Thermosphere data

Free thermosphere density and wind data download from the CHAMP, GRACE, GRACE-FO, GOCE, and Swarm missions.

Update on November 27, 2023: Uploaded POD-derived Swarm density data (version 01) covering October 2023.
Update on March 15, 2023: We distribute the density and crosswind data under Creative Commons Attribution 4.0 International (CC BY 4.0) license. Satellite geometry, aerodynamic, and radiation pressure models are shared under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license.

We advise accessing our anonymous FTP server (ftp://thermosphere.tudelft.nl) using an FTP client.

Download data TOLEOS project

Data and models

All freely available on our FTP server. You might need a FTP client to open the link (user anonymous, any password is accepted).

Geometry models

High-fidelity geometry models for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Aerodynamic models

Aerodynamic models generated by the SPARTA direct simulation Monte Carlo simulator are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Radiation pressure models

Radiation pressure models based on ray tracing are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Density and wind data

Density and wind data for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY 4.0.

References

If you use the data on this webpage, please cite our publications.

Accelerometer-derived density data

C. Siemes, C. Borries, S. Bruinsma, I. Fernandez-Gomez, N. Hładczuk, J. van den IJssel, T. Kodikara, K. Vielberg, P. Visser (2023) New Thermosphere Neutral Mass Density and Crosswind Datasets from CHAMP, GRACE, and GRACE-FO. Journal of Space Weather and Space Climate. https://doi.org/10.1051/swsc/2023014

G. March, J. van den IJssel, C. Siemes, P. Visser, E. Doornbos, M. Pilinski (2021) Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere density. Journal of Space Weather and Space Climate, 11: 54. https://doi.org/10.1051/swsc/2021035

C. Siemes, J. de Teixeira da Encarnação, E. N. Doornbos, J. van den IJssel, J. Kraus, R. Pereštý, L. Grunwaldt, G. Apelbaum, J. Flury and P. E. Holmdahl Olsen (2016) Swarm accelerometer data processing from raw accelerations to thermospheric neutral densities. Earth, Planets and Space, 68: 92. https://doi.org/10.1186/s40623-016-0474-5

E. N. Doornbos (2012) Thermosphere density and wind determination from satellite dynamics. Dissertation, Springer Nature, Switzerland. ISBN 978-3-642-25129-0 (free PDF version)

Satellite geometry and aerodynamic models

G. March, E. N. Doornbos and P. N. M. A. Visser (2019) High-fidelity geometry models for improving the consistency of CHAMP, GRACE, GOCE and Swarm thermospheric density data sets. Advances in Space Research 63: 213–238. https://doi.org/10.1016/j.asr.2018.07.009

G. March, E. N. Doornbos and P. N. M. A. Visser (2019) CHAMP and GOCE thermospheric wind characterization with improved gas-surface interactions modelling. Advances in Space Research 64: 1225–1242. https://doi.org/10.1016/j.asr.2019.06.023

GNSS-derived density data

J. van den IJssel, E. Doornbos, E. Iorfida, G. March, C. Siemes, O. Montenbruck (2020) Thermosphere densities derived from Swarm GPS observations. Advances in Space Research. https://doi.org/10.1016/j.asr.2020.01.004

P. Visser and J. van den IJssel J (2016) Orbit determination and estimation of non-gravitational accelerations for the GOCE reentry phase. Advances in Space Research 58: 1840–1853. https://doi.org/10.1016/j.asr.2016.07.013

The original data was obtained from the following sources

CHAMP data: GFZ's Information System and Data Center
GOCE and Swarm data: ESA's Earth Online webpage
GRACE and GRACE-FO data: NASA's Physical Oceanography Distributed Active Archive Center (PO.DAAC)

Thermosphere data

Data and models

All freely available on our FTP server. You might need a FTP client to open the link (user anonymous, any password is accepted).

Geometry models

High-fidelity geometry models for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Aerodynamic models

Aerodynamic models generated by the SPARTA direct simulation Monte Carlo simulator are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Radiation pressure models

Radiation pressure models based on ray tracing are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Density and wind data

Density and wind data for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY 4.0.

References

Team members

Christian Siemes

Jose van den IJssel

Pieter Visser

Sabin Anton

Natalia Hładczuk

Former team members

Eelco Doornbos

Tim Visser

Günther March

Elisabetta Iorfida

Funding sources

The generation of our models and data was supported by

ESA – European Space Agency

NWO – Dutch Research Council

Swarm DISC - Data, Innovation and Science Cluster

Address

Contact

Links

Thermosphere data

Data and models

All freely available on our FTP server. You might need a FTP client to open the link (user anonymous, any password is accepted).

Geometry modelsHigh-fidelity geometry models for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Aerodynamic modelsAerodynamic models generated by the SPARTA direct simulation Monte Carlo simulator are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Radiation pressure modelsRadiation pressure models based on ray tracing are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Density and wind dataDensity and wind data for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY 4.0.

References

Team members

Former team members

Eelco Doornbos

Tim Visser

Günther March

Elisabetta Iorfida

Funding sources

The generation of our models and data was supported by

Address

Contact

Links

Geometry models

High-fidelity geometry models for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Aerodynamic models

Aerodynamic models generated by the SPARTA direct simulation Monte Carlo simulator are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Radiation pressure models

Radiation pressure models based on ray tracing are freely available under Creative Commons licence CC BY-NC-SA 4.0.

Density and wind data

Density and wind data for the CHAMP, GRACE, GOCE and Swarm satellites are freely available under Creative Commons licence CC BY 4.0.