Computer Science – Performance
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa31a..10d&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA31A-10
Computer Science
Performance
0340 Middle Atmosphere: Composition And Chemistry, 0394 Instruments And Techniques
Scientific paper
The InfraRed Imager (IRI) part of the OSIRIS instrument onboard the Odin satellite provides an ideal set of limb images that can be used as input to a two-dimensional tomographic routine. The goal of this procedure is to recover accurately the structure, both in the vertical (altitude) and the horizontal (angle along the satellite track), of the two-dimensional volume emission rate profile that is contained within the orbit plane. Two channels of the IRI simultaneously measures the Oxygen InfraRed Atmospheric (OIRA) band at two separate passbands located around the 1.27 micron band head. A third channel of the IRI also measures the nighttime OH Meinel airglow and daytime scattered sunlight over 40 nm centred around 1.53 microns. The tomographic technique, that was first proposed to deblur Fabry-Perot images and has a historical place in the field of medical imaging, is used to retrieve the two-dimensional volume emission rate profiles associated with scattered sunlight, OH Meinel and the OIRA bands. The routine has been extensively modified to optimize its performance for the specific geometry, a satellite in orbit at 600 km with an inclination of 97 degrees, and peculiarities associated with limb images of both absorbed (OIRA) and non-absorbed (OH Meinel and scattered sunlight) emissions. We discuss the history of this particular tomographic technique with focus on the recent work with the OSIRIS data set.
Bourassa Adam E.
Degenstein Douglas Arthur
Llewellyn Edam J.
Lloyd Nick D.
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