Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39...89g&link_type=abstract
(Colloquium on Phobos-Mars Mission, Paris, France, Oct. 23-27, 1989, Proceedings. A91-29558 11-91) Planetary and Space Science (
Astronomy and Astrophysics
Astronomy
37
Energy Spectra, Mars Probes, Onboard Equipment, Phobos, Plasma Waves, Electron Plasma, Plasma Density, Solar Wind, Spaceborne Astronomy, Mars, Plasma Waves, Pws Instrument, Spacecraft Observations, Electrons, Phobos 2 Mission, Density, Electrical Field, Oscillations, Upstream, Bow Shock, Solar Wind, Magnetosheath, Magnetopause, Altitude, Spectra, Electromagnetic Waves, Frequencies, Emissions, Electrostatic Effects, Atmosphere, Diagrams, Boundaries, Comparisons
Scientific paper
The Plasma Wave System (PWS) onboard the Phobos 2 collected data which revealed the high variability of the Martian environment in the sunward hemisphere during successive orbits. The PWS recorded the spectra of natural waves and measured the plasma density distribution using a Langmuir probe. Measurements are based on data collected around the periapsis of the first four orbits around Mars. Electron plasma oscillations are observed upstream of the bow shock and the shock foot and/or ion foreshock are detected on each orbit. The downstream solar wind, in the planetosheath, is characterized by increased plasma density and broadband electrostatic noise. A comparison between the times of the bow shock and planetopause crossings observed with various instruments is given.
Grard Rejean
Klimov Stanislav
Nairn Carol
Pedersen Andreas
Savin Sergei
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