Investigating inversion uncertainties resulting from mode selections

Chia Hsien Lin, Werner Däppen

Research output: Contribution to journalConference articlepeer-review


The quality of an inversion depends on many factors. In addition to the well known ones, such as the target function, the surface term and the suppression parameters, different inversion codes utilizing different matrix inversion algorithms could also bring in an additional uncertainty. Therefore, it is important to assess the uncertainty and the stability of an inversion code prior using it to obtain any reliable result. The examination of our inversion code suggested the following: • low-degree low-order modes are essential for an accurate inversion; • when the quantity being inverted contains narrow features near the surface, the inversions using different mode sets would be inconsistent. In this paper, we show some representative results, in order to invite stimulating discussions and insightful suggestions.

Original languageEnglish
Pages (from-to)341-344
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number517
StatePublished - Feb 2003
EventPIC7 - Geneva, Switzerland
Duration: 30 Oct 20033 Nov 2003


  • Helioseismology
  • Inversion
  • Singular Value Decomposition
  • Sun
  • Uncertainties


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