This post summarizes some configurations involving Solar Orbiter and other s/c, having potential interest for multipoint science and/or cross-calibration.
April 28 - May 1: Radial alignment SolO-Earth. PSP is at nearly same heliocentric distance as SolO. STEREO-A and STEREO-B (not working) are in quadrature with Earth and SolO
May 25: Parker spiral alignment SolO-Earth. PSP is at nearly at quadrature with SolO. STEREO-A and STEREO-B (not working) are near quadrature with Earth and SolO
June 30: Parker spiral alignment SolO-STEREO-B and PSP-Venus-Earth. (but contact with STEREO-B remains currently lost). Shortly after, on July 9-12, PSP is close to Venus. Both STEREO near quadrature with Earth
August 12: Parker spiral alignment SolO-Mercury and PSP-Earth. (but contact with STEREO-B remains currently lost). Shortly after, on July 9-12, PSP is close to Venus. Both STEREO near quadrature with Earth. STEREO-B near quadrature with SolO.
September 23: Parker spiral alignment PSP-Earth, PSP and SolO near quadrature.
September 27-28: Radial (and later Parker spiral) alignment of PSP and SolO, with PSP near perihelion. PSP moves very fast and alignments are short.
