2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/STEREO-B/SECCHI/EUVI/304/PT5M NASA STEREO-B Extreme UltraViolet Imager 30.4 nm (He II) https://doi.org/10.48322/dsa9-d761 2026-03-19T21:11:20Z 2026-03-03T00:08:46Z Only known prior ReleaseDate of the metadata 2026-03-16T00:08:46 Updated ResourceName, Contact, and TimeSpan; Added MetadataRightsList and RightsList(s) 2026-03-17T00:08:46 Added HelioViewerID to Extension 2026-03-19T21:11:20Z Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Added DOI. tlk The Extreme Ultraviolet Imager (EUVI) is part of the Sun Earth Connection Coronal and Heliospheric Investigations (SECCHI) instrument suite on the NASA STEREO mission. The SECCHI on the two STEREO spacecraft are identical suites of remote sensing instruments designed to observe coronal mass ejections (CMEs) at the Sun and in transit outwards to 1 AU. EUVI measured emission lines at 30.4 nm (He II), 17.1 nm (Fe IX), 19.5 nm (Fe XII), and 28.4 nm (Fe XV). The EUVI 2048 x 2048 pixel detectors have a field of view out to 1.7 solar radii, and observe in four spectral channels that span the 0.1 to 20 MK temperature range. In addition to its view from two vantage points, the EUVI will provide a substantial improvement in image resolution and image cadence over its predecessor SOHO-EIT, while complying with the more restricted mass, power, and volume allocations on the STEREO mission. The SECCHI Consortium: Naval Research Laboratory (USA); Lockheed Martin Solar and Astrophysics Laboratory (USA); NASA Goddard Space Flight Center (USA); Johns Hopkins University Applied Physics Laboratory (USA); Rutherford Appleton Laboratory (UK); University of Birmingham (UK); Max-Planck-Institut für Sonnensystemforschung (Germany); Centre Spatiale de Liege (Belgium); Institut d'Optique Théorique et Appliqueé (France); Institut d'Astrophysique Spatiale (France) 2006-12-06T00:00:00 NASA Goddard Space Flight Center spase://SMWG/Person/James.R.Lemen InstrumentScientist spase://SMWG/Person/Brian.Wood PrincipalInvestigator spase://SMWG/Person/Russell.A.Howard FormerPI spase://SMWG/Person/Angelos.Vourlidas ProgramScientist spase://SMWG/Person/William.T.Thompson GeneralContact The EUVI Instrument paper by Wuesler et al. 2004 https://secchi.lmsal.com/EUVI/DOCUMENTS/5171_15.pdf The EUVI paper. The SECCHI instrument paper by Howard et al. 2008 https://link.springer.com/article/10.1007/s11214-008-9341-4 spase://SMWG/Repository/NASA/GSFC/STEREO_SC Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products https://stereo-ssc.nascom.nasa.gov/data/ins_data/secchi/L0_YMD/b/img/euvi/ SECCHI/EUVI Level 0 FITS data archive. Folder name date format in YYYYMMDD. FITS Raw ImageIntensity 2006-10-01T00:00:00 2014-09-28T00:00:00 Communications with STEREO-B were lost on Oct. 1, 2014, due to multiple hardware anomalies affecting control of the spacecraft orientation. ExtremeUltraviolet Sun Sun.Chromosphere Sun.TransitionRegion FITS Data Array Data from EUVI observations in the 30.4 nm (He II) wavelength. PT5M Photon Intensity 27