Losat-X (Low Altitude Satellite Experiment) was a test flight of United States Department of Defense sensors as part of the Strategic Defense Initiative. Losat-X was launched alongside Navstar GPS-11. Its main mission was remote sensing using a a multispectral imaging package and a wide field-of-view star camera. Designed for a three-month lifetime, the satellite accomplished its primary objectives in the first 24 hours. The secondary mission objectives were not met, however, due to a failure in the command receiver nine days after launch.