Spacecraft Description: DeepSpace-5.
One of the candidate mission is Geostorms, which involves solar wind observation and a solar sail. The solar sail will be 67 meters on a side. Geostorms is a combined NOAA, JPL, and U.S.A.F. Phillips Laboratory project.
References: "Solar Sails Concept Unfurls", SN Oct. 20-26, 1997, p. 15.