Odin/SMR Project Portal

Version 3 released 2020-10-30

We are happy to announce the release of version 3 of the Odin dataset.

This work has been supported by ESA and has involved the following:

  • A complete reprocessing of the level 0 data to level 1. This included an improved algorithm for selection of background spectra for calibration, a time and temperature dependent frequency correction and automated removal of baseline.
  • An upgraded level 2 processing scheme where mesospheric and stratospheric products were treated separately with optimised retrieval settings and where necessary improved spectroscopic parameters.
  • A comprehensive validation exercise against other instruments.
Some highlights include:
  • Recovery of the mesospheric carbon monoxide dataset for the entire mission where a failed phase locked loop had caused the frequency to drift and processing failure.
  • A greatly improved ozone dataset.
  • Better consistency between the two mesospheric water vapour products.

Odin launch

Warning for FM 01 for 2010–2018

Users are warned that data from FM 01 may be unreliable between early 2010 and January 2018 due to a misbehaving local oscillator in the instrument.

This has manifested itself by introducing asymmetric and broadened line shapes resulting in too low ozone and chlorine monoxide values. We are looking at ways to mitigate the effect but until then please use FM 01 data with caution.

Odin exploded view

Documentation updated 2020-03-11

The Odin reprocessing project is soon to be closed, we have reprocessed all data from the mission and updated the documents that describes the datasets and the algorithms used to process the data.

All documents can be found here.

Odin at work

NO empirical model SANOMA

Warning to users 2022-06-30

We have noticed an error in the provided model coefficients, which turn out to be different from the version used in the article referred below. We advise against using the model until further notice. Sorry for the inconvenience.

SANOMA is an empirical model of nitric oxide in the upper mesosphere and lower thermosphere, based on Odin/SMR measurements. It provides the NO number density as a function of magnetic latitude (from -82.5 to +82.5 degrees) and altitude (from 85 to 118 km) for any day under consideration. Basic instructions on how to use this model, as well as the associated coefficients, are available on this web page. These files are provided in MATLAB format. The coefficients are also available in text format for those who do not have MATLAB.

We refer the users to the article "An empirical model of nitric oxide in the upper mesosphere and lower thermosphere based on 12 years of Odin-SMR measurements", by J. Kiviranta, K. Pérot, P. Eriksson and D. Murtagh, published in Atmospheric Chemistry and Physics in 2018, for further details. If you wish to use this model, or for any other question about it, please contact Kristell Pérot (kristell.perot@chalmers.se),

Odin making progress

ESA mesosphEO project

Between 2014 and 2017, the SMR team took part in the ESA MesosphEO project, whose goal was to provide the atmospheric science community with a comprehensive data set of Level 2–3 covering a time period of at least 10 years from satellite instruments on the Envisat, Odin and SCISAT platforms. A common file format and variable names have been used for all the project’s data products, making them easy to use. Merged mesospheric products, including SMR H2O and temperature observations, have also been created. All data are available on the project’s data service page together with product specification documents.

The project participants have also produced a number of mesospheric overviews and surveys, as well as a user requirement definition document for mesospheric observations. All these documents are available on the project website.

ESA MesosphEO

Monitoring the sky from above

The Odin satellite was launched in February 2001 and was designed to combine two scientific disciplines on a single spacecraft for studying of star formation and the early solar system (astronomy) and the mechanisms behind the depletion of the ozone layer in the Earth's atmosphere and the effects of global warming (aeronomy).

The satellite has been used as a true observatory in order to best respond to scientific challenges. The astronomy mission was successfully concluded in the spring of 2007 and since then the satellite has been used exclusively for studies of the Earth’s atmosphere. During the first six years of the Odin mission, when both astronomy and aeronomy observations were conducted, the available observing time was shared equally between the two disciplines.

Odin aeronomy

The consortium bringing data from space all the way to you

Since the launch of Odin in 2001 the Department of Earth and Space Sciences at Chalmers has been responsible for processing the Level2 product. In september 2015 ESA/SPPA decided to support the reprocessing of the Odin/SMR data set, which is now in progress.

The Odin mission has been supported by ESA since 2007. Odin is a part of ESA's Third party misson program within its Earthnet Programme.

ESA third party missions

The reprocessing campaign is a cooperation between Chalmers and Molflow.

The computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) funded by the Swedish Research Council through grant agreement no. 2018-05973.

Odin in space

Contact us, you will find us here

The mission scientist for ODIN/SMR is Prof. Donal Murtagh (Chalmers) and ESA's contact is Angelika Dehn

Prof. Donal Murtagh


Chalmers University of Technology
Department of Earth and Space Sciences
SE-412 96 Gothenburg

Angelika Dehn


Via Galileo Galilei Frascati (RM)
00044 Italy