OSIRISOSIRIS on

The Canadian OSIRIS instrument on the The Canadian OSIRIS instrument on the Odin SatelliteOdin Satellite

UNIVERSITÉ

YORKUNIVERSITY

Ian McDade & the Odin OSIRIS Team

Department of Earth and Space Science & Engineering

Centre for Research in Earth & Space Science

York University

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What is What is OdinOdin?? OdinOdin is a joint Swedish/Canadian/French/Finnish

small research satellite mission combining investigations in both

Aeronomy & Astronomy

The AstronomyAstronomy studies focus on the chemistry of the interstellar medium, comets and star formation

The AeronomyAeronomy (Atmospheric Science) studies focus on the chemistry and dynamics of the Earth's stratosphere and

mesosphere

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There are two instruments on OdinOdin:

(1)(1) A Swedish SSubub-MMillimeter illimeter RRadiometer (adiometer (SMRSMR)) which is used for both astronomy and aeronomy

(2)(2) A Canadian OOptical ptical SSpectrograph pectrograph && IR IIR Imager mager SSystem (ystem (OSIRISOSIRIS) )

which is used for atmospheric studies only

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The Canadian OSIRISOSIRIS instrument on OdinOdin includes a limb viewing grating spectrometer

which measures the radiances of limb scattered sunlight in the wavelength range

300 - 800 nm

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The Odin/OSIRISOdin/OSIRIS viewing geometry

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The Odin/OSIRISOdin/OSIRIS viewing geometry

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The OSIRISOSIRIS 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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OSIRISOSIRIS onThe OSIRISOSIRIS layout

OSIRISOSIRIS onThe OSIRISOSIRIS 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 detailat tangent heights of 20 and 70 km

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• OdinOdin was successfully

launched on a Russian

START 1 ICBM from Svobodny,

Siberia, on

20th Feb, 2001

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• We at York are now analyzing the OSIRISOSIRIS

data

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So what are we getting from OSIRIS OSIRIS ?

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Sample scan from about 10 to 90 km in tangent height

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OSIRISOSIRIS results:

What we expected (top) and what we are getting (bottom)

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0

10

20

30

40

50

0 1x1012

2x1012

3x1012

4x1012

5x1012

OSIRIS (SZA = 84o, = 81

o)

O3 sonde (Spitsbergen)

OSIRIS (SZA = 67o, = 92

o)

O3 sonde (Canary Islands)

O3 density [cm-3]

Alti

tude

[km

]

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

EP TOMSEP TOMS

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

OSIRISOSIRIS

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But OSIRISOSIRIS does more than TOMS and other total ozone mappers

OSIRISOSIRIS also measures the vertical profile of ozone not just the total column density of ozone

i.e., OSIRISOSIRIS 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

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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)

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Some OdinOdin facts:

• The expected mission lifetime is 2 years

• The total OdinOdin platform mass is ~235 kg235 kg the total payload mass is ~75 kg75 kg and the OSIRISOSIRIS mass is ~10 kg10 kg

• The total expected mission cost over the first two years is $65$65 million US = 1$/second

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The Canadian OSIRISOSIRIS Team:

Ted Llewellyn, P.I., University of Saskatchewan

Co-Investigators:

Jack McConnell, York UniversityBrian Solheim, York University

Ian McDade,York University Wayne Evans, Trent University & York University (adjunct)

Kimberly Strong, University of Toronto & York University (adjunct)

UNIVERSITÉ

YORKUNIVERSITY

OSIRISOSIRIS on

For more OSIRISOSIRIS information visit

http://www.osiris.yorku.cahttp://www.osiris.yorku.ca

and http://www.ssc.se/ssd/odinhttp://www.ssc.se/ssd/odin