TOMS-EPTotal Ozone Mapping Spectrometer - Earth Probe
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TRW built the 650-pound satellite and integrated the TOMS-EP instrument as a part of NASA's Earth Science enterprise initiative to gather data on the global environment.
Scientists use TOMS-EP data in conjunction with the atmospheric chemistry measurements from other satellites to understand the processes that drive the global creation, destruction and distribution of the Earth's ozone layer.
As part of its ozone mapping mission, TOMS-EP will also measure sulfur dioxide released in volcanic eruptions.