Mission Control Center STS-64 Status Report #1 & # 2 Saturday, Sept. 10, 9 a.m. CST Payload activities on board the Space Shuttle Discovery will pick up today as the STS-64 crew begins its second day in orbit. Discovery's six-astronauts started Flight Day 2 to a parody of a Beach Boys tune called "We'll Have Fun, Fun, Fun on the Shuttle," sung by Mach 25. Before crew members went to sleep, the Lidar In-space Technology Experiment, STS-64's primary payload, was activated and reported to be in good working condition. Experiment controllers reported that they were receiving "terrific looking returns." LITE will be used during the course of the mission to collect atmospheric data with a laser system to measure clouds, particles in the atmosphere and the Earth's surface. This information will help scientists explain the impact of human activity on the atmosphere. A new materials processing facility called ROMPS for Robotic Operated Materials Processing System also was activated yesterday and ran throughout the night. ROMPS will process crystals in microgravity by transporting a variety of semiconductors from storageracks to furnaces for processing. Today Mission Specialist Susan Helms will power up Discovery's robot arm to work with the Shuttle Plume Impingement Flight Experiment, also known as SPIFEX. The experiment consists of a 33-foot long beam that will be used to characterize and measure the plumes of the steering jets. SPIFEX will be maneuvered on the end of the robot arm to take measurements of 86 separate jet firings. This information will be used by engineers determine the effects of thrusters on large space structures such as the International Space Station. Crew members also will set up their ham radio equipment to support the Shuttle Amateur Radio Experiment. Discovery is performing without any major system anomaly as it makes its 19th flight. It is orbiting in a 140 x 141 n.m. orbit, circling the Earth every 90 minutes.