Whitepaper #042 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications. Additional topics: ground-based missions/projects; other space weather; space-based missions/projects.
This paper demonstrates the importance of having near-real-time low corona CME observations, 0.05 to 0.4 nm solar flare emission, low frequency radio emissions, relativistic electron intensities from L4, and high-quality energetic proton measurements from the SEL line and L4. The availability of these data in near-real-time can increase SEP warning times and improve SEP predictions.