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View article: Radio Scintillation and Gravity Wave Characteristics in the Venusian Atmosphere: Insights From Akatsuki Radio Occultation
Radio Scintillation and Gravity Wave Characteristics in the Venusian Atmosphere: Insights From Akatsuki Radio Occultation Open
We investigated the relationship between radio scintillations—short‐term fluctuations in radio signal intensity—and temperature fluctuations, both observed in vertical profiles from JAXA's Akatsuki radio occultation. Our results indicate t…
View article: The MaCro Instrument Aboard M-MATISSE: Scientific Objectives and Operational Concepts
The MaCro Instrument Aboard M-MATISSE: Scientific Objectives and Operational Concepts Open
The M-MATISSE mission, currently undergoing its Phase A study with the European Space Agency (ESA), is a candidate for the Medium-class (M7) program. Its primary objective is to study the complex interactions between Mars' magnetosphere, i…
View article: Correlation between temperature structure and UV contrasts in the clouds of Venus from Venus Express VMC and VeRa data.
Correlation between temperature structure and UV contrasts in the clouds of Venus from Venus Express VMC and VeRa data. Open
Venus exhibits strong and changing contrasts at ultraviolet wavelengths apparently related to the clouds and the dynamics in the cloud layer, but to date their origin continues to be unknown. In this work we analyse the possibility of corr…
View article: Multi-spacecraft observations of the Mars dayside ionosphere: a case study with MEX and MAVEN
Multi-spacecraft observations of the Mars dayside ionosphere: a case study with MEX and MAVEN Open
Fig. 1: MEX MaRS observation of (a) the extended Mars dayside ionosphere on Day of Year (DoY) 102 (2019) and (b) the compressed dayside ionosphere on DoY 100 (2021). Grey crosses are the original data points, while the blue line indicates …
View article: The MaCro Instrument Concept for Dual-Frequency Crosslink Occultations at Mars
The MaCro Instrument Concept for Dual-Frequency Crosslink Occultations at Mars Open
The M-MATISSE mission, currently in its Phase A study by the European Space Agency (ESA), is a Medium-class (M7) candidate that aims to explore the complex interactions between Mars' magnetosphere, ionosphere, and thermosphere (MIT couplin…
View article: Scintillations observed in radio occultation measurements at Venus
Scintillations observed in radio occultation measurements at Venus Open
Radio occultation measurements at Venus have provided invaluable insights into the planet's atmospheric properties. One particularly intriguing phenomenon observed during these measurements is radio scintillations, characterized by rapid f…
View article: Vertical propagation of Venusian thermal tides above and below clouds investigated by Akatsuki radio occultation
Vertical propagation of Venusian thermal tides above and below clouds investigated by Akatsuki radio occultation Open
The vertical structure of the thermal tide in the Venusian low-latitude region (0˚-30˚ latitudes) was investigated by the Akatsuki radio occultation measurements. The result shows that the phase of the diurnal tide little varies in the ver…
View article: Exploring the variability of the Venus ionosphere with the Venus Express VeRa radio science experiment
Exploring the variability of the Venus ionosphere with the Venus Express VeRa radio science experiment Open
Fig. 1: Venus ionosphere observed by VEX VeRa for solar zenith angles (SZAs) on the (a) dayside, (b) terminator, and (c) nightside.The horizontal dashed line indicates the lowest valid altitude of the ionospheric observation.The Venus Expr…
View article: Small-Scale Gravity Waves in the Venus Atmosphere as seen by the VeRa Experiment on Venus Express
Small-Scale Gravity Waves in the Venus Atmosphere as seen by the VeRa Experiment on Venus Express Open
Atmospheric waves are present in the Venus atmosphere across a wide range of spatial scales and may play a significant role in the planet's energy and momentum budget. Small-scale temperature fluctuations, likely caused by gravity waves, a…
View article: Context images for Venus Express radio occultation measurements: A search for a correlation between temperature structure and UV contrasts in the clouds of Venus
Context images for Venus Express radio occultation measurements: A search for a correlation between temperature structure and UV contrasts in the clouds of Venus Open
Context . Venus exhibits strong and changing contrasts at ultraviolet wavelengths. They appear to be related to the clouds and the dynamics in the cloud layer, but to date their origin continues to be unknown. Aims . We investigate the nat…
View article: Different Faces of the Martian Magnetosphere
Different Faces of the Martian Magnetosphere Open
The Martian magnetosphere contains components of the induced and intrinsic magnetospheres. Since we can not get a global snapshot of the magnetosphere we use a statistical picture based on a large number of measurements. Depending on the c…
View article: Vertical Structure of the Martian Atmosphere: The View from Mars Express
Vertical Structure of the Martian Atmosphere: The View from Mars Express Open
Launched in 2003, the European Space Agency’s Mars Express (MEX) has been orbiting Mars for 20 years and its instruments have performed continuous monitoring of the conditions in the Martian atmosphere, providing one of the most complete d…
View article: Scintillations Observed in Radio Occultation Measurements at Venus
Scintillations Observed in Radio Occultation Measurements at Venus Open
Radio occultation measurements at Venus have provided invaluable insights into the planet's atmospheric properties. One particularly intriguing phenomenon observed during these measurements is radio scintillations, characterized by rapid f…
View article: A dipole-like magnetosphere of Mars
A dipole-like magnetosphere of Mars Open
The Martian magnetosphere is unique in our Solar system because it contains components of an induced and an intrinsic magnetosphere. Since we can not get a global snapshot of the magnetosphere at a given time we use a statistical picture b…
View article: Context images for Venus Express radio occultation measurements: A search for a correlation between temperature structure and UV contrasts in the clouds of Venus
