KSC-97EC-1568 - USMP-4 final processing in SSPF before move to LC 39B United States Microgravity Payload-4 (USMP-4) experiments are lifted atop the white triangular Multi-Purpose Experiment Support Structure at Kennedy Space Center (KSC) before placement into the payload canister. The vertical tube in the center of the photo is the Advanced Automated Directional Solidification Furnace (AADSF), which will be used by researchers to study the solidification of semiconductor materials in microgravity. Scientists will be able to better understand how microgravity influences the solidification process of these materials and develop better methods for controlling that process during future Space flights and Earth-based production. To its left is a horizontal white tube known as MEPHISTO, the French acronym for a cooperative American-French investigation of the fundamentals of crystal growth. The USMP-4 will launch aboard the Space Shuttle Columbia as part of the STS-87 mission, scheduled for launch Nov. 19. 10/29/97