An artist's rendition of the Midcourse Space Experiment (MSX) spacecraft is depicted in the upper left-hand corner. The spacecraft includes three major sections, each with a 150 X 150 cm cross section. The versatile electronics section features state-of-the-art attitude determination and control, power, command and data handling, communication, and thermal control systems. The midsection graphite epoxy truss supports the solid-hydrogen filled cryogenic dewar of the Spatial Infrared Imaging Telescope III and is thermally designed to maintain the dewar outer shell at approximately 200K. The instrument section houses 11 optical sensors precisely aligned so that target activity can be viewed simultaneously by multiple sensors over a wide range of infrared, visible, and ultraviolet wavelengths. The two small insets at the top show the measurement capabilities of MSX. The lower left-hand inset shows the 2800-kg, 510-cm-long spacecraft during integration and test. Pictured at the very bottom is the APL Richard B. Kerschner Space Integration and Test Facility where MSX was assembled and tested. The smaller building to the right houses the MSX Mission Operations Center, where flight operations following launch will be conducted using the 10-m antenna to the left of the Kerschner Facility. MSX will be launched from Vandenberg Air Force Base, California, by a McDonald Douglas Delta II booster similar to the one pictured in the lower right-hand inset. (Artist's rendition of MSX by Jacob Elbaz and composite illustration by Kenneth Moscati.)

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