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

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

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

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 300 - 800 nm

The Odin/OSIRIS viewing geometry 11/MAR/99 The Odin/OSIRIS viewing geometry

The Odin/OSIRIS viewing geometry 11/MAR/99 The Odin/OSIRIS viewing geometry

11/MAR/99 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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11/MAR/99 The OSIRIS layout

11/MAR/99 The OSIRIS instrument

11/MAR/99 Simulated limb radiance spectra at tangent heights of 20, 40, 60 and 80 km

11/MAR/99 Simulated limb radiances in more detail at tangent heights of 20 and 70 km

11/MAR/99 • Odin was successfully launched on a Russian START 1 ICBM from Svobodny, Siberia, on 20th Feb, 2001

• We at York are now analyzing the OSIRIS data 11/MAR/99 • We at York are now analyzing the OSIRIS data

So what are we getting from OSIRIS ? 11/MAR/99 So what are we getting from OSIRIS ?

Sample scan from about 10 to 90 km in tangent height 11/MAR/99 Sample scan from about 10 to 90 km in tangent height

What we expected (top) and what we are getting (bottom) 11/MAR/99 OSIRIS results: What we expected (top) and what we are getting (bottom)

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11/MAR/99 EP TOMS The TOMS total ozone column densities (in Dobson units) measured over the S.H. on the same day (25th September 2002)

11/MAR/99 OSIRIS OSIRIS total ozone column densities (in Dobson units) measured over the S.H. on 25th September 2002 (without tropospheric component)

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

11/MAR/99 OSIRIS ozone number densities at 10 km measured over the S.H. on 25th September 2002

11/MAR/99 OSIRIS ozone number densities at 15 km measured over the S.H. on 25th September 2002

11/MAR/99 OSIRIS ozone number densities at 20 km measured over the S.H. on 25th September 2002

11/MAR/99 OSIRIS ozone number densities at 25 km measured over the S.H. on 25th September 2002

the “ozone hole” region on 24/25 Nov 2001 11/MAR/99 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)

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

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

For more OSIRIS information visit 11/MAR/99 For more OSIRIS information visit http://www.osiris.yorku.ca and http://www.ssc.se/ssd/odin