Towards Unified Error Reporting (TUNER)
Towards Unified Error Reporting (TUNER)
Editor(s): T. von Clarmann, D. Degenstein, N. Livesey, and H. Worden Overview paper
Towards UNified Error Reporting (TUNER) is an emerging SPARC activity and an ISSI International Team. This project aims to provide consistent and inter-comparable error estimates for atmospheric temperature and composition measurements from space. Along with this, a consistent and inter-comparable characterization of spatial resolution and content of a priori information of the remotely sensed data shall be provided. This is important, because quantitative work with remotely sensed data – data assimilation, data merging, time series analysis, testing of hypotheses, etc. – depends largely on the adequate characterization of the data. Currently, multiple retrieval methods are used by the different instrument groups, and along with this various approaches to error estimation are applied. Resulting errors are not always inter-comparable. Some kinds of uncertainties are sometimes not reported at all. The different altitude resolutions and the different content of prior information in the data products are a particular problem. Within TUNER, data characterization methods currently in use are identified, their completeness and inter-comparability are assessed, recommendations for how unified data characterization should be performed and how data uncertainties should be reported are developed, and unified error estimates for some selected data products are provided. Beyond this, data users are instructed how to best utilize these metadata. This special issue is meant to include papers covering one of the following topics:
  • methodical work related to the uncertainty assessment of satellite data on atmospheric temperature and composition;
  • the error budget of satellite-borne atmospheric sounders;
  • the use of results of validation studies to judge the adequacy of uncertainty estimates;
  • recommendations for unified error estimates;
  • tutorial articles on the correct use of error estimates and other diagnostic data and related topics.
    • This special issue is open to contributions from outside the related SPARC and ISSI TUNER teams, provided that the content fits within the scope of TUNER. Further details are available at

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17 Aug 2020
Overview: Estimating and reporting uncertainties in remotely sensed atmospheric composition and temperature
Thomas von Clarmann, Douglas A. Degenstein, Nathaniel J. Livesey, Stefan Bender, Amy Braverman, André Butz, Steven Compernolle, Robert Damadeo, Seth Dueck, Patrick Eriksson, Bernd Funke, Margaret C. Johnson, Yasuko Kasai, Arno Keppens, Anne Kleinert, Natalya A. Kramarova, Alexandra Laeng, Bavo Langerock, Vivienne H. Payne, Alexei Rozanov, Tomohiro O. Sato, Matthias Schneider, Patrick Sheese, Viktoria Sofieva, Gabriele P. Stiller, Christian von Savigny, and Daniel Zawada
Atmos. Meas. Tech., 13, 4393–4436,,, 2020
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15 Aug 2019
Harmonization and comparison of vertically resolved atmospheric state observations: methods, effects, and uncertainty budget
Arno Keppens, Steven Compernolle, Tijl Verhoelst, Daan Hubert, and Jean-Christopher Lambert
Atmos. Meas. Tech., 12, 4379–4391,,, 2019
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26 Sep 2019
The application of mean averaging kernels to mean trace gas distributions
Thomas von Clarmann and Norbert Glatthor
Atmos. Meas. Tech., 12, 5155–5160,,, 2019
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17 Oct 2018
Level 1b error budget for MIPAS on ENVISAT
Anne Kleinert, Manfred Birk, Gaétan Perron, and Georg Wagner
Atmos. Meas. Tech., 11, 5657–5672,,, 2018
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04 Sep 2018
Evaluation of MUSICA IASI tropospheric water vapour profiles using theoretical error assessments and comparisons to GRUAN Vaisala RS92 measurements
