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Description of the objective:


  • Identify coronal shocks and characterize their spatial distribution and outward propagation velocity.
  • Study interaction with coronal plasma.
  • Characterize the longitudinal distribution of coronal shocks during high latitude orbits. 

 

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  • SPICE
      • Target: Active Regions, Prominences.
      • Observing mode: Dynamics, CME Watch (with possibility to measure Doppler velocities).
      • Slit size:  2” for Dynamics; 6” for CME Watch.
      • Exposure time/cadence and number of X positions:  5 s, X=160 for Dynamics; 30 s, X=160 for CME Watch.
      • Field of View:  5’×11’ for Dynamics; 16’×11’ for CME Watch. 
      • Number of repetitions of the study:  3 Dynamics followed by 1 CME Watch (possibly twice repeat for each target).
      • Observation time per day:  2.7 hours for a combination (3 Dynamics and 1 CME Watch – 0.4 hours per study for Dynamics and 1.3 hours per study for CME Watch).
      • Key SPICE lines to be included:   H I 1025 Å, C III 977 Å, O VI 1032 Å, Ne VIII 770 Å, Mg IX 706 Å, Si XII 520 Å (x2) – 10 lines (4 profiles and 6 intensities) for Dynamics; C III 977 Å, O VI 1032 Å, O VI 1037 Å, Ne VIII 770 Å, Mg IX 706 Å, Fe X 1028 Å and Fe XX 721 Å (the last line in case of a flare)– 15 lines (5 profiles+10 intensities) for CME watch.
      • Observing window preference: 
      • Other instruments:  EUI, PHI, possibly SWA, EPD.
      • Comments:  The choice of lines, and also the number of intensities and profiles, is flexible, although the sum of the intensities and profiles is constrained to a maximum (e.g 15 for composition mapping). While varying the number of intensities and profiles, within the maximum, has no effect on the duration of the study, it will have an effect on the telemetry.