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Showing 1 to 17 of 17 for “"Martian atmosphere"”.
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Vertically Propagating Tides in the Martian Atmosphere
… influence the dynamics of Mars' upper atmosphere. The impact of tides on the mean state of the present-day Martian atmosphere is especially large at high altitudes. Certain tides can propagate away from the region of generation in the lower atmosphere and reach the upper atmosphere, …
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The role of C-O-H volatiles in the martian mantle and the production of the martian atmosphere.
… suggests that liquid water was once eroding the martian surface at rates comparable to many climates on present-day Earth. However, the thin modern martian atmosphere does not support liquid water. The fundamental variable in the evolution of the martian atmosphere is the storage of C-O-H …
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Examining the response of the Martian atmosphere to increases in different portions of the electromagnetic spectrum during solar flares
… describes the methods used to examine how the Martian atmosphere responds to increases in different portions of the electromagnetic spectrum during solar flares. On March 24, 2015 the Mars Atmosphere and Volatile Evolution (MAVEN) mission satellite made measurements of the atmosphere and solar …
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Escape of hydrogen from the exosphere of Mars
After decades of exploration, the martian neutral hydrogen exosphere has remained poorly characterized. The first measurements of this layer by Mariner 6 and 7 revealed it to be optically thick in Lyman α emission, along with a characteristic temperature that was higher than the majority of the …
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Steady-State and Transient Thermal Modeling of Solid Electrolysis (SOXE) within the Mars Oxygen In-Situ Resource Utilization Experiment
… The Mars Perseverance Rover, which landed on the Martian surface on 18 February, 2021, contained the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) as an experimental payload to demonstrate the capabilities of in-situ resource utilization by producing oxygen (O2) out of the abundant …
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System modeling, design, and control of the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) and implications for atmospheric ISRU processing plants
… carbon dioxide that comprises nearly 96% of the Martian atmosphere can be utilized to produce oxygen for propulsion and life support systems. The Mars Oxygen ISRU Experiment (MOXIE) is a payload being developed by NASA for the Mars 2020 mission. MOXIE will demonstrate oxygen production at a rate …
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Composition sensors calibration and characterization and warmup analysis for the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE)
… another planet by extracting O₂ from CO₂ in the Martian atmosphere using solid oxide electrolysis (SOE). In order to inform and control its system, MOXIE has a set of temperature, pressure, and composition sensors that measure its internal gas flows. The four composition sensors are commercial …
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Laboratory Characterization of Mars In-Situ Resource Utilization (ISRU) using the Mars Oxygen ISRU Experiment (MOXIE) FlatSat Testbed
… oxide electrolysis of carbon dioxide in the Martian atmosphere. MOXIE has successfully generated oxygen on Mars 14 times since landing in February 2021 and will continue to demonstrate oxygen production during night and day throughout all Martian seasons. As opportunities to run MOXIE on Mars …
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Plasma-based CO₂ Conversion for Mars ISRU
… Utilization (ISRU). The abundant CO₂ in the Martian atmosphere can be converted into breathable oxygen and fuel for astronauts, enabling safer and more independent Mars missions while reducing launch costs. Nonthermal plasma technologies leverage electron excitation chemistry to achieve …
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Study of the Martian upper atmosphere using radio tracking data
Since the first in situ observations of the Martian atmosphere were made by the twin Viking landers, we have learned considerably more about its composition, dynamics and variability. Not only did the new data on global atmospheric densities generate opportunities to understand the atmospheric …
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Radiative Transfer in the Martian Environment: In-Situ Results from the MSL Curiosity Rover and Laboratory Experimentation on Martian Regolith and Crystalline Rock Analogs
… crater floor to be estimated numerically. The atmosphere within the crater is shown to be relatively dust free compared to the amount of dust inferred in the atmospheric column, suggesting little mixing between the upper and lower layers. The dust within the crater appears to be well mixed …
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Measurement of Continuum Breakdown Using a Disc Spin-Down Experiment in Low Pressure Air
… for future space missions to Mars because the Martian atmosphere contains carbon dioxide predominantly and a lower TMAC suggests lower atmospheric drag on space vehicles.
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Growth and Survivability of Microorganisms at Martian Temperatures and Pressures
<p>The discovery of methane in the martian atmosphere via numerous ground- and space-based sources has prompted the study of methanogens as models for life on Mars. Methanogens are microorganisms within the domain Archaea, many of which utilize carbon dioxide (CO2) and hydrogen to produce methane. …
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Theoretical Prediction of Electronically Excited States and Vibrational Frequencies of Interstellar and Planetary Radicals, Anions, and Cations
… medium and extraterrestrial planetary atmospheres, theoretical methods continue to be an invaluable tool to astronomically minded chemists. Using state-of-the art methods, this doctoral work characterizes the electronically excited states of interstellar radicals, cations, and even rare …
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Mars Precision Entry Vehicle Guidance Using Internal Moving Mass Actuators
… deceleration is challenging due to the thin Martian atmosphere, large changes in free stream conditions during entry, and aerothermal and aerodynamic instability concerns associated with control systems with direct external flow field interaction. Such risks have descoped past Mars missions …
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Characterization of Microwave Cavity Discharges in a Supersonic Flow
… flowing microwave discharge to validate Martian atmospheric entry models and explore the prospect of harvesting Martian entry plasma. The interactions between the Martian atmosphere and the Mars Landers have been a challenging issue from the very beginning of Mars exploration. During the …
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Remote sensing of ion-neutral charge exchange and diffusive transport in planetary atmospheres
Planetary atmospheres are the envelope of gases that encircle a planet. This region is constantly interacting with energy and particles from the Sun and exhibits variability in its composition, structure, and evolution over periods ranging from hours to years. Through the loss of water to space, …