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Evaluation of electron density measurements of Swarm and CSES satellites for using in ionospheric studies
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Hanieh Tabatabaei *   , Masoud Mashhadi-Hossainali |
| K. N. Toosi University of Technology |
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Abstract: (924 Views) |
| Direct measurements of ionospheric parameters provide accurate information about ionosphere, the most important of which are ionosonde measurements and the Langmuir Probes (LP) observations mounted on satellites. There is currently no active ionosonde station in Iran, so the observations of the Langmuir probes can greatly be helpful for ionospheric studies. This study compares and evaluates the electron density measured by Langmuir Probes on board three Swarm satellites owned by the European Space Agency and measurements of the China Seismic Electromagnetic Satellite (CSES). The global distribution of electron density derived from Swarm A and CSES satellites show good consistency for both ascending (nighttime) and descending (daytime) orbits. Correlation coefficients of electron density between these two satellites at descending and ascending orbits were calculated 0.9268 and 0.8171, respectively, indicating their high consistency. Evaluating of electron density behavior at the intersecting of simultaneous orbits confirmed these results. Correlation coefficients between electronic density derived from Swarm A, B and C with CSES are calculated 0.9199, 0.9138 and 0.9099 for daytime and 0.8990, 9494 and 0.8181 for nighttime, respectively. These results reveal that the electron density observations from these satellites, especially the Swarm B with CSES, are quite correlated which could be due to the close altitudes of these two satellites. The ratio of electron density values of Swarm A to CSES show that the electron density value of Swarm A satellite is often about 4 to 7 times the values of CSES. Also, the comparison of electron density values obtained from the International Reference Ionosphere model (IRI2016) with Swarm and CSES satellites show that there is no systematic and regular relationship between the, especially in nighttime but the electron density values of IRI2016 model are between the values of two other satellites and its values are often about 1 to 3 times the values of CSES. |
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| Keywords: Direct measurements of ionospheric parameters, Langmuir Probe, electron density. |
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Full-Text [PDF 1853 kb]
(261 Downloads)
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Type of Study: Research |
Subject:
Geodesy
Received: 2021/09/1 | Accepted: 2022/12/13 | Published: 2023/12/21
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