Scientific Colloquium
January 14, 2005

The Aura satellite is the third and last of the big EOS observatories whose primary
mission is the study of the composition of the Earth's atmosphere.  Aura was
launched July 15, 2004  in to polar sun-synch orbit 15 minutes behind Aqua.   I will
give an overview of the mission and show some early results from the instruments.
These results include the first comprehensive chemical picture of the Antarctic ozone hole,
and the first day-to-day global measurements of tropospheric NO2, a pollutant and precursor for
tropospheric ozone.