the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Ionospheric Plasma Density Measurements by Swarm Langmuir Probes: Limitations and possible Corrections
Piero Diego
Igino Coco
Igor Bertello
Maurizio Candidi
Pietro Ubertini
Abstract. The ESA Swarm constellation includes three satellites, which have been observing the Earth's ionosphere since November 2013, following polar orbits. The main ionospheric plasma parameters, such as electron density and temperature, are measured by means of Langmuir probes (Lps); electron density measurements, in particular, are nowadays largely considered as qualitatively reliable, and have been used in several published papers to date. In this work, we aim to discuss how some technical characteristics of Swarm Lps, such as their size and location on board the satellites, as well as the operational setup of the instruments, could lead to limitations in their accuracy if one underestimates the influence of satellite proximity, and the larger extension of the plasma sheath surrounding the probes due to the operational point of the voltage ripple. Two specific corrections are proposed for the assessment and possible mitigation of such effects. Finally, a comparison is made with electron density measurements from CSES-01 mission, which relies on Langmuir probes as well, whose geometry and operating mode are standard.
Piero Diego et al.


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RC1: 'Referee report – angeo-2019-136 - Ionospheric Plasma Density Measurements by Swarm Langmuir Probes: Limitations and possible Corrections - Piero Diego, Igino Coco, Igor Bertello, Maurizio Candidi, Pietro Ubertini', Anonymous Referee #1, 19 Sep 2019
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AC3: 'Answer to Referee 1', Piero Diego, 10 Oct 2019
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AC3: 'Answer to Referee 1', Piero Diego, 10 Oct 2019
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SC1: 'Report about the CSES LAP data', Xiuying Wang, 30 Sep 2019
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AC1: 'Answer to SC1', Piero Diego, 10 Oct 2019
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SC3: 'Reply to the answer', Xiuying Wang, 11 Oct 2019
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SC3: 'Reply to the answer', Xiuying Wang, 11 Oct 2019
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AC1: 'Answer to SC1', Piero Diego, 10 Oct 2019
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SC2: 'Comment to the paper angeo-2019-136', Matthias Förster, 02 Oct 2019
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AC2: 'Answer to SC2', Piero Diego, 10 Oct 2019
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AC2: 'Answer to SC2', Piero Diego, 10 Oct 2019
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RC2: 'Referee#2 comments', Anonymous Referee #2, 03 Oct 2019
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AC4: 'Answer to Referee 2', Piero Diego, 10 Oct 2019
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AC4: 'Answer to Referee 2', Piero Diego, 10 Oct 2019
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AC5: 'Final Comment', Piero Diego, 05 Nov 2019


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RC1: 'Referee report – angeo-2019-136 - Ionospheric Plasma Density Measurements by Swarm Langmuir Probes: Limitations and possible Corrections - Piero Diego, Igino Coco, Igor Bertello, Maurizio Candidi, Pietro Ubertini', Anonymous Referee #1, 19 Sep 2019
-
AC3: 'Answer to Referee 1', Piero Diego, 10 Oct 2019
-
AC3: 'Answer to Referee 1', Piero Diego, 10 Oct 2019
-
SC1: 'Report about the CSES LAP data', Xiuying Wang, 30 Sep 2019
-
AC1: 'Answer to SC1', Piero Diego, 10 Oct 2019
-
SC3: 'Reply to the answer', Xiuying Wang, 11 Oct 2019
-
SC3: 'Reply to the answer', Xiuying Wang, 11 Oct 2019
-
AC1: 'Answer to SC1', Piero Diego, 10 Oct 2019
-
SC2: 'Comment to the paper angeo-2019-136', Matthias Förster, 02 Oct 2019
-
AC2: 'Answer to SC2', Piero Diego, 10 Oct 2019
-
AC2: 'Answer to SC2', Piero Diego, 10 Oct 2019
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RC2: 'Referee#2 comments', Anonymous Referee #2, 03 Oct 2019
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AC4: 'Answer to Referee 2', Piero Diego, 10 Oct 2019
-
AC4: 'Answer to Referee 2', Piero Diego, 10 Oct 2019
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AC5: 'Final Comment', Piero Diego, 05 Nov 2019
Piero Diego et al.
Piero Diego et al.
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