STS-64 (Space Shuttle Discovery)

STS-64 was a Space Shuttle Discovery mission flown September 9-20, 1994, operated by NASA. Its primary science payload was the Lidar In-Space Technology Experiment (LITE), a three-wavelength backscatter lidar developed at NASA Langley Research Center to demonstrate lidar remote sensing from orbit. LITE collected data on cloud layers, aerosol distributions, and the planetary boundary layer across multiple orbits.^[1][2] The mission flew at approximately 259 km altitude (140 nautical miles per NASA mission documentation) at 57 degrees inclination, enabling measurements over a broad latitudinal range. LITE data were acquired during coordinated ground- and aircraft-based campaigns; the mission was designed to characterise lidar performance in the space environment and generate reference datasets for future atmospheric lidar development. The mission lasted 10 days and 22 hours.^[1][2]