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Discussion papers
https://doi.org/10.5194/gi-2019-35
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2019-35
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 04 Dec 2019

Submitted as: research article | 04 Dec 2019

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This preprint is currently under review for the journal GI.

In-orbit results of the Coupled Dark State Magnetometer aboard the China Seismo-Electromagnetic Satellite

Andreas Pollinger1,2, Christoph Amtmann2, Alexander Betzler2,1, Bingjun Cheng3, Michaela Ellmeier1,2, Christian Hagen2,1, Irmgard Jernej1, Roland Lammegger2, Bin Zhou3, and Werner Magnes1 Andreas Pollinger et al.
  • 1Space Research Institute, Austrian Academy of Sciences, Graz, 8042, Austria
  • 2Institute of Experimental Physics, Graz University of Technology, Graz, 8010, Austria
  • 3National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China

Abstract. The China Seismo-Electromagnetic Satellite (CSES) was launched in February 2018 into a polar, sun-synchronous, low Earth orbit. It provides the first demonstration of the Coupled Dark State Magnetometer (CDSM) measurement principle in space. The CDSM is an optical scalar magnetometer based on the Coherent Population Trapping (CPT) effect and measures the scalar field with the lowest absolute error aboard CSES. Therefore, it serves as the reference instrument for the measurements done by the fluxgate sensors within the High Precision Magnetometer instrument package.

In this paper several correction steps are discussed in order to improve the accuracy of the CDSM data. This includes the extraction of valid 1 Hz data, the application of the sensor heading characteristic, the handling of discontinuities at CPT resonance transitions as well as the removal of fluxgate and satellite interferences.

The in-orbit performance is compared to the Absolute Scalar Magnetometer aboard the SWARM satellite Bravo via the CHAOS-6 magnetic field model. Additionally, an uncertainty of the magnetic field measurement is derived from unexpected parametric changes of the CDSM in orbit in combination with performance measurements on ground.

Andreas Pollinger et al.

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Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

Andreas Pollinger et al.

Andreas Pollinger et al.

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