Two-spacecraft detection of short-period decayless kink oscillations of solar coronal loops

Decayless kink oscillations of an ensemble loops are captured simultaneously by the High Resolution Imager (HRI) Extreme Ultraviolet (EUI) and Atmospheric Imaging Assembly (AIA) from 22:58 UT on 5 November to 00:27 6 2021. Oscillations analysed processing image sequences taken two instruments with a motion magnification technique. The around 51 Mm in length, oscillate short periods 1-3 min (1.6 average) displacement amplitudes 27-83 km. signals recorded AIA delayed 66 s as compared HRI, which coincides light travel time difference Sun each instrument. After correction this difference, cross-correlation coefficient between data varies 0.82 0.97, indicating that they well consistent. This work confirms HRI sees same AIA, is necessary first step before proceeding detection shorter scales EUI. In addition, our results indicate robustness de-jittering procedure study HRI.