The EUI data policy

The EUI consortium is committed to a maximally open data policy meaning that all data products, low latency data products, the calibration software and science user documentation will be made available as soon as possible and as broadly as possible. This implies specifically that the EUI consortium will not exercise the right foreseen in the Solar Orbiter Management Plan (Solar Orbiter 2012) to retain the data private during 3 months after the receipt of the original telemetry for the purpose of calibration and verification. Instead, the EUI data products will be distributed as soon as is technically possible with the best known calibration at the time of production.

The full EUI data archive will be reprocessed on a regular basis to apply the continuously improving instrument understanding and calibration optimisation. Each such reprocessing will be distributed as a new release of the data. Typically only Level 2 data will be upgraded in a new release. Level 0 data will never change by definition. Level 1 data will only be upgraded if the metadata content is changing. Level 3 data will only upgrade if the changes imply a visually perceptible change. Previous ver- sions of the data, corresponding to old releases, will continue to be available for reproducibility of past research.

As the EUI data is immediately released with the best available calibration, some artifacts might remain in the data until they are resolved in a later released.  Scientists outside the EUI consortium are therefore encouraged to contact the EUI team for specific advice and support when using EUI data. Co-authorship will be requested depending on the level of involvement of EUI team members.

All EUI science data will be available from the EUI Data Centre and from the Solar Orbiter Archive (SOAR). EUI science data will be further propagated through Virtual Observa- tories (Rouillard et al. 2019) and online visualisation platforms such as JHelioviewer (Müller et al. 2017).