Fast NO2 retrievals from Odin-OSIRIS limb scatter measurements
Artikel i vetenskaplig tidskrift, 2011

The feasibility of retrieving vertical profiles of NO2 from space-based measurements of limb scattered sunlight has been demonstrated using several different data sets since the 1980's. The NO2 data product routinely retrieved from measurements made by the Optical Spectrograph and InfraRed Imaging System (OSIRIS) instrument onboard the Odin satellite uses a spectral fitting technique over the 437 to 451 nm range, over which there are 36 individual wavelength measurements. In this work we present a proof of concept technique for the retrieval of NO2 using only 4 of the 36 OSIRIS measurements in this wavelength range, which reduces the computational cost by almost an order of magnitude. The method is an adaptation of a triplet analysis technique that is currently used for the OSIRIS retrievals of ozone at Chappuis band wavelengths. The results obtained are shown to be in very good agreement with the spectral fit method, and provide an important alternative for applications where the computational burden is very high. Additionally this provides a baseline for future instrument design in terms of cost effectiveness and reducing spectral range requirements.


nitrogen-dioxide concentrations


algebraic reconstruction technique

infrared imager system

stratospheric no2


vertical profiles

optical spectrograph

solar mesosphere explorer


A. E. Bourassa

University of Saskatchewan

C. A. McLinden

Environment Canada

C. E. Sioris

Environment Canada

Samuel Brohede

Chalmers, Rymd- och geovetenskap, Global miljömätteknik

A. F. Bathgate

University of Saskatchewan

E. J. Llewellyn

University of Saskatchewan

D. A. Degenstein

University of Saskatchewan

Atmospheric Measurement Techniques

1867-1381 (ISSN) 1867-8548 (eISSN)

Vol. 4 5 965-972


Meteorologi och atmosfärforskning



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