Atmospheric Chemistry and Physics Discussions
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8
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2008
10.5194/acpd-8-11853-2008
http://www.atmos-chem-phys-discuss.net/8/11853/2008/
http://www.atmos-chem-phys-discuss.net/8/11853/2008/acpd-8-11853-2008.html
http://www.atmos-chem-phys-discuss.net/8/11853/2008/acpd-8-11853-2008.pdf
11853
11877
2008-06-13
Limb scatter ozone retrieval from 10 to 60 km using a Multiplicative Algebraic Reconstruction Technique
D. A. Degenstein
doug.degenstein@usask.ca
A. E. Bourassa
C. Z. Roth
E. J. Llewellyn
Institute of Space and Atmospheric Studies, Saskatchewan, Canada
Science Systems and Applications, Inc., Hampton, VA, USA
The OSIRIS instrument onboard the Odin spacecraft routinely measures
vertical profiles of spectrally dispersed, limb scattered sunlight
from the upper troposphere into the lower mesosphere. These measurements are used to
retrieve the ozone number density vertical profile over the altitude range from 10 to 60 km
using the SaskMART Multiplicative Algebraic Reconstruction Technique, which is a one dimensional
modification of an existing two-dimensional tomographic retrieval algorithm. This technique allows
for the consistent merging of the absorption information from radiance measurements at wavelengths
in the Chappuis and the Hartley-Huggins bands at each iteration of the inversion. The effectiveness
of the retrieval is demonstrated using a set of coincident SAGE II occultation measurements that
show a mean bias of less than 2% from 18 to 53 km.
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