19:59:53.3850
GR CLL BHE D 2020/05/06 15:13:41.2249 - 2020/05/06 21:22:08.9300
The ‘-Q’ option provides a formatted stream list,
with one line for each stream available from the server.
The columns are: network code, station code, location code (which may
be empty) and channel code, a flag, and then the (UTC) time of the
first and last data available at the server.
(The grep command here is used to limit output to just those CLL streams;
without it, this server provides thousands of lines of output.)
For an active station the last data time (shown on the
right) will be very recent.
You can restrict who has access to a station’s data (from your server)
in your Seedlink bindings.
This sets the
access variable in your
This can be done for all stations, or per station.
The documentation for seedlink gives details.
In scconfig, under the Bindings tab:
Create a seedlink profile named “geofon”, named after the upstream server.
Double click on the profile.
Select the ‘chain’ plugin for the souce from the drop-down menu
To add the plugin click on the green “plus” button on the left. Name it anything or even leave the name blank.
Open this and set the name of the server (
and its TCP port,
port. Normally you leave the port at 18000 which is the default.
If you wish to limit the data requested to particular channels,
based on channel or location code,
selectors to “BH?.D” say
for fetch all BH stream and no auxiliary streams. Add the location code without
a space to limit by location as well, e.g. 00BH?.D. You may add a comma-separated
list of streams, e.g. “00BH?.D, 10BH?.D”.
Otherwise you will be requesting all streams available for this
station, potentially wasting bandwidth and slowing your system.
No other changes are normally necessary.
Drag and drop this profile from the right side to the network icon on the
left side (you may do that also at the station level)
to apply it to your station.
Press Ctrl+S to save the configuration.
This writes configuration files in
Update the configuration
The SeisComP database must already be updated with the inventory
(see Tutorial Add a new station).
SeisComP’s modules then require restarting to load the updated information.
Go to the System tab and press ESC (the Escape key, to de-select all modules).
Click on “Update configuration”, at the right of the window.
(Not “Refresh”, - that just refreshes scconfig’s
display of what is running!)
Press Start to start acquiring data from the already configured stations.
Alternatively, at the command line:
$ seiscomp update-config seedlink
$ seiscomp restart seedlink
At this point,
you can follow the same procedure for other networks/stations, provided you
Have metadata available. You may follow the tutorial Add a new station.
Know the location of a Seedlink server for, and have access to, the waveforms.