The%20Canadian%20OSIRIS%20instrument%20on%20the%20Odin%20Satellite

1
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
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
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
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
5
The Odin/OSIRIS viewing geometry
6
The Odin/OSIRIS viewing geometry
7
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
8
(No Transcript)
9
The OSIRIS layout
10
The OSIRIS instrument
11
Simulated limb radiance spectra at tangent
heights of 20, 40, 60 and 80 km
12
Simulated limb radiances in more detailat
tangent heights of 20 and 70 km
13
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
15
So what are we getting from OSIRIS ?
16
Sample scan from about 10 to 90 km in tangent
height
17
OSIRIS results What we expected (top) and what
we are getting (bottom)
18
(No Transcript)
19
EP TOMS
The TOMS total ozone column densities (in Dobson
units) measured over the S.H. on the same day
(25th September 2002)
20
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 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
22
OSIRIS ozone number densities at 10 km measured
over the S.H. on 25th September 2002
23
OSIRIS ozone number densities at 15 km measured
over the S.H. on 25th September 2002
24
OSIRIS ozone number densities at 20 km measured
over the S.H. on 25th September 2002
25
OSIRIS ozone number densities at 25 km measured
over the S.H. on 25th September 2002
26
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
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
The Canadian OSIRIS TeamTed Llewellyn,
P.I., University of Saskatchewan
Co-InvestigatorsJack 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 YORK UNIVERSITY
29
For more OSIRIS information visit
http//www.osiris.yorku.ca and
http//www.ssc.se/ssd/odin