1. Enabling Technology Development: High cadence imaging spectrograph development Low mass/power instrumentation Advanced communication/DSN for future deployment to Sentinel or remote locations Science Objectives: Determine the most relevant observational signatures of flare, CME, and Solar Particle Event (SPE) eruption Identify precursor signatures which can be used to forecast flare, CME, and SPE eruption Identify what is needed to improve our ability to nowcast and forecast space weather & SPEs Identify the physical mechanisms of mass flow and energy release in the solar atmosphere Determine the interaction and connectivity of structures throughout the solar atmosphere Space Weather Imaging Sentinel (SWIS) Mission Description: (Near/Intermediate Term) Example Mission Design -1 spacecraft, 5 Hi-TRL instruments (4 remote, 1 in-situ) -L1 or Geo or 98°, 600 km sun-synch orbit -continuous solar viewing -3-axis stabilized, 30 arc-sec pointing capability -Payload: 40 kg, 53 W, 2.2 Mbps Measurement Strategy: UV/EUV Imaging Spectrograph for flow velocities & energy buildup & release signatures, both on the disk and off-limb (out to 3 Rs)Filter Magnetograph for surface magnetic field measurements Chromospheric/Coronal EUV Imagers for morphology and dynamics Energetic Particles (SEP) measurements for event characterization Coronagraph for detection & characterization of Halo CMEs Associated RFAs: RFA F1: “Understand magnetic reconnection as revealed in solar flares, CMEs,…” RFA F2: “Understand the plasma processes that accelerate and transport particles.” RFA J2: “Develop the capability to predict the origin and onset of solar activity and disturbances associated with potentially hazardous space weather events.”

2. SWIS Instrument Summary InstrumentMass (kg)Power (w)Data Rate (Mbps) UV/EUV Spectrograph20351 Filter Magnetograph660.5 Chromospheric/Coronal EUV Imager(s) 5.630.5 Coronagraph5.230.2 Energetic Particles Detector360.01 TOTAL39.8532.21 Instrument payload complement/characteristics provided by cognizant science advocates within Heliophysics community.

3. SWIS Conceptual Block Diagram POWER PAYLOAD ATTITUDE CONTROL TELECOMMUNICATIONS BATTERY OMNIS HGA Chromospheric Coronal EUV Imager(s) Filter Magnetograph UV/EUV Spectrograph Energetic Particles Detector Coronagraph PYROTECHNICS PROCESSOR & LOCAL MEMORY FLIGHT S/W - CMD, TLM, Fault Prot. COMMAND & DATA HANDLING HEATERS SENSORS THERMOSTATS THERMAL POWER DISTRIBUTION UNIT REACTION WHEELS S/C POWER BUS PWR AMP DATA PROCESSING UNIT SOLAR ARRAYS THERMAL INTERFACE UPLINK/DOWNLINK INTERFACE DC/DC CONVERTER TRANSPONDER AVIONICS cPCI BACKPLANE SCIENCE INSTRUMENT INTERFACE SYSTEM I/O INTERFACES COARSE SUN SENSORS TORQUE BARS IMU STAR CAMERA G MAGNETOMETER