Studies of the sun, the upper reaches of Earth's atmosphere and astronomical objects using an international array of instruments in Atlantis' cargo bay will highlight Shuttle Mission STS-45.
Atlantis ... will carry the Atmospheric Laboratory for Applications and Science-1 (ATLAS-1), 12 instruments from the United States, France, Germany, Belgium, Switzerland, the Netherlands and Japan, that will conduct 13 experiments to study the chemistry of the atmosphere, solar radiation, space plasma physics and ultraviolet astronomy. ATLAS-1 is planned to be the first of several ATLAS flights designed to cover an entire 11-year solar cycle, the regular period of energetic activity by the sun. Co- manifested with ATLAS-1 is the Shuttle Solar Backscatter Ultraviolet Instrument (SSBUV), which provides highly calibrated measurements of ozone to fine-tune measurements made by other NASA and NOAA satellites.
[Summary provided by NASA]