1. The Canadian OSIRIS instrument on the Odin Satellite
11/MAR/99
The Canadian OSIRIS instrument on the Odin Satellite
UNIVERSITÉ
YORK
UNIVERSITY
Ian McDade & the Odin OSIRIS Team
Department of Earth and Space Science
& Engineering
Centre for Research in Earth & Space Science
York University

2. 11/MAR/99
What is Odin? Odin is a joint Swedish/Canadian/French/Finnish small research satellite mission combining investigations in both Aeronomy & Astronomy The Astronomy studies focus on the chemistry of the interstellar medium, comets and star formation The Aeronomy (Atmospheric Science) studies focus on the chemistry and dynamics of the Earth's stratosphere and mesosphere

3. 11/MAR/99
There are two instruments on Odin: (1) A Swedish Sub-Millimeter Radiometer (SMR) which is used for both astronomy and aeronomy (2) A Canadian Optical Spectrograph & IR Imager System (OSIRIS) which is used for atmospheric studies only

4. 11/MAR/99
The Canadian OSIRIS instrument on Odin includes a limb viewing grating spectrometer which measures the radiances of limb scattered sunlight in the wavelength range nm

5. The Odin/OSIRIS viewing geometry
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The Odin/OSIRIS viewing geometry

6. The Odin/OSIRIS viewing geometry
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The Odin/OSIRIS viewing geometry

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The OSIRIS scattered sunlight spectra are used to obtain vertical distributions of O3, NO2, OClO & BrO, with aerosol extinction and temperature & pressure information, throughout the stratosphere and mesosphere

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The OSIRIS layout

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The OSIRIS instrument

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Simulated limb radiance spectra at tangent heights of 20, 40, 60 and 80 km

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Simulated limb radiances in more detail at tangent heights of 20 and 70 km

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• Odin was successfully launched on a Russian START 1 ICBM from Svobodny, Siberia, on 20th Feb, 2001

14. • We at York are now analyzing the OSIRIS data
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• We at York are now analyzing the OSIRIS data

15. So what are we getting from OSIRIS ?
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So what are we getting from OSIRIS ?

16. Sample scan from about 10 to 90 km in tangent height
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Sample scan from about 10 to 90 km in tangent height

17. What we expected (top) and what we are getting (bottom)
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OSIRIS results:
What we expected (top) and what we are getting (bottom)

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EP TOMS
The TOMS total ozone column densities (in Dobson units) measured over the S.H. on the same day (25th September 2002)

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OSIRIS
OSIRIS total ozone column densities (in Dobson units) measured over the S.H. on 25th September 2002 (without tropospheric component)

21. But OSIRIS does more than TOMS and other total ozone mappers
11/MAR/99
But OSIRIS does more than TOMS
and other total ozone mappers
OSIRIS also measures the vertical profile of ozone
not just the total column density of ozone
i.e., OSIRIS adds an important extra dimension - height

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OSIRIS ozone number densities at 10 km measured over the S.H. on 25th September 2002

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OSIRIS ozone number densities at 15 km measured over the S.H. on 25th September 2002

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OSIRIS ozone number densities at 20 km measured over the S.H. on 25th September 2002

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OSIRIS ozone number densities at 25 km measured over the S.H. on 25th September 2002

26. the “ozone hole” region on 24/25 Nov 2001
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OSIRIS southern hemisphere ozone number density profiles measured on 3 orbits passing through
the “ozone hole” region
on 24/25 Nov 2001
The arrows indicate the highest latitude profiles (82ºS)
which were measured at longitudes of ~110, 90 and 70ºE respectively
(see previous slide)

27. 11/MAR/99
Some Odin facts: • The expected mission lifetime is 2 years • The total Odin platform mass is ~235 kg the total payload mass is ~75 kg and the OSIRIS mass is ~10 kg • The total expected mission cost over the first two years is $65 million US = 1$/second

28. 11/MAR/99
The Canadian OSIRIS Team: Ted Llewellyn, P.I., University of Saskatchewan Co-Investigators: Jack McConnell, York University Brian Solheim, York University Ian McDade,York University Wayne Evans, Trent University & York University (adjunct) Kimberly Strong, University of Toronto & York University (adjunct)
UNIVERSITÉ
YORK
UNIVERSITY

29. For more OSIRIS information visit
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For more OSIRIS information visit
and