The SMS instrument onboard the Wind spacecraft consists of
three different sensors: the Solar Wind Ion Spectrometer (SWICS), the
High Mass Resolution Spectrometer (MASS), and the Supra-Thermal Ion
Composition Spectrometer (STICS). The primary goal of
the SMS instrument is to study the composition of the solar wind and
of solar and interplanetary energetic particles. This experiment is
providing information about the formation of the solar wind and about
events on the solar surface.
The WIND spacecraft was launched on November 1, 1994 from Cape
Canaveral Air Station into a complex orbit which has included petal
orbits in and out of the Earth's magetosphere and a few other
interesting features (details).
In May 2004, WIND joined ACE and SOHO in a halo orbit around L1.