SWFITEM: Solar Wind Fitting for Investigations of Thermodynamics and Energetics at Mars - A MAVEN dataset
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission provides detailed solar wind data at Mars. This study refines measurements of solar wind plasma, including H+ and He2+ populations, for a clearer understanding of the near-Mars environment.
Area Of Science
- Space Science
- Planetary Science
- Plasma Physics
Background
- The solar wind is a crucial factor influencing planetary atmospheres and space weather.
- Understanding the solar wind's interaction with Mars is vital for studying its atmospheric evolution.
- Previous studies lacked detailed, calibrated solar wind composition data at Mars.
Purpose Of The Study
- To develop a robust dataset of solar wind plasma properties at Mars.
- To calibrate measurements from the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission's instruments.
- To provide a comprehensive timeline of solar wind conditions influencing the Martian environment.
Main Methods
- Reduced ion measurements from MAVEN's Solar Wind Ion Analyzer (SWIA) using magnetic field data.
- Applied a fitting scheme with bi-kappa distribution functions to derive 13 macroscopic plasma parameters.
- Calibrated SWIA data using sporadic plasma frequency measurements from the Langmuir Probe and Waves (LPW) instrument.
Main Results
- Successfully separated and characterized solar wind H+ core, H+ beam, and He2+ (alpha) populations.
- Achieved ground-truthed and instrument-corrected solar wind data.
- Generated a rich dataset detailing solar wind composition, velocities, temperature anisotropies, and differential drifts at Mars.
Conclusions
- The refined MAVEN dataset offers unprecedented insights into the solar wind at Mars.
- This data is crucial for understanding plasma processes in the near-Mars environment.
- The methodology provides a framework for analyzing similar space plasma data.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
Related Concept Videos
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
Since N is dimensionless and the unit of f(v) is seconds per meter, the equation can be conveniently modified into a differential form:
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
Maxwell's thermodynamic relations are very useful in solving problems in thermodynamics. Each of Maxwell's relations relates a partial differential between quantities that can be hard to measure experimentally to a partial differential between quantities that can be easily measured. These relations are a set of equations derivable from the symmetry of the second derivatives and the thermodynamic potentials.
All thermodynamic potentials are exact differentials. Therefore, their second-order...
Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
When an ideal gas is compressed adiabatically, that is, without adding heat, work is done on it, and its temperature increases. In an adiabatic expansion, the gas does work, and its temperature drops. Adiabatic compressions actually occur in the cylinders of a car, where the compressions of the gas-air mixture take place so quickly that there is no time for the mixture to exchange heat with its environment. Nevertheless, because work is done on the mixture during the compression, its...