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The Delta II on the Eve of Launch

The Delta II on the Eve of Launch

The mobile service tower has been rolled back at Launch Complex 17, Pad A, to prepare for launch of NASA's Rossi X-ray Timing Explorer (RXTE) spacecraft atop the Delta 230 expendable launch vehicle. Once lofted into orbit, the RXTE spacecraft will embark on an approximately two-year mission to carry out an in-depth study of x-ray sources in the universe. The Delta 230 is built by McDonnell Douglas Aerospace and is a Delta I 7920-configuration vehicle. It features a new advanced technology avionics system that offers improved reliability at reduced cost. The RXTE vehicle and launch services are being provided by McDonnell Douglas under a Medium Expendable Launch Vehicle contract with NASA.