Greifswald 2024 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 7: Sun and Heliosphere II
EP 7.3: Vortrag
Donnerstag, 29. Februar 2024, 14:30–14:45, ELP 6: HS 2
The alignment of STEREO-A and Earth: A unique opportunity to improve solar energetic proton forecasting capabilities — •B. Heber1, D. Banys2, J. Berdermann2, H. Dröge1, M. Hörlöck1, A. Kollhoff1, P. Kühl1, O. Malandraki3, J. Martens1,2, A. Posner4, and H. Sierks5 — 1Christian Albrechts Universität, Kiel, Germany — 2German Aerospace Center, Institute for Solar-Terrestrial Science — 3National Observatory of Athens, Greek — 4NASA, USA — 5Max-Planck Institute for Solar System Research, Germany
A major impact on human and robotic space exploration activities is the sudden and prompt occurrence of solar energetic ion events. The fact that near relativistic electrons (1 MeV electrons have 95% of the speed of light) travel faster than ions (30 MeV protons have 25% of the speed of light) and are always present in Solar Energetic Particle (SEP) events can be used to forecast the arrival of protons from SEP events with real-time measurements of near relativistic electrons. The Relativistic Electron Alert System for Exploration (REleASE) forecasting scheme uses this effect to predict the proton flux. In 2023 and 2024, STEREO is approaching the Earth from a behind position, soon passing Earth inside its orbit and thereafter moving ahead of Earth. STEREO thus offers several unique opportunities during this passage to test the accuracy and extent of the REleASE system as is, and to enhance REleASE beyond its current capabilities.
Keywords: Solar Energetic Particles; Measurements; Multi spacecraft study