Greifswald 2024 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 7: Sun and Heliosphere II
EP 7.4: Talk
Thursday, February 29, 2024, 14:45–15:00, ELP 6: HS 2
Solar Energetic Proton forecasting with REleASE during STEREO-A's flyby of Earth — •Henrik Dröge1, Bernd Heber1, Alexander Kollhoff1, Patrick Kühl1, Olga Malandraki3, and Arik Posner2 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany — 2NASA/HQ, Washington, DC 20546, USA — 3National Observatory of Athens, Athens, Greece
Solar Energetic Particle (SEP) events can pose a significant radiation hazard for human and robotic space exploration acivities. Therefore SEP forecasting systems are needed to support operations. The REleASE system (A. Posner, 2007) utilizes the fact that near relativistic electrons (1 MeV electrons have 94% of the speed of light) travel faster than ions (30 MeV protons have 25% of the speed of light) and are always present in hazardous SEP events. Their early arrival can be used to forecast the expected proton flux. Originally REleASE uses realtime data from SOHO/EPHIN near Earth. Since the instrument is aging we recently adapted the method to STEREO-A/HET and used the period from June to November, 2023 when STEREO-A passed the Earth to compare the REleASE forecasts from the different instruments.
Keywords: Solar Energetic Particles; Forecast