000005219 001__ 5219
000005219 005__ 20220131121253.0
000005219 0247_ $$2DOI$$a10.1051/0004-6361/202140457
000005219 037__ $$aSCART-2021-0040
000005219 100__ $$aPodladchikova, O.
000005219 245__ $$aStereoscopic Measurements of Coronal Doppler Velocities
000005219 260__ $$c2021
000005219 520__ $$aContext. The Solar Orbiter mission, with an orbit outside the Sun-Earth line and leaving the ecliptic plane, opens up opportunities for the combined analysis of measurements obtained by solar imagers and spectrometers. For the first time different space spectrometers will be located at wide angles to each other, allowing three-dimensional (3D) spectroscopy of the solar atmosphere. Aims. The aim of this work is to prepare a methodology to facilitate the reconstruction of 3D vector velocities from two stereoscopic line of sight (LOS) Doppler velocity measurements using the Spectral Imaging of the Coronal Environment (SPICE) on board the Solar Orbiter and the near-Earth spectrometers, while widely separated in space. Methods. We developed the methodology using the libraries designed earlier for the STEREO mission, but applied to spectroscopic data from the Hinode mission and the Solar Dynamics Observatory. We used well-known methods of static and dynamic solar rotation stereoscopy and the methods of extreme ultraviolet (EUV) stereoscopic triangulation for optically thin coronal EUV plasma emissions. We developed new algorithms using analytical geometry in space to determine the 3D velocity in coronal loops. Results. We demonstrate our approach with the reconstruction of 3D velocity vectors in plasma flows along ‘open’ and ‘closed’ magnetic loops. This technique will be applied to an actual situation of two spacecraft at different separations with spectrometers on board during the Solar Orbiter nominal phase: SPICE versus the Interface Region Imaging Spectrograph (IRIS) and Hinode imaging spectrometer. We summarise how these observations can be coordinated.
000005219 594__ $$aNO
000005219 6531_ $$atechniques: imaging spectroscopy
000005219 6531_ $$aSun: corona
000005219 6531_ $$aSun: UV radiation
000005219 6531_ $$aSun: heliosphere
000005219 6531_ $$aSolar Orbiter
000005219 6531_ $$aEUI
000005219 6531_ $$ainstrumentation: high angular resolution
000005219 6531_ $$ainstrumentation: spectrographs
000005219 700__ $$aHarra, L.
000005219 700__ $$aBarczynski, K.
000005219 700__ $$aMandrini, C.
000005219 700__ $$aBerghmans, D.
000005219 700__ $$aDolla, L.
000005219 700__ $$aParenti, S.
000005219 700__ $$aRodriguez, L.
000005219 773__ $$nA57$$pAA$$vVolume 655, November 2021$$y2021
000005219 8560_ $$fluciano.rodriguez@observatoire.be
000005219 85642 $$ahttps://www.aanda.org/articles/aa/abs/2021/11/aa40457-21/aa40457-21.html?utm_source=email_alert_aa&utm_medium=email&utm_campaign=2021-11-19
000005219 905__ $$apublished in
000005219 980__ $$aREFERD