Analysis of Two Selected Solar Events in 2011 and 2015 With Mars Express Radio Occultation Data - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Radio Science Année : 2023

Analysis of Two Selected Solar Events in 2011 and 2015 With Mars Express Radio Occultation Data

Résumé

The temporal behavior of the Martian ionosphere is highly variable due to various dynamic processes including space weather events. Here, we study the effect of solar flares and coronal mass ejections (CMEs) on the Martian ionosphere for two selected solar events in 2011 and 2015, using the publicly available Mars EXpress (MEX) radio occultation (RO) data (MaRS). We developed a data processing software that converts the calibrated Radio Occultation (RO) Doppler data to scientifically valuable atmospheric profiles. Using this software and previously unexplored MaRS observations, the variations in ionospheric parameters (electron density profiles and total electron content (TEC)) are calculated in order to evaluate the ionospheric changes due to solar flares and CMEs. The RO measurements mostly available 1–4 days apart from the peak events, showed no evident change in the TEC nor in the shape of electron density profiles except for a possible gradual decrease in altitude of M2 (main layer) peak density following the arrival of CMEs. To better quantify the effect of solar events on electron density profiles, RO observations near the time of arrival of solar flares and CMEs are crucial. This can be achieved by frequent RO measurements by various Mars orbiters including spacecraft‐to‐spacecraft measurements assisted by multi‐instrument monitoring of the ionosphere.
Fichier principal
Vignette du fichier
Radio Science - 2023 - Krishnan - Analysis of Two Selected Solar Events in 2011 and 2015 With Mars Express Radio.pdf (2.62 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04379497 , version 1 (08-01-2024)

Identifiants

Citer

Ananya Krishnan, Ozgur Karatekin, Sébastien Verkercke, Gregoire Henry, Beatriz Sánchez-Cano, et al.. Analysis of Two Selected Solar Events in 2011 and 2015 With Mars Express Radio Occultation Data. Radio Science, 2023, 58 (12), ⟨10.1029/2023RS007784⟩. ⟨hal-04379497⟩
43 Consultations
11 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More