TOMS-EP was a NASA Earth Probe mission dedicated to extending the global ozone record begun by earlier Total Ozone Mapping Spectrometer instruments. By comparing incoming solar ultraviolet light with radiation scattered back from Earth's atmosphere, it mapped total-column ozone, the Antarctic ozone hole, ultraviolet-absorbing aerosols, and sulfur-dioxide plumes at improved spatial resolution.
Alerts are unavailable because this mission is no longer active.