Dataset of the CO/CO2 ratio retrieved from solar occultation by TGO/NOMAD, presented in Yoshida et al., 2022

The CO/CO2 ratio in MY 35 retrieved from solar occultation observations by Nadir and Occultation for Mars Discovery (NOMAD) onboard the ExoMars Trace Gas Orbiter (TGO), presented in Yoshida et al., 2022.

The dataset contains the CO/CO2 ratio at tangential altitude retrieved from the Solar Occultation channel of NOMAD.

The dataset is separated into one text file per solar occultation. Version 2 corrects an error in the latitude/longitude/Ls/local time values in the header of each file; plus some files in version 1 did not contain any data, so these have been removed from version 2.

Data and Resources

Tags

Cite this as (APA format)

Yoshida, N., Vandaele, A. C., & Thomas, I. (2022). Dataset of the CO/CO2 ratio retrieved from solar occultation by TGO/NOMAD, presented in Yoshida et al., 2022 (Version 1) [Data set]. Royal Belgian Institute for Space Aeronomy. https://doi.org/10.18758/71021076
Retrieved: 15:55 13 Jan 2026 (UTC)
Users of this DOI are kindly encouraged to contact the author(s) for help and cooperation towards further successful utilisation.

Author(s)
Principal

Yoshida, Naoorcid, Tohoku University
Other(s)

Vandaele, Ann Carineorcid, Royal Belgian Institute for Space Aeronomy; Thomas, Ianorcid, Royal Belgian Institute for Space Aeronomy;
Contact data-contact of Royal Belgian Institute for Space Aeronomy

Technical info
Is referenced by

https://doi.org/10.1029/2022GL098485
Is derived from (sources,...)

Thomas, I., Willame, Y., & Trompet, L. (2025). Calibrated PDS4 Data from NOMAD on the ExoMars Trace Gas Orbiter (Version 1) [Data set]. Royal Belgian Institute for Space Aeronomy. https://doi.org/10.18758/9F0PCA5R

Temporal features
Starting

April 1, 2019
Ending

February 1, 2021

Additional info
Repository homepage

https://data.aeronomie.be/dataset/
Last Updated

September 2, 2025
Created

April 25, 2022

Spatial features

No spatial information