| Abstract |
WIND is a NASA/GSFC solar-terrestrial mission within the US GGS (Global Geospace Science) initiative and also part of the ISTP (International Solar-Terrestrial Physics) program. The objective is to study sources, acceleration mechanisms and propagation processes of energetic particles and the solar wind. Investigation of solar wind mass momentum and energy) with input first from the day-side double lunar swingby orbit, and later from a small halo orbit at L1. WIND, together with GEOTAIL (ISAS, Japan, launch 1992), Polar (NASA, launch 1996), SOHO (ESA/NASA, launch 1995), and the Cluster constellation spacecraft (ESA, launch 2000), constitute the cooperative scientific ISTP program.
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