2022-03-21T19:28:21.000Z http://sot.lmsal.com Ted Tarbell LMSAL http://lmsal.com 3251 Hanover Rd, O/ADBS, B/252, Palo Alto, CA, 94304 +1-650-424-2400 tarbell@lmsal.com Hinode SOTSP Arikawa Nishimoto DeRosa (RCO) 432 432 null HOP432 (with SolO/PHI) QS QS Quiet Sun 1 762 31 0 0 2022-03-22T10:09:00.000Z 2022-03-22T11:05:20.000Z 762 31 Solar Orbiter Polarimetric and Helioseismic Imager (SO/PHI) co-observations around perihelion passage Normal map, 19"x162", Q75/65, 2-side, 3 rpts Coordinated observations with the Solar Orbiter (SO) Polarimetric and Helioseismic Imager (PHI) High-Resolution Telescope (HRT), close to SO perihelion in the second remote sensing window (RSW2) of the first orbit of SO Nominal Mission Phase (NMP) that will take place in early March 2022. One of the main scientific opportunities offered by SO is stereoscopic observation in conjunction with Earth- or near-Earth observatories. The difference in viewing angle bears important consequences on the possibility of comparing and merging such observations, as the optical path from the two viewpoints can be very different. In order to assess the general feasibility of stereoscopic observations, a thorough comparison of the spectropolarimetric properties of Hinode/SOT-SP and SO/PHI-HRT is necessary.