Speaker
Description
Interpreting multipoint solar energetic particle (SEP) events requires reconciling spacecraft positions, magnetic connectivity, coronal mass ejection and flare properties, interplanetary shocks, and in situ plasma signatures across many missions, together with the interpretation of different models. That information already exists (CDAWeb, SSCWeb, OMNIWeb, DONKI, ISWA, Helioviewer, HEK, etc.) but lives behind a dozen independent interfaces, and researchers spend more time reconciling them in a 3D context and writing glue code than analyzing the event itself.
We present SEPsando, a web-based visualization sandbox developed at NASA GSFC's Space Physics Data Facility. A 2D/3D scene shows the current heliophysics fleet with a scrubbable timeline; particles overlay as probability regions from their origin; magnetic connectivity to the Sun is computed on the fly with several methods. The backend is built on Flask with SunPy, Astropy, and pfsspy; the frontend uses Three.js for the interactive 3D scene and Chart.js for time series and maps. SEPsando currently integrates directly with Helioviewer, CCMC's DONKI and ISWA, the 4D Orbit Viewer, and IRAP's Connectivity Tool. The explicit design goal is to link the existing ecosystem's different APIs in a user-friendly environment.
SEPsando is offered as a NASA-hosted service and as open-source software runnable locally. Ongoing work adds multipoint in-situ overlays, ENLIL and EUHFORIA representations, and deeper CDAWeb, OMNIWeb, and COHOWeb integrations.