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« Previous Version 8 Next » Energy and mass flux in the corona. Loss in form of conduction, radiation, gravitational enthalpy, and kinetic energy fluxes into the accelerating solar wind plasma.


Operational requirements table: 


YES / NO / Not required / MAYBE / GOOD TO HAVE / NUMBERS
Duration of the observationsA few hours. 
PerihelionYes, but not only. 
RS windowYes, but not only. 
High latitudeGood to haveLow and high latitude
Solar cycle dependenceYes 
Radial dependenceYes 
Linkage scienceGood to haveA few hours of connected observations.
Multiple orbitsYes 
Far side observationsNo 
Earth observationsNo 
EMC QuietYesBut not during RS windows.
SPPGood to have 

Mostly IS, but some RS too.


Required observations:

  • SWASWA Normal Mode, A few hours of connected observations, other instruments: ALL.
  • MAGMAG Normal Mode.
  • EUIEUI synoptic mode (S). Modes Q (EUI Quiet Sun mode (Q)), C (EUI Coronal hole mode (C)) and A (EUI Active Region mode (A)) with min observation time 1h ( ? ). HRI Ly-alpha, 174 (FSI 304 with same cadence?). Other instruments: SPICE.
  • PHI

    FDT medium  resolution data


    FOV [pixels]

    1024 x 1024


    Ic, vLOS, B


    10 days


    1/(10 min)

    N orbits


    solar distance

    entire orbit

    PHI operating mode




    • Measurement of the solar wind outflow velocity gradient in the outer corona, to localise regions of energy deposition, via Doppler dimming of the HI Lyα intensity in the field of view 1.5-2.9 degrees. Measurement of the magnetic field topology through the global corona configuration. Measurements of the brightness fluctuation spectra.
    • Products:
      • Global maps of outflow velocity in corona.
      • Global maps of the electron density in corona/coronal configuration.
      • Brightness fluctuation spectra.
    • Modes:
      • WIND (min. obs time 2 hr, data volume ≤ 300 Mb)
      • MAGTOP (min. obs time 2 hr, data volume ≤ 480 Mb)
            Repeated each day in available observation windows.
      • FLUCTS (min. obs time 1 hr, data volume  ~ 2 Gb) at perihelion. 
    • Other instruments: PHI, EUI, SPICE, STIX.
  • All instruments.


  • A few hours of connected observations.

Other constraints:


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