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)


PHI FDT at 1 min cadence, processing to v_LOS only
(model as PHI_FDT_SYNOPTIC_5 with
parameters CADENCE = 60 [s]  COMPR = 8 IC = 0 )

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.
Higher compression may possibly be acceptable for far side imaging.

Science objectives

SAP objectiveTargetDurationOpportunity
(e.g., orbital requirements, solar cycle phase, quadrature ...)

Operational constraints 

Additional comments
4.2.3 Probe the structure in deep layers of the Sun - Deep focussingFull Diskseveral 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 DiskAs long as possible, 60 days would be ideal but may not be feasibleEarth (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

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  1. SOOP ID in SOOP Kitchen = RF2