Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsm44a..01c&link_type=abstract
American Geophysical Union, Spring Meeting 2004, abstract #SM44A-01
Physics
2459 Planetary Ionospheres (5435, 5729, 6026, 6027, 6028), 2780 Solar Wind Interactions With Unmagnetized Bodies, 5435 Ionospheres (2459), 5440 Magnetic Fields And Magnetism, 6225 Mars
Scientific paper
As Mars Global Surveyor orbits Mars, it crosses into different plasma regimes, as is evident by the electron spectra obtained by the Electron Reflectometer (ER). Below about 380 km, the electron spectra are dominated by locally produced photoelectrons indicating the solar wind electrons do not have access to that region. We investigate the appearance of this electron signature at altitudes above the observed photoelectron boundary height. These may be detached high altitude ionospheric clouds, analogous to those observed at Venus by the Pioneer Venus Orbiter. Like at Venus, we are unable to distinguish the morphology of the clouds with a single cut through at any given time. However, we analyze their occurrence rates as a function of position and upstream parameters to understand the conditions under which they occur.
Acuña Mario Humberto
Crider Dana Hurley
Mitchell David Leroy
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