Rules of the Road


Vlasiator is a significant investment, and its development has taken many years (since 2008). Vlasiator is funded by the European Research Council and the Academy of Finland.

Vlasiator requires considerable amount of human resources. The code is being developed by external funding. Runs are carried out with supercomputer resources that the PI team applies for from competitive sources (such as PRACE and CSC Grand Challenge). Each run needs to be babysat.

While FMI has licensed Vlasiator under GPL-2, these rules of the road have a similar philosophy as are generally in use for instruments. Vlasiator is the only one of its kind in the world, having no similar benchmark. Hence we need to make sure that all Vlasiator results have been verified by us.

The user is strongly advised to utilise Vlasiator as described below.

PI and the PI-team

The PI-team makes all decisions pertaining the Vlasiator master version. The PI-team owns the rights to all simulation results they have carried out. All data requests and other support questions should be addressed to the PI.


See the team

Co-I team

The Co-I team consists of reputable scientists chosen by the PI-team. The Co-I team can have access to analysed and verified data given by the PI-team. The Co-I team members have the right to show Vlasiator data to collaborators, but they do not have the right to give the data to anyone without the consent of the PI. In case a collaborator of a Co-I team member wants to access the data, they need to contact the PI. Access will in general be granted, but any publications or presentations need to follow the publication rules below, and the further distribution of the accessed data is not allowed without the consent of the PI-team. At times, we grant Guest-Investigatorships, who have the same rights as the Co-I team.


See the team


Other Vlasiator enthusiasts can have access to peer-reviewed and published data, or they may ask for verified data from the PI-team, which handles data requests on the best effort basis, taking into account that running the code and verifying the results take considerable human and computer resources. Any publications or presentations need to follow the publication rules below, and the further distribution of the accessed data is not allowed without the consent of the PI-team. The PI-team decides about the time and place in which the peer-reviewed data becomes public. The PI-team may make some data or movies public through the Vlasiator web pages. These data can be freely used in scientific work, presentations and publications, bearing in mind the publications rules of the road below.

Publications and presentations

All publications showing Vlasiator data shall cite the Vlasiator architectural paper
S. von Alfthan, D. Pokhotelov, Y. Kempf, S. Hoilijoki, I. Honkonen, A. Sandroos, M. Palmroth, Vlasiator: First global hybrid-Vlasov simulations of Earth's foreshock and magnetosheath, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 120, December 2014, Pages 24-35, doi:10.1016/j.jastp.2014.08.012

All publications or presentations showing Vlasiator data need to be inspected by someone from the Vlasiator PI-team. The PI and the relevant PI-and/or Co-I members shall be added as co-authors in the publication. The Vlasiator PI-team may publish the Vlasiator data shown in the publication through the Vlasiator web page.

Acknowledgement for publications and presentations

Vlasiator is developed by the European Research Council Starting grant 200141-QuESpace, and Consolidator grant GA682068-PRESTISSIMO received by the Vlasiator PI. Vlasiator has also received funding from the Academy of Finland. See http://vlasiator.fmi.fi.


All presentations showing Vlasiator data shall include a Vlasiator slide given by the PI-team. The presentation shall also include the Vlasiator official acknowledgement.