TOMS (Total Ozone Mapping Spectrometer)
Originally intended for launch in 1994, TOMS-EP (Earth Probe) was delayed by failures of the first two Pegasus XL launch vehicles. As a result, TOMS-EP flew simultaneously with the ADEOS TOMS instrument (originally planned as TOMS-EP's successor). To prevent gathering redundant information, TOMS-EP was placed into an orbit lower than originally planned to obtain higher resolution measurements and data that was complementary to that gathered by ADEOS. When TOMS-EP began to show signs of premature aging, NASA ordered QuikTOMS as a gap-filler until ozone monitoring could be taken over by the EOS (Earth Observing System) Aura satellite in 2004. However, the fifth flight of TOMS ended in failure on Sep. 21, 2001, when the Taurus rocket carrying the 162-kg QuikTOMS (and also OrbView-4 ) broke up less than two minutes after liftoff.
Related category SATELLITES AND SPACE PROBES
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