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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/gi-2017-19
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
09 Mar 2017
Review status
A revision of this discussion paper was accepted for the journal Geoscientific Instrumentation, Methods and Data Systems (GI) and is expected to appear here in due course.
The Magnetic Observatory on Tatuoca, Belém, Brazil: History and Recent Developments
Achim Morschhauser1, Gabriel Brando Soares2, Jürgen Haseloff1, Oliver Bronkalla1, José Protasio2, Katia Pinheiro2, and Jürgen Matzka1 1GFZ German Research Centre for Geosciences
2Observatorio Nacional
Abstract. The Tatuoca magnetic observatory (IAGA code: TTB) is located on a small island in the Amazonian delta in the state Pará of Brazil. Its location close to the geomagnetic equator and within the South Atlantic Magnetic Anomaly offers a high scientific return of the observatory's data. A joint effort by Observatorio Nacional, Brazil (ON) and the GFZ German Research Centre for Geosciences (GFZ) was undertaken starting from 2015 in order to modernize the observatory with the goal to join the INTERMAGNET network and to provide real-time data access. In this paper, we will describe the history of the observatory, recent improvements, and plans for the near future. In addition, we will give some comments on absolute observations of the geomagnetic field near the geomagnetic equator.

Citation: Morschhauser, A., Soares, G. B., Haseloff, J., Bronkalla, O., Protasio, J., Pinheiro, K., and Matzka, J.: The Magnetic Observatory on Tatuoca, Belém, Brazil: History and Recent Developments, Geosci. Instrum. Method. Data Syst. Discuss., https://doi.org/10.5194/gi-2017-19, in review, 2017.
Achim Morschhauser et al.
Achim Morschhauser et al.
Achim Morschhauser et al.

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Short summary
We report on the history and recent developments of the Tatuoca magnetic observatory in Brazil. This observatory is located very close to the geomagentic equator and within a region of strong main field dynamics. During 2015 to 2017, we have installed new instrumentation, a new datalogger system, and improved the absolute measurements. In the paper, we also comment on the challenges of doing absolute measurements at the geomagnetic equator.
We report on the history and recent developments of the Tatuoca magnetic observatory in Brazil....
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