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VANDENBERG AIR FORCE BASE, CALIF. -- The probe carrier assembly on the THEMIS spacecraft is prepared for a vibration test. The assembly has solar array covers attached. THEMIS, which stands for Time History of Events and Macroscale Interactions during Substorms, comprises five identical probes that will study the dynamic and colorful eruptions of auroras. THEMIS is scheduled to launch Oct. 19 from Cape Canaveral Air Force Station in Florida.
