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Título:
Martian Shock and Magnetic Pile-up Boundary Positions and Shapes Determined from the Phobos 2 and Mars Global Surveyor Data sets
Autor/es:
TROTIGNON, J.; MAZELLE, C.; BERTUCCI, C.; ACUNA, M.
Reunión:
Congreso; AGU Fall Meeting 2004; 2004
Resumen:
A great many Martian bow shock and magnetic pile-up boundary crossings
have been identified in the Phobos 2 and Mars Global Surveyor, MGS,
data. From these observations the positions and shapes of the bow shock
and magnetic pile-up boundary, MPB, have been derived and modelled,
using curve-fitting techniques. The models thus derived separately from
the Phobos 2 and MGS data sets do not differ drastically, despite the
different time and space data coverages. The purpose of the presentation
is therefore to show the results obtained from the mixing of the Phobos
2 and MGS data bases and to compare the derived bow shock and MPB models
with the ones obtained previously. The underlying objective was to see
whether it was possible to determine improved bow shock and MPB models
or not. The answer is definitely yes, and particularly for the MPB,
thanks to the complementary nature of the Phobos 2 and MGS
observations. The boundaries crossed close to the subsolar direction or
mostly far downstream by Phobos 2 indeed allow a better coverage of the
Martian space environment to be considered. Nevertheless, in order to
reduce the domination of the overabundant MGS data set and/or the
crossings that are close to Mars, weighting factors have been
introduced.