BackForwardInstrument:  GOLF 

Instrument details
Acronym GOLF
Full name Global Oscillations at Low Frequencies
Purpose Observation of global sun velocity and magnetic field oscillations
Short description Measurement of the spectrum of free global oscillations in the frequency range 1x10-7 to 6x10-2 Hz and the line-of-sight velocity of the viewed solar surface with sensitivity 1 mm/s
Background Part of a package of instruments to observe the solar atmosphere
Scanning Technique Sun pointing from the L1 Lagrange libration point
Resolution N/A (full disk)
Coverage / Cycle Continuous over the full solar disk
Mass Power Data Rate


Providing Agency CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1996 to 2025
Last update: 2021-12-04
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents
  • Subcomponent 1
  • Solar coronagraph and radio- spectrograph, at L1
  • Solar radio wave receiver at L1
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar radio wave sensor [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Solar radio flux spectrum
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Solar radio flux spectrum*3 - highNo specific limitation.Wide dynamic range