Coordinated observation with Solar Orbiter

Solar Orbiter's coordinated observations with space-based and ground-based instruments are game changers in studying the connection between the Sun and the heliosphere. Our aim is to present the results and challenges of coordinated observations obtained with the Solar Orbiter and other instruments and highlight the advantages of using coordinated observations obtained with the Solar Orbiter and various telescopes.

We received two groups of unique coordinated observations:

1) We successfully coordinated observation campaigns between Solar Orbiter and the Daniel K. Inouye Solar Telescope (DKIST) in October 2022 and October 2023. These two telescopes provide a stereoscopic view with unprecedented high resolution. The scientific aim of these observations was related to active region studies from different vantage points (four proposals) and polar magnetic field regions (one proposal). The next observation session is planned for April 2025 and will focus on the upflow regions at the borders of active regions.

2) In October 2024, we successfully coordinated observations between the Solar Orbiter, the Interface Region Imaging Spectrograph (IRIS), and Hinode. The uniqueness of the obtained observations lies in the highest temporal cadence, 1 sec, of a solar atmosphere image ever achieved. These images were recorded by the Extreme Ultraviolet Imager (EUI) onboard Solar Orbiter. These coordinated observations from October 2024 show an active region with flaring activity.

The presented data are publicly available, and their interpretation is provided among others under the ISSI Team titled: "Active Region Evolution Under the Spotlight, with Unprecedented Coordinated High-Resolution Stereoscopic Observations and Numerical Simulations.” In conclusion, the coordinated observations from two different vantage points with imaging, spectroscopy and magnetic field instrument opened a new era in investigating structures in the solar atmosphere.