The Science Case for the $4{\pi}$ Perspective: A Polar/Global View for Studying the Evolution & Propagation of the Solar Wind and Solar Transients

TL;DR

This paper advocates for a comprehensive 4π perspective of the solar surface and atmosphere, emphasizing the importance of polar and global imaging to understand solar wind and transient phenomena evolution and propagation.

Contribution

It proposes a strategic plan to achieve full 4π coverage of the Sun by 2050, integrating in-situ and imaging data from multiple vantage points, especially polar perspectives.

Findings

Polar vantage provides unique coverage benefits.

Full 4π coverage enhances understanding of CME/CIR propagation.

Spatially resolved, multi-vantage observations are crucial for progress.

Abstract

To make progress on the open questions on CME/CIR propagation, their interactions and the role and nature of the ambient solar wind, we need spatially resolved coverage of the inner heliosphere -- both in-situ and (critically) imaging -- at temporal scales matching the evolutionary timescales of these phenomena (tens of minutes to hours), and from multiple vantage points. The polar vantage is uniquely beneficial because of the wide coverage and unique perspective it provides. The ultimate goal is to achieve full $4\pi$ coverage of the solar surface and atmosphere by 2050.