Cassini Saturn Probe Undergoes Preflight Testing

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KENNEDY SPACE CENTER, FLA. -- At Astrotech Space Operations in Titusville, Fla., technicians are preparing one of five THEMIS probes to be secured inside a shipping container (behind it). The probes are being moved to the hazardous processing facility where they will be placed on a stand in preparation for fueling operations. Once fueling is complete, each probe will be weighed and individually mated to the payload carrier before pyrotechnics are installed. The fully integrated THEMIS payload is then ready for spin-balance testing and weighing. The final milestone is mating THEMIS to its upper stage booster. THEMIS consists of five identical probes, the largest number of scientific satellites ever launched into orbit aboard a single rocket. This unique constellation of satellites will resolve the tantalizing mystery of what causes the spectacular sudden brightening of the aurora borealis and aurora australis - the fiery skies over the Earth's northern and southern polar regions. These lights are the visible manifestations of invisible energy releases, called geomagnetic substorms, in near-Earth space. THEMIS will not only seek to answer where and when substorms start, but will also provide clues as to how and why these space storms create havoc on satellites, terrestrial power grids, and communication systems. THEMIS will be transported to Pad 17-B at Cape Canaveral Air Force Station on February 1 for mating to the Delta II rocket. Launch is scheduled for Feb. 15. Photo credit: NASA/George Shelton KSC-06pd2812

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Cassini Saturn Probe Undergoes Preflight Testing

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(October 31, 1996) The newly assembled Cassini Saturn probe undergoes vibration and thermal testing at the JPL facilities in Pasadena, California. Subjected to weeks of "shake and bake" tests that imitate the forces and extreme temperatures the spacecraft will experience during launch and spaceflight. Cassini's mission is to orbit Saturn for four years and study the planet, its rings and moons in detail. The large moon Titan is a principal target for exploration, and Cassini will carry the Huygens probe, (gold-mylar circular object seen here mounted on the front of the spacecraft) to be released to enter Titan's thick atmosphere and descend to the surface via parachute. The Huygens probe is provided by the European Space Agency (ESA) and the radio antenna at top was provided by the Italian Space Agency (ASI). The project is a joint endeavor of NASA, the European Space Agency and the Italian Space Agency. JPL manages the program for NASA's Office of Space Science, Washington, DC. ..Image # : p48313bc