Grün, E., P. Staubach, M. Baguhl, D.P. Hamilton, H.A. Zook,
S.F. Dermott, B.A. Gustafson, H. Fechtig, J. Kissel, D. Linkert,
G. Linkert, R. Srama, M.S. Hanner, C. Polanskey, M. Horanyi,
B.-A. Lindblad, I. Mann, J.A.M. McDonnell, G.E. Morfill and G.
Schwehm. South-north and radial traverses through the
zodiacal cloud. Icarus 129,
Identical dust detectors are flown on board the Galileo and Ulysses
spacecraft. They observe dust in the ecliptic plane from r = 0.7 to r =
5.4 AU heliocentric distance and in a plane almost perpendicular to
the ecliptic from ecliptic latitude lambda = -80 to lambda = +80 deg.
Interstellar dust grains of up to micron-sizes dominate the
measurements in the outer solar system, r > 3 AU, and at latitudes
lambda > 30 deg. bigger (1 to 10 micron-sized) interplanetary
meteoroids where found predominantly inside that distance and closer
to the ecliptic plane. The combination of both the Ulysses and Galileo
data sets allows us to determine the radial and latitudinal distributions
of these dust populations. It is found that interstellar dust grains
penetrate undepleted the solar system at least down to 1.3 AU
distance from the sun and that they contribute about 30% to the total
dust flux observed there.
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