The Space Shuttle Orbiter, in addition to serving as a transportation system, has proven to be a valuable test platform for science and applications space sensor systems. In low earth orbit the Shuttle can manuever into a variety of orientations for sensor pointing purposes. An astronaut, trained in the use, evaluation, and testing of the specific system, can make real-time adjustments to the system involved. In some cases, the astronaut could perform hands-on sensor repairs in the payload bay. Of extreme importance is the ability of the Shuttle to bring the sensor back to earth where laboratory assessments can continue sensor evaluation or establish cause of failure.