The European Space Agency
General Description
SOOP designed for global helioseismology with PHI/FDT only. The PHI configuration is currently designed to fulfil helioseismology needs for far side imaging - to detect modes passing through the solar core - and for deep focussing. Note that the specified PHI mode is not (yet) part of the predefined PHI modes.
Default SOOP duration: ~4 days
Pointing requirements: Disk Centre
Triggers: none
Observations requirement (baseline)
|
Instrument |
Mode |
Comment |
|---|---|---|
|
PHI |
PHI FDT at 1 min cadence, processing to v_LOS only TBC by PHI that the new mode PHI_globalseismology_FDT_3 (4x4 binning!) does the job. |
Images compressed by binning to 2x2 or cropping when farther away from the Sun. |
Science objectives
|
SAP objective |
Target |
Duration |
Opportunity |
Operational constraints |
Additional comments |
|---|---|---|---|---|---|
|
4.2.3 Probe the structure in deep layers of the Sun - Deep focussing |
Full Disk |
several days (e.g. 3 days) |
Earth (SDO/HMI) - SC angle between 45 and 60 degrees |
|
10-15Mm resolution, i.e. 2x2 binning at perihelion or cropping further out |
|
4.2.3 Probe the structure in deep layers of the Sun - Far side imaging to detect modes passing through the solar core. |
Full Disk |
As long as possible, 60 days would be ideal but may not be feasible |
Earth (SDO/HMI) observations in combi with PHI observations at far side: angle 150 to 210 degrees. |
|
Low resolution, v_LOS only but 1min cadence. Compression can be quite high (TBC how high). |
Instances run / planned
2022-01-20 to 24 (SOOP Coordinators: T. Appourchaux, J. Schou):
The resolution was too low for the intended purpose, about 5.8 arcmin.
Further information
From Obj 4 meeting
This SOOP was inspired on the discussion about Global Helioseismology needs during the Objective 4 meeting in MPS, Göttingen (Oct 2016).
Original SOOP proposers
M. Roth, J. Hirzberger, L. Gizon, J. Schou