O2 dayglow and
mesospheric O3 using
Odin-IRIS
Anqi Li, Donal Murtagh,
Chris Roth, Adam Bourassa, Doug Degenstein
Chalmers University of Technology
University of Saskatchewan
Odin components
OS
IRIS
SMR
OSIRIS
Optical Spectralgraph
InfraRed Imaging System
Sub-Millimetre Radiometer
since 2001
Why do we look at IRIS?
- New data product from Odin
- Mesospheric ozone
- Similar geometry to an upcoming mission -- MATS
- Practise retrieval algorithm
IRIS in a nutshell
> 100 pixels vertically
O2(1Δ) at 1.27 μm
O_2 (^1 \Delta)
Limb radiance
Clip!
Limb radiance / photons cm-2 s-1 sr-1
1D inversion
Column emission rate --> Volume emission rate
1D inversion result
Maximum a posteriori (MAP) method
Dayglow only
Triple layers struct.
Volume emission rate / photons cm-3 s-1
Kinetic model
O2
O
O_3
O(^1D)
O_2 (^1 \Sigma)
O_2 (^1 \Delta)
O_2 (^1 \Delta) -> O_3
Ozone comparison
Night part
Ozone comparison
Coincidence profile
Ozone comparison
Paper in preparation...
Seasonal
Odin Science Meeting 2019
By ankiki
