The overall spacecraft development required major integration to assure that the instruments and spacecraft systems work together as intended. During operations, a central data handling system manages the processing and transfer of scientific data from the spacecraft to investigator sites located throughout the United States, Canada, the United Kingdom and France. The Instruments Of the 10 UARS scientific instruments, nine are designed to conduct the first systematic, comprehensive and detailed satellite investigation of the stratosphere, mesosphere and lower thermosphere. The 10th instrument measures total solar energy output. Operating simultaneously, these 10 instruments constitute a single scientific investigation.
Chlorine monoxide is a key reactant in the chlorine chemical cycle that destroys ozone.
The water vapor measurement component of MLS failed in April 1993, but MLS continues to provide essential chemical observations. The distributions of ozone and the trace gases that affect ozone through chemical interactions are influenced by the winds. The winds transport gases between various atmospheric regions and affect their photochemical behavior. The energy, which produces ozone in the stratosphere and the atmospheric circulation, comes from the sun. The balance between ozone production processes, loss processes, and transport by the winds, produces the ozone layer.