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Previous observations have shown that, during Martian dust storms, the peak of the ionosphere rises in altitude. Observational studies of this type, however, have been extremely limited. Using 13 years of ionospheric peak altitude data from…

地球与行星天体物理 · 物理学 2020-02-05 Z. Girazian , Z. Luppen , D. D. Morgan , F. Chu , L. Montabone , E. M. B. Thiemann , D. A. Gurnett , J. Halekas , A. J. Kopf , F. Nemec

The Mars Science Laboratory (MSL) Rover Environmental Monitoring Station (REMS) has now made continuous in-situ meteorological measurements for several martian years at Gale crater, Mars. Of importance in the search for liquid formation are…

Analysis of Lunar Laser Ranging (LLR) data provides science results: gravitational physics and ephemeris information from the orbit, lunar science from rotation and solid-body tides, and Earth science. Sensitive tests of gravitational…

广义相对论与量子宇宙学 · 物理学 2007-05-23 James G. Williams , Dale H. Boggs , Slava G. Turyshev , J. Todd Ratcliff

The scattering rate at dark-matter direct-detection experiments should modulate annually due to the Earth's orbit around the Sun. The rate is typically thought to be extremized around June 1, when the relative velocity of the Earth with…

宇宙学与河外天体物理 · 物理学 2014-02-03 Samuel K. Lee , Mariangela Lisanti , Annika H. G. Peter , Benjamin R. Safdi

In this paper, we analyze water ice occurrences at the surface of Mars using near-infrared observations, and we study their distribution with a climate model. Latitudes between 45{\deg}S and 50{\deg}N are considered. Data from the…

地球与行星天体物理 · 物理学 2015-05-27 Mathieu Vincendon , François Forget , John Mustard

Atmospheric gravity (buoyancy) waves (GWs) are of great importance for the energy and momentum budget of all planetary atmospheres. Propagating upward waves carry energy and momentum from the lower atmosphere to thermospheric altitudes and…

地球与行星天体物理 · 物理学 2021-10-27 Erdal Yiğit , Alexander S. Medvedev , Paul Hartogh

The impact of a rarest solar wind phenomenon [disappearing solar wind (DSW) event during 26-28 December 2022] on the Martian nightside ionosphere is investigated, for the first time, using MAVEN datasets. During an extremely low solar wind…

空间物理 · 物理学 2024-04-12 L. Ram , D. Rout , S. Sarkhel

The reflectance of water ice and dust mixtures depends, amongst other parameters, on how the components are mixed (e.g. intimate mixture, areal mixture or coating) (Clark et al. 1999). Therefore, when inverting the reflectance spectra…

地球与行星天体物理 · 物理学 2022-07-29 Zuriñe Yoldi , Antoine Pommerol , Olivier Poch , Nicolas Thomas

We present initial analysis and conclusions from plasma observations made during the reported "Mars plume event" of March - April 2012. During this period, multiple independent amateur observers detected a localized, high-altitude "plume"…

Galactic cosmic-ray (GCR) flux short-term variations ($<$1 month) in the inner heliosphere are mainly associated with the passage of high-speed solar wind streams (HSS) and interplanetary (IP) counterparts of coronal mass ejections (ICMEs).…

地球与行星天体物理 · 物理学 2020-12-07 Catia Grimani , Andrea Cesarini , Michele Fabi , Federico Sabbatini , Daniele Telloni , Mattia Villani

Soil assessment is important for mobile robot planning and navigation on natural and planetary environments. Terramechanic characteristics can be inferred from the thermal behaviour of soils under the influence of sunlight using remote…

Proton auroras are widely observed on the dayside of Mars, identified as a significant intensity enhancement in the hydrogen Lyman alpha (121.6 nm) emission between 110 - 150 km altitudes. Solar wind protons penetrating as energetic neutral…

地球与行星天体物理 · 物理学 2024-06-25 Dattaraj B. Dhuri , Dimitra Atri , Ahmed AlHantoobi

We present results from the Met Office Unified Model (UM), a world-leading climate and weather model, adapted to simulate a dry Martian climate. We detail the adaptation of the basic parameterisations and analyse results from two…

地球与行星天体物理 · 物理学 2023-02-02 Danny McCulloch , Denis E. Sergeev , Nathan Mayne , Matthew Bate , James Manners , Ian Boutle , Benjamin Drummond , Kristzian Kohary

Planet Mars past environmental conditions were similar to the early Earth, but nowadays they are similar to those of a very cold desert, irradiated by intense solar UV light. However, some terrestrial lifeform showed the capability to adapt…

地球与行星天体物理 · 物理学 2011-02-23 Giuseppe Galletta , Giulio Bertoloni , Maurizio D'Alessandro

Observations show that the lower thermosphere of Mars ($\sim$100--140 km) is up to 40 K colder than the current general circulation models (GCMs) can reproduce. Possible candidates for physical processes missing in the models are larger…

Radial gradients of cosmic rays are key parameters for understanding the transport of particles in space. Solar Orbiter, launched on 2020 February 10, approaches the Sun approximately every half year, with a closest perihelion distance of…

This article is devoted to research the application of the spacecraft with a solar sail to support the certain climatic conditions in an area of the Mars surface. Authors propose principles of functioning of the spacecraft, intended to…

空间物理 · 物理学 2017-09-19 Miroslav A. Rozhkov , Irina V. Gorbunova , Olga L. Starinova

We study the 2018 Martian Global DustStorm (GDS 2018) over the Southern Polar Region using images obtained by the Visual Monitoring Camera (VMC) on board Mars Express during June and July 2018. Dust penetrated into the polar cap region but…

We have developed a method to compute the possible distribution of radio emission regions in a typical pulsar magnetosphere, taking into account the viewing geometry and rotational effects of the neutron star. Our method can estimate the…

星系天体物理 · 物理学 2015-05-18 R. M. C. Thomas , Y. Gupta , R. T. Gangadhara

We present for the first time hourly variations of the spatial density gradient of 50 GeV cosmic rays within a sample solar rotation period in 2006. By inversely solving the transport equation, including diffusion, we deduce the gradient…