Results 91 to 100 of about 58,273 (212)

Effects of Solar Activity, Solar Insolation and the Lower Atmospheric Dust on the Martian Thermosphere [PDF]

arXiv, 2022
A diagnosis of the Ar densities measured by the Neutral Gas and Ion Mass Spectrometer aboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) and the temperatures derived from these densities shows that solar activity, solar insolation, and the lower atmospheric dust are the dominant forcings of the Martian thermosphere.
arxiv  

Formula for the Chandler Period (Free Wobble of Planetary Bodies)

Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract If the rotational equilibrium of a planetary body is disturbed, the rotation pole responds with a cyclical motion. The duration of one cycle is referred to as the Chandler period, and, when viewed from space, the body wobbles. Because planets are not rigid, the wobble period differs from the Euler period by the factor 1−kX/kf $\left(1-{k}_ ...
V. Patočka, M. Walterová
wiley   +1 more source

Passive Observation of Martian Atmosphere Using O₂(a¹Δ_g) Airglow Radiation: Forward Simulation and Wind Retrieval

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The passive monitoring of Martian wind fields is crucial for deciphering the Martian atmosphere. With the 3 strong spectral lines in the 1.27 μm O2(a1Δg) airglow emission band, this article designs the Martian Static Wind Imaging Michelson ...
Zhengyi Chen, Biyun Zhang, Chunmin Zhang
doaj   +1 more source

Dune formation on the present Mars [PDF]

, 2007
We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of sand-moving winds occuring on today's Mars.
arxiv   +1 more source

Mercury's Tidal Love Number h2 ${h}_{2}$ From Co‐Registration of MLA Profiles

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Due to its eccentric orbit, Mercury experiences a varying gravitational pull from the Sun along its orbit, leading to periodic surface tidal deformation. The previous measurement of Mercury's tidal h2 ${h}_{2}$ by Bertone et al. (2021, https://doi.org/10.1029/2020je006683) is based on minimizing height differences at cross‐overs of the Mercury
Haifeng Xiao, Alexander Stark, Gregor Steinbrügge, Arthur Briaud, Luisa M. Lara, Pedro J. Gutiérrez   +5 more
wiley   +1 more source

Martian atmospheric Lee waves [PDF]

Icarus, 1976
Mariner 9 television pictures of Mars extensive mountain lee wave phenomenon in the northern mid-latitudes during winter were evaluated. The characteristic wave length of the lee waves is readily observable, and in a few cases the boundaries of the wave patterns, as well as the wave length, are observed.
openaire   +2 more sources

Observational Characteristics of Electron Distributions in the Martian Induced Magnetotail

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Mars's magnetotail represents a unique case within the solar system, embodying both intrinsic and induced magnetic fields. Yet, the electron dynamics within this region have remained largely unexplored. Utilizing nine years of electron and magnetic field data from the Mars Atmosphere and Volatile EvolutioN mission (MAVEN), we conducted a ...
Chi Zhang, Chuanfei Dong, Hongyang Zhou, Jan Deca, Shaosui Xu, Yuki Harada, Shannon M. Curry, David L. Mitchell, Zhi‐Yang Liu, Junfeng Qin, Christian Mazelle   +10 more
wiley   +1 more source

Evolution of Force‐Free Magnetic Structure in the Dayside Ionosphere of Mars

Journal of Geophysical Research: Space Physics, Volume 130, Issue 4, April 2025.
Abstract Magnetic fields measured in the ionosphere of Mars by the magnetometers onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) and the Mars Global Surveyor (MGS) spacecraft display a wide range of spatial scales, ranging from global to small‐scale.
T. E. Cravens, O. Hamil, A. R. Renzaglia, S. R. Shaver, S. A. Ledvina, C. S. Kennedy   +5 more
wiley   +1 more source

Morphology of the Excited Hydroxyl in the Martian Atmosphere: A Model Study—Where to Search for Airglow on Mars?

Remote Sensing
Monitoring excited hydroxyl (OH*) airglow is broadly used for characterizing the state and dynamics of the terrestrial atmosphere. Recently, the existence of excited hydroxyl was confirmed using satellite observations in the Martian atmosphere.
Dmitry S. Shaposhnikov, Mykhaylo Grygalashvyly, Alexander S. Medvedev, Gerd Reinhold Sonnemann, Paul Hartogh   +4 more
doaj   +1 more source

Ares: A Mars model retrieval framework for ExoMars Trace Gas Orbiter NOMAD solar occultation measurements [PDF]

arXiv, 2020
Ares is an extension of the TauREx 3 retrieval framework for the Martian atmosphere. Ares is a collection of new atmospheric parameters and forward models, designed for the European Space Agency's (ESA) Trace Gas Orbiter (TGO) Nadir and Occultation for MArs Discovery (NOMAD) instrument, Solar Occultation (SO) channel. Ares provides unique insights into
arxiv