The images and pdf files available from this post are updated regularly.
We are very fortunate in being able to receive daily data updates from our prototype CASE-IPY stations. The following pdf files contain daily snapshots of the 1sps data (Z=vertical component, N=North-South component, E=East-West component):
CAS01.Z , CAS01.N , CAS01.E
CAS02.Z , CAS02.N , CAS02.E
CAS03.Z , CAS03.N , CAS03.E
The following image shows the vertical component seismograms of the latest available data for the three stations. Click on the image for a larger version.
Here is a quick description of the steps taken to process the data into these snapshots:
- three component analogue data is produced by a seismometer;
- the data is digitized by a Reftek-130 acquisition system and stored locally on flash cards;
- the Reftek turns on a radio modem once a day for 10 minutes;
- a PC at Concordia monitors the radio link to each station continuously, and launches the retrieval process for the previous day's data when the link is active;
- Jean-François Vanacker, who is wintering over at Concordia, checks the data have arrived correctly, compresses them and sends them to us via email once a day;
- my colleague JJL unpacks the data, views them, processes them into a more usable format (miniseed), places the raw and processed data in a central archive and updates the SOH (state-of-health) plot available from this post;
- I process the miniseed data to generate the daily snapshots, and update the pdf files available above.
Keep up to date with the latest developments at http://sismordia.blogspot.com