Skip to Main content Skip to Navigation
Journal articles

Dynamic response of the Martian ionosphere to an interplanetary shock: Mars Express and MAVEN observations

Abstract : Multipoint observations from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument on board Mars Express and the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission reveal a dynamic response of the Martian ionosphere to abrupt variations in the upstream solar wind plasma. On 2 February 2017, MAVEN, located upstream from the Martian bow shock, encountered a corotating interaction region-related interplanetary shock with a sudden enhancement in the dynamic pressure. MARSIS, operating in the upper ionosphere at ∼478 km altitudes and ∼78° solar zenith angles, observed a sharp increase in the local magnetic field magnitude ∼1 min after the shock passage at MAVEN. The time lag is roughly consistent with the expected propagation time of a pressure pulse from the bow shock to the upper ionosphere at the fast magnetosonic speed. Subsequently, remote soundings recorded disturbed signatures of the topside ionosphere below Mars Express.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03676955
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, May 24, 2022 - 5:15:06 PM
Last modification on : Monday, July 4, 2022 - 9:11:53 AM

File

Geophysical Research Letters -...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

Y. Harada, D. A. Gurnett, A. J. Kopf, J. S. Halekas, S. Ruhunusiri, et al.. Dynamic response of the Martian ionosphere to an interplanetary shock: Mars Express and MAVEN observations. Geophysical Research Letters, 2017, 44, pp.9116-9123. ⟨10.1002/2017GL074897⟩. ⟨insu-03676955⟩

Share

Metrics

Record views

3

Files downloads

5