Preprints
https://doi.org/10.5194/gi-2021-17
https://doi.org/10.5194/gi-2021-17

  22 Jun 2021

22 Jun 2021

Review status: a revised version of this preprint is currently under review for the journal GI.

Swarm Langmuir Probes' data quality and future improvements

Filomena Catapano1, Stephan Buchert2, Enkelejda Qamili1, Thomas Nilsson2, Jerome Bouffard3, Christian Siemes4, Igino Coco5, Raffaella D'Amicis6, Lars Tøffner-Clausen7, Lorenzo Trenchi1, Poul Erik Holmdahl Olsen7, and Anja Stromme3 Filomena Catapano et al.
  • 1Serco c/o ESA, Earth Observation Directorate, Frascati, Italy
  • 2Swedish Institute of Space Physics, Uppsala, Sweden
  • 3European Space Agency (ESA), Earth Observation Directorate, Frascati, Italy
  • 4Delft University of Technology, Delft, The Netherlands
  • 5Istituto Nazionale di Geofisica e Vulcanologia (INGV), Roma, Italy
  • 6National Institute for Astrophysics, Institute for Space Astrophysics and Planetology, Roma, Italy
  • 7DTU Space, Technical University of Denmark, Denmark

Abstract. Swarm is ESA's (European Space Agency) first Earth observation constellation mission, which was launched in 2013 to study the geomagnetic field and its temporal evolution. Two Langmuir Probes (LPs) on board of each of the three Swarm satellites provide very accurate measurements of plasma parameters, which contribute to the the study of the ionospheric plasma dynamics. To maintain a high data quality for scientific and operational applications, the Swarm products are continuously monitored and validated via science-oriented diagnostics. This paper presents an overview of the data quality of the Swarm Langmuir Probes' measurements. The data quality is assessed by analysing short and long data segments, where the latter are selected sufficiently long to consider the impact of the solar activity. Langmuir Probes data have been validated through comparison with numerical models, other satellite missions, and ground observations. Based on the outcomes from quality control and validation activities conduced by ESA, as well as scientific analysis and feedback provided by the user community, the Swarm products are regularly upgraded. In this paper we discuss the data quality improvements introduced with the latest baseline, and how the data quality is influenced by the solar cycle. The main anomaly affecting the LP measurements is described, as well as possible improvements to be implemented in future baselines.

Filomena Catapano et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gi-2021-17', Anonymous Referee #1, 02 Aug 2021
    • AC1: 'Reply on RC1', Filomena Catapano, 01 Nov 2021
  • RC2: 'Comment on gi-2021-17', Anonymous Referee #2, 06 Oct 2021
    • AC2: 'Reply on RC2', Filomena Catapano, 01 Nov 2021

Filomena Catapano et al.

Filomena Catapano et al.

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Short summary
The quality control and validation activities performed by the Swarm Data Quality Team reveal the good quality LP. The analysis demonstrated that the current baseline plasma data products are improved with respect to previous baseline. The LP have captured the ionospheric plasma variability over more than half of a solar cycle, revealing the data quality depenndence on the solar activity. The quality of the LP data will further improve promoting their application to a broad range of studies.