Dear Colleagues, 

Following the COSPAR 2024 meeting held in Busan, a session on Off-the-Sun–Earth-Line (OSEL) missions will be organized again this year.

We cordially invite researchers from the solar, heliospheric, and space weather research communities to participate actively.
The abstract submission deadline is February 13, and submissions can be made via the following website:
https://www.cospar-assembly.org/admin/sessioninfo.php?session=1442

COSPAR-26-D2.1: Off-the-Sun-Earth-Line (OSEL) missions for a 3D view of the Sun and Heliosphere

Off-the-Sun-Earth-Line (OSEL) observations from vantage points such as Sun-Earth Lagrange points L4 and L5 as well as from a polar orbit can provide information in three-dimensions to understand the magnetic coupling of the solar interior to the heliosphere. These in combination with observations from Sun-Earth line (L1/ground-based) and in solar polar orbits can provide information missing at the solar poles and hence help us achieve a full 3-D view of the Sun. The unusual attribute of L4 covers the entire solar radiation hemisphere that is relevant for Lunar and Mars Exploration. Solar Orbiter is sampling the off-the ecliptic solar wind and observes the poles. These observations provide vital new information in understanding the 3-D heliosphere. We invite papers related to OSEL mission ideas, anticipated benefits to heliophysics investigations, and observational results from past/current missions such as STEREO, SOHO, SDO, Parker Solar Probe, and Solar Orbiter.

Main Scientific Organizer: Nat Gopalswamy (NASA/GSFC)

Deputy Organizer: Kyung-Suk Cho (KASI)

Scientific Organizing Committee: Robert F. Wimmer-Schweingruber (Kiel Univ., Germany), S. P. Rajaguru (Indian Inst. Astrophysics, India), Alexei Pevtsov (NSO, USA), Marc Pulupa (Univ. California, Berkeley), Roksoon Kim (KASI, S. Korea), Teresa Nieves-Chinchilla (NASA, USA)