  Here we aim to separate the two main contributions of slow and fast solar
wind that appear at 1 AU. The Bi-Gaussian function is proposed as the
probability distribution function of the two main components of the solar wind.
The positions of the peaks of every simple Gaussian curve are associated with
the typical values of every contribution to solar wind. We used the entire data
set from the Advanced Composition Explorer (ACE) mission in an analysis of the
data set as a whole and as yearly series. Solar cycle dependence is considered
to provide more accurate results for the typical values of the different
parameters. The distribution of the solar wind at 1 AU is clearly bimodal, not
only for velocity, but also for proton density, temperature and magnetic field.
New typical values for the main parameters of the slow and fast components of
the solar wind at 1 AU are proposed.