Context images for Venus Express radio occultation measurements: A search for a correlation between temperature structure and UV contrasts in the clouds of Venus Open
Venus exhibits strong and changing contrasts at ultraviolet wavelengths apparently related to the clouds and the dynamics in the cloud layer, but to date their origin continues to be unknown. We investigate the nature of the UV contrasts e…
View article: Venus' O 5577 Å Oxygen Green Line: A Global Diffuse Proton‐Induced Aurora
Venus' O 5577 Å Oxygen Green Line: A Global Diffuse Proton‐Induced Aurora Open
The Venusian O( 1 S– 1 D) 5577 Å “oxygen green line” has been an enigmatic feature of the Venusian atmosphere since its first attempted observation by the Venera spacecraft. Its first detection in 1999 and subsequent detections point to a …
View article: Long-term variations of temperature and H2SO4 gas mixing ratio in the Venusian atmosphere studied with Venus Express and Akatsuki radio occultation measurements
Long-term variations of temperature and H2SO4 gas mixing ratio in the Venusian atmosphere studied with Venus Express and Akatsuki radio occultation measurements Open
It is well known that planetary atmospheres have a wide range of time-scale variations that have a significant impact on the surface environment of the planet. Taking the Earth as an example, long-term scale atmospheric variations such as …
View article: Radio Sounding of the Venusian Atmosphere with the RSE Experiment on EnVision
Radio Sounding of the Venusian Atmosphere with the RSE Experiment on EnVision Open
EnVision has been selected in the M5 call of ESA’s Cosmic Vision program as the next European led mission to Venus. It is dedicated to unravel some of the numerous open questions about Venus' past, current state and future and will h…
View article: Radio Scintillations observed during Venus Express radio occultation measurements
Radio Scintillations observed during Venus Express radio occultation measurements Open
Radio occultation measurements conducted at Venus have yielded invaluable insights into the atmospheric properties of the planet. Among the intriguing phenomena observed during these measurements is radio scintillation, marked by rapid flu…
View article: Reprocessing the Pioneer Venus radio occultation data
Reprocessing the Pioneer Venus radio occultation data Open
RIU-Planetary Research is reprocessing original data from the Pioneer Venus Orbiter radio science experiment ORO which were recorded between 1979 and 1988. These valuable raw open-loop data are available from the PDS (Planetary Data System…
View article: M-Matisse Crosslink experiment MaCro: an intersatellite radio link for the sounding of the Martian atmosphere
M-Matisse Crosslink experiment MaCro: an intersatellite radio link for the sounding of the Martian atmosphere Open
The "Mars Magnetosphere ATmosphere Ionosphere and Space-weather SciencE (M-MATISSE)" mission, currently in Phase A study by the European Space Agency (ESA), is a Medium-class (M7) candidate. M-MATISSE aims to unravel the intricate and dyna…
View article: Profiles of the Venusian ionosphere and neutral atmosphere derived from reprocessed Pioneer Venus radio occultation measurements
Profiles of the Venusian ionosphere and neutral atmosphere derived from reprocessed Pioneer Venus radio occultation measurements Open
The radio occultation technique is a powerful tool to probe the vertical structure and composition of Venus' atmosphere. By measuring the bending and attenuation of radio waves as they pass through the planet's ionosphere and neutral atmos…
View article: Radio Sounding of the Venusian Atmosphere and Ionosphere with EnVision
Radio Sounding of the Venusian Atmosphere and Ionosphere with EnVision Open
EnVision has been selected in the M5 call of ESA’s Cosmic Vision program as the next European led mission to Venus. It is dedicated to unravel some of the numerous open questions about Venus' past, current state and future and will h…
View article: Solar Wind—Ionosphere Interface at Mars. Ion Dynamics, Asymmetry, Plasma Jets
Solar Wind—Ionosphere Interface at Mars. Ion Dynamics, Asymmetry, Plasma Jets Open
We report on observations made by the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft, in the shocked solar wind‐ionosphere interface of Mars. We observe a strong asymmetry in plasma flow governed by the direction of the motional…
View article: The mini induced magnetospheres at Mars.
The mini induced magnetospheres at Mars. Open
We report on observations made by the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft at Mars, in the region of the ion plume. We observe that in some cases, when the number density of oxygen ions is comparable to the density of …
View article: The Mini Induced Magnetospheres at Mars
The Mini Induced Magnetospheres at Mars Open
We report on observations made by the Mars Atmosphere and Volatile EvolutioN spacecraft at Mars, in the region of the ion plume. We observe that in some cases, when the number density of oxygen ions is comparable to the density of the sola…
View article: Magnetic Fields and Plasma Motions in a Hybrid Martian Magnetosphere
Magnetic Fields and Plasma Motions in a Hybrid Martian Magnetosphere Open
The Martian magnetosphere contains elements of induced and intrinsic origin. To display them one must use different coordinate systems. Although the solar‐electric coordinate system (Mars Solar Electric [MSE]) adequately describes the main…
View article: Reprocessing Pioneer Venus Orbiter radio occultation data
Reprocessing Pioneer Venus Orbiter radio occultation data Open
<p>RIU-Planetary Reseach has won funding support for the reprocessing and the interpretation of the original raw open-loop occultation data taken by the Pioneer Venus Orbiter radio science experiment ORO from 1979 to 1988. These orig…
View article: The abundance of H2SO4 and SO2 in the Venus atmosphere derived from radio occultation measurements and observed radio scintillations
The abundance of H2SO4 and SO2 in the Venus atmosphere derived from radio occultation measurements and observed radio scintillations Open
<p>Radio occultation measurements at Venus were applied to derive vertical profiles of temperature, pressure, number density and absorptivity in Venus&#8217; atmosphere. For this purpose, an orbiter sounded the planet&#8217;s…