Results 41 to 50 of about 1,043 (204)

QEUV vs. Other EUV Proxies: A Re‐Evaluation of Solar EUV Proxies for Thermospheric and Space Weather Investigations

open access: yesSpace Weather, Volume 24, Issue 7, July 2026.
Abstract F10.7, Mg II, and F30 are widely used proxies for variability in solar Extreme UltraViolet (EUV, 5–120 nm) irradiance. An alternative proxy for solar EUV variability is QEUV, an indirect measure of total solar EUV irradiance, retrieved from observations of Earth's Far UltraViolet (FUV, 120–300 nm) airglow and from empirically modeled solar EUV
F. I. Laskar   +7 more
wiley   +1 more source

Stationary flux ropes at the southern terminator of Mars [PDF]

open access: yes, 2012
Flux ropes have long been observed in the upper atmosphere of Venus, and more recently at Mars. Here we present magnetic field measurements of flux ropes encountered at the southern terminator of Mars by Mars Global Surveyor, and compare them to a flux ...
Beharrell, Mat, Wild, James
core  

Revealing the CME Impact on the Martian Nightside Ionosphere Based on MAVEN and Tianwen-1 Observations

open access: yesThe Astrophysical Journal
Due to the absence of an Earth-like dipole magnetic field, the impact of coronal mass ejections (CMEs) on the Martian nightside ionosphere differs from that on Earth and is still not well understood.
Longhui Liu   +8 more
doaj   +1 more source

Retrieval of ionospheric profiles from the Mars Express MARSIS experiment data and comparison with radio occultation data [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2012
Since 2005 the Mars Advanced Radar and Ionospheric Sounding experiment (MARSIS) aboard Mars Express has acquired a unique dataset on the ionosphere of Mars made up of ionospheric soundings taken by the instrument working in its active ionospheric ...
B. Sánchez-Cano   +6 more
doaj   +1 more source

New MAVEN NGIMS Mars Thermosphere Temperature Database for Short Term Variability and Long Term Trends

open access: yesEarth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Current Mars thermospheric temperatures databases have course temporal resolution due to either a lack of data or a need to average over several orbits of data, preventing the study of short‐term, rapid changes to the Mars thermosphere. In this study, we present a new Mars thermosphere temperature database derived from individual orbits of ...
N. B. Pickett   +6 more
wiley   +1 more source

Sub-solar electron temperatures in the lower Martian ionosphere

open access: yesJournal of Geophysical Research: Space Physics, 2019
Abstract Martian subsolar electron temperatures obtained below 250 km are examined using data obtained by instruments on the Mars Atmosphere Evolution Mission (MAVEN) during the three subsolar deep dip campaigns and a one‐dimensional fluid model.
William K. Peterson   +10 more
openaire   +1 more source

Optimization of the Mars ionospheric radio occultation retrieval

open access: yesEarth and Planetary Physics, 2018
Electron density is a key parameter to characterize Martian ionospheric structure and dynamics. Based on the ephemeris and auxiliary information derived from the Spacecraft, Planet, Instruments, C-matrix, and Events (SPICE) toolkit, we calculated the ...
JunYi Wang   +3 more
doaj   +1 more source

Global Occurrence of Solitary Waves in the Martian Magnetosphere

open access: yesGeophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract This letter presents a global occurrence of bipolar solitary waves (SWs) in the Martian magnetosphere. We utilized medium‐frequency electric field measurements from October 2014 to December 2023 from the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.
Sahil Pandey, Amar Kakad, Bharati Kakad
wiley   +1 more source

Modeling the Martian ionosphere [PDF]

open access: yes, 2016
The accessibility of the Martian atmosphere to spacecraft provides an opportunity to study an ionosphere that differs from our own. Yet, despite the half century of measurements made at Mars, the current state of the neutral atmosphere and its embedded ...
Matta, Majd Mayyasi
core  

Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2011
Bow shock, formed by the interaction between the solar wind and a planet, is generated in different patterns depending on the conditions of the planet.
Eojin Kim   +6 more
doaj   +1 more source

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