Speaker
Description
JEDI is a next-generation high cadence, multi-thermal EUV Imager selected by NASA to fly on the European Space Weather Mission Vigil in a halo orbit around the Lagrange Point L5. JEDI will improve our understanding of space weather and enhance space weather operations capability by providing vital observations of earth-directed space weather events from the solar disk out 6 R⊙. JEDI will also answer fundamental questions about the Ground State of Space Weather...the Solar Wind.
With 10x greater throughput than EUI/FSI in occulted mode >1.4 R⊙, JEDI makes high cadence observations of the "Middle Corona” (West et al. 2023) out to 6 R⊙ standard and routine. This important, yet little-observed, middle corona, is the critical region of CME acceleration, flare reconnection and solar wind formation. With its large FOV, JEDI directly complements other Vigil instruments, providing overlapping FOVs that connect the observations from the Photospheric Magnetic Field Imager (PMI) with those from CCOR (Compact Coronagraph).
The JEDI instrument is comprised of two simple, reliable, low-risk/high-heritage telescopes, the Space Weather Operational Coronal Imager (SWOC) and the Enhanced Wide-angle Observations of the Corona (EWOC). SWOC takes 4 min cadence images of the full solar disk and extended corona out to 3.2 R⊙ on the Earthward limb in three narrow passbands corresponding to temperatures ranging from the chromosphere to the flaring corona. EWOC takes images of the full solar disk and extended corona in two passbands sensitive to chromospheric and coronal plasma out to 6 R⊙. EWOC’s game-changing FOV is enabled by a moveable occulter, proven by Solar Orbiter Extreme Ultraviolet Imager (EUI/FSI), allowing interleaved, low-scattered light images of the extended corona and on-disk coronal structures.
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