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Extreme Ultraviolet Imager PMI : Photospheric Magn 11.23 : The Remote-Sensing Package for ESA’s Lagrange Mission (HELCATS) J. Davies1*, S. Kraft2 & the Lagrange RS Consortium (1) STFC-Rutherford Appleton Laboratory, UK; (2) ESA Space Situational Awareness Programme, ESOC, Germany *Consortium Lead ([email protected]) The space weather element of ESA’s SSA programme was established to address the increasing risks of solar effects on human technological systems and health. Within its current Period 3, the SSA programme has been extended to include the additional Lagrange (LGR) element, targeted towards the development of an operational space weather mission to the L5 Lagrange point. Under the auspices of LGR, a number of Phase A/B1 studies are well underway; these studies cover the remote-sensing payload, the in-situ payload, and the overall system. Here, we review the status of the Phase A/B1 study of the remote-sensing instrument package, which includes a Photospheric Magnetic Field Imager (PMI), EUV Imager (EUVI), Coronagraph (COR) and Heliospheric Imager (HI). We will present the instrument designs at Preliminary Requirements Review (PRR), including the instrument control and processing philosophy (in terms of a shared Instrument Processing and Control Unit, IPCU, albeit in conjunction with a dedicated PMI processor); we will also present the progress towards defining the baseline architecture for the End-to-End simulator for the whole instrument package. Acknowledgements : This work is being funded by ESA under contract number 4000122930/18/D/MRP Building on Extensive European Heritage in PMI : Photospheric Magnetic Field Imager EUVI : Extreme Ultraviolet Imager Scientific Instrumentation. Monitoring (in visible light) magnetic activity on the Sun; Monitoring evolving activity of the chromosphere/low • A European consortium with extensive scientific and provides input to the background solar wind to model CME corona including filaments/prominences and coronal holes. technical expertise, and heritage, in solar and arrival at Earth. L5 view enables such monitoring of that L5 view enables such monitoring of that part of the solar heliospheric instrumentation… part of the solar disk yet to rotate towards Earth. disk yet to rotate towards Earth. • …on ESA, joint ESA/NASA and NASA missions such as • PMI lead : MPS, PMI partner : OHB • EUVI leads : CSL/ROB, EUVI partner : PMOD SOHO, Proba-2, STEREO, SDO and Solar Orbiter. • Heritage : PHI on Solar Orbiter • Heritage : SWAP on Proba-2, ESIO study • A suite of instruments that, combined, will image the • Concept : optically-modified version of HRT of PHI on • Concept : combines SWAP optical layout/ESIO thermo- photosphere, chromosphere/inner corona, outer corona Solar Orbiter mechanical concept and heliosphere to 1 AU. • Products : vector magnetograms (B, γ, φ), line-of-sight • Products : three bands centred on Fe XII 193Å, He II 304Å, velocities (vLOS) and continuum mapping (Ic) Fe VIII/XXI 131Å Consortium members • FoV : full disk + alignment margin (depends on pointing) • FoV : 42.6 x 61.3 arcmin (extended towards Earth) • RAL: STFC-RAL Space, UK (J. Davies/R. Torabi/M. Caldwell) : Consortium • Spatial resolution : 2.2 arcsec • Spatial resolution : 3.2 arcsec Prime • Cadence : 30 min • Cadence : <5 min (wavelength dependent) • ADS: Airbus Defence and Space, Germany (B. Oexl) • CSL: Centre Spatial de Liège, Belgium (C. Kintziger) • DMU: Deimos Space UK Ltd, UK (R. Wright) Ic • DMR: Deimos Space S.R.L., Romania (I. Grozea) • PMOD: Physikalisch-Meteorologisches Observatorium/World Radiation Center, Switzerland (M. Gyo) νLOS • MPS:Max-Planck-Inst. für Sonnensystemforschung, Germany (J. Staub) • OHB:OHB System AG, Germany (E. Gubbini) B • RDA: Research & Development in Aerospace, Switzerland (J. Barbosa) • ROB: Royal Observatory of Belgium, Belgium (M. West) γ • UGOE:Georg-August-Universität Göttingen Stiftung Öffentlichen Rechts, Germany (V. Bothmer) φ • UKMO: Met Office, UK (M. Gibbs) - requirements oversight IPCU : Instrument Processing and Control Unit COR : Coronagraph HI : Heliospheric Imager To provide ● control, Earliest definitive confirmation of CME launch, and tracking Monitoring (in visible light) of vast under-sampled region commanding and telemetry ● of early CME trajectory (in visible light); basis of CME between outer corona and 1 AU mitigates deficiencies in power interface from s/c and parameterization for most CME arrival predictions. L5 view modelling CME arrival based on near-Sun data. L5 view of distribution to instruments ● improves CME parameterization, particularly combined Earth-directed CMEs enables accurate speed assessment. digital processing ● mechanism with view from L1. control ● thermal control. • HI lead : RAL, HI partner : UGOE • COR lead : RAL, COR partner : UGOE • Heritage : HI on STEREO • IPU lead : ADS • Heritage : HI on STEREO, SCOPE study • Concept : optically-modified STEREO HI instrument • Heritage : MetOp 2nd Gen. • Concept : SCOPE instrument • FoV (ecliptic extent) : 4 – 70° elongation • Concept: single IPU • FoV (radial) : 2.5 – 25 Rsun for package (additional • HI-1 : 30° FoV, boresite 19° processing unit for PMI) • FoV (azimuthal) : 360° • HI-2 : 50° FoV, boresite 45° • Spatial resolution : <2 arcmin • Spatial resolution : 3.5 arcmin (HI-1), 6 arcmin (HI-2) G&F: Ground and Flight Operations • Cadence : 5 min • Cadence : 30 min (both cameras) Support definition of operations concept/flight operations ground segment ● requirements/high-level architecture/prototype architecture for E2E Mission Performance Simulator ● interaction with instrument definition/design tasks. • G&F lead : DMU, G&F partners : DMR, RDA • Concept : Standard approach built on Space Science E2E Mission Performance Simulator Reference • Status : Standard tailored to required high-level architecture and modules defined. Working on the specifics for each instrument..
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