Christian Borger, Matthias Schneider, Benjamin Ertl, Frank Hase, Omaira E. García, Michael Sommer, Michael Höpfner, Stephen A. Tjemkes, and Xavier Calbet
Atmos. Meas. Tech., 11, 4981–5006,,, 2018
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25 Apr 2023
Michelson Interferometer for Passive Atmospheric Sounding Institute of Meteorology and Climate Research/Instituto de Astrofísica de Andalucía version 8 retrieval of nitric oxide and lower-thermospheric temperature
Bernd Funke, Maya García-Comas, Norbert Glatthor, Udo Grabowski, Sylvia Kellmann, Michael Kiefer, Andrea Linden, Manuel López-Puertas, Gabriele P. Stiller, and Thomas von Clarmann
Atmos. Meas. Tech., 16, 2167–2196,,, 2023
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17 Mar 2023
Version 8 IMK–IAA MIPAS ozone profiles: nominal observation mode
Michael Kiefer, Thomas von Clarmann, Bernd Funke, Maya García-Comas, Norbert Glatthor, Udo Grabowski, Michael Höpfner, Sylvia Kellmann, Alexandra Laeng, Andrea Linden, Manuel López-Puertas, and Gabriele P. Stiller
Atmos. Meas. Tech., 16, 1443–1460,,, 2023
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20 Oct 2022
Assessment of the error budget for stratospheric ozone profiles retrieved from OMPS limb scatter measurements
Carlo Arosio, Alexei Rozanov, Victor Gorshelev, Alexandra Laeng, and John P. Burrows
Atmos. Meas. Tech., 15, 5949–5967,,, 2022
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06 Dec 2022
TUNER-compliant error estimation for MIPAS: methodology
Thomas von Clarmann, Norbert Glatthor, Udo Grabowski, Bernd Funke, Michael Kiefer, Anne Kleinert, Gabriele P. Stiller, Andrea Linden, and Sylvia Kellmann
Atmos. Meas. Tech., 15, 6991–7018,,, 2022
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20 Apr 2022
Satellite data validation: a parametrization of the natural variability of atmospheric mixing ratios
Alexandra Laeng, Thomas von Clarmann, Quentin Errera, Udo Grabowski, and Shawn Honomichl
Atmos. Meas. Tech., 15, 2407–2416,,, 2022
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07 Mar 2022
Truth and uncertainty. A critical discussion of the error concept versus the uncertainty concept
Thomas von Clarmann, Steven Compernolle, and Frank Hase
Atmos. Meas. Tech., 15, 1145–1157,,, 2022
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07 Jun 2021
IMK/IAA MIPAS temperature retrieval version 8: nominal measurements
Michael Kiefer, Thomas von Clarmann, Bernd Funke, Maya García-Comas, Norbert Glatthor, Udo Grabowski, Sylvia Kellmann, Anne Kleinert, Alexandra Laeng, Andrea Linden, Manuel López-Puertas, Daniel R. Marsh, and Gabriele P. Stiller
Atmos. Meas. Tech., 14, 4111–4138,,, 2021
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22 Apr 2021
A method for random uncertainties validation and probing the natural variability with application to TROPOMI on board Sentinel-5P total ozone measurements
Viktoria F. Sofieva, Hei Shing Lee, Johanna Tamminen, Christophe Lerot, Fabian Romahn, and Diego G. Loyola
Atmos. Meas. Tech., 14, 2993–3002,,, 2021
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24 Feb 2021
Model estimations of geophysical variability between satellite measurements of ozone profiles
Patrick E. Sheese, Kaley A. Walker, Chris D. Boone, Doug A. Degenstein, Felicia Kolonjari, David Plummer, Douglas E. Kinnison, Patrick Jöckel, and Thomas von Clarmann
Atmos. Meas. Tech., 14, 1425–1438,,, 2021
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18 Jul 2018
The MUSICA IASI CH4 and N2O products and their comparison to HIPPO, GAW and NDACC FTIR references
Omaira E. García, Matthias Schneider, Benjamin Ertl, Eliezer Sepúlveda, Christian Borger, Christopher Diekmann, Andreas Wiegele, Frank Hase, Sabine Barthlott, Thomas Blumenstock, Uwe Raffalski, Angel Gómez-Peláez, Martin Steinbacher, Ludwig Ries, and Angel M. de Frutos
Atmos. Meas. Tech., 11, 4171–4215,,, 2018
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