Mission Objectives Overview  ===========================    The principal goal of MSX was to collect phenomenology data in    support of ballistic missile defense objectives.  Additional    objectives were to collect data in support of a variety of    civilian science objectives in earth and atmospheric remote    sensing and astronomy.  A full set of experiments mapped the    galactic plane, the IRAS (Infrared Astronomical Satellite) gaps,    the zodiacal background, confused regions away from the galactic    plane, deep surveys of selected fields at high galactic latitudes,    large galaxies, asteroids, and comets.