Journal cover Journal topic
Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
doi:10.5194/gi-2017-23
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
30 Mar 2017
Review status
This discussion paper is under review for the journal Geoscientific Instrumentation, Methods and Data Systems (GI).
A low-power data acquisition system for geomagnetic observatories and variometer stations
Achim Morschhauser, Jürgen Haseloff, Oliver Bronkalla, Carsten Müller-Brettschneider, and Jürgen Matzka GFZ German Research Centre for Geosciences
Abstract. A modern geomagnetic observatory must provide data of high stability, continuity, and resolution. The INTERMAGNET network has therefore specified quantitative criteria to ensure a high quality standard of geomagnetic observatories. Here, we present a new data acquisition system which was designed to meet these criteria, in particular with respect to 1 Hz data. This system is based on a Raspberry Pi embedded PC and a modern 24 bit analog-to-digital converter and runs a C++ data acquisition software which is compatible with the POSIX standard. As a result, the data acquisition system is modular, cheap, flexible, and can be operated in remote areas with limited power supply. In addition, the system is capable of real-time data transmission, using a reverse SSH tunnel to work with any network available. We have successfully tested the system hardware at the Niemegk observatory for a period of one year and subsequently installed at the Tatuoca observatory in Brazil.

Citation: Morschhauser, A., Haseloff, J., Bronkalla, O., Müller-Brettschneider, C., and Matzka, J.: A low-power data acquisition system for geomagnetic observatories and variometer stations, Geosci. Instrum. Method. Data Syst. Discuss., doi:10.5194/gi-2017-23, in review, 2017.
Achim Morschhauser et al.
Achim Morschhauser et al.
Achim Morschhauser et al.

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Short summary
A modern geomagnetic observatory is expected to record geomagnetic data with high stability, high resolution, and high reliability. Also, such observatories may be located in remote areas, requiring low power consumption and simple maintenance. Here, we present a new datalogger system that was designed to meet these criteria. This system is based on a Raspberry Pi embedded PC and includes a modular C++ software package which can be adapted to specific observatory setups.
A modern geomagnetic observatory is expected to record geomagnetic data with high stability,...
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