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« Previous Version 7 Next » Detect and characterise waves in closed and open structures (e.g. De Pontieu et al., 2007), looking for signatures of their dissipation in the transition region and low corona, with a corresponding evaluation of the energy released to heat the solar plasma.


Targets: AR (also closed loops in QS?), on-disk and also off-limb (for spicules).


Maybe divide this objective per target?


Operational requirements table: 


YES / NO / Not required / MAYBE / GOOD TO HAVE / NUMBERS
Duration of the observationsSeveral hours depending on the target 
RS windowYes 
High latitude 

High latitude for plumes (PHI)

Better at perihelion for METIS for polar plumes


Solar cycle dependenceGood to have 
Radial dependenceNo 
Linkage scienceNo 
Multiple orbitsGood to have 
Far side observationsNo 
Earth observationsGood to have 
EMC QuietNo 
InstrumentsEUI, PHI, METIS for plumes

RS only



Cadence: 1 min


  • PHI

    HRT medium  resolution data


    FOV [pixels]

    1024 x 1024


    Ic, vLOS, B, γ, φ (interlaced with raw data)


    2 days


    full magnetogram once per hour, for plumes

    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.
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