The National Aeronautics and Space Administration soon will launch another Explorer satellite to unravel some of the scientific mysteries of how "space weather" affects man's daily life and his future exploration of space. The 89-pound satellite, S-3a, similar to the highly successful Explorer XII placed into orbit last year, will be launched from Cape Canaveral, Fla., no earlier than October 2, using a Thor-Delta rocket. If successful, this will be the 12th straight launch f o r the Delta continuing its unprecedented record for U.S. rocketry
