Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001geoji.145..307y&link_type=abstract
Geophysical Journal International, Volume 145, Issue 1, pp. 307-314.
Astronomy and Astrophysics
Astronomy
3
Covariance, Projection, Resolution Matrix, Tomographic Inversion
Scientific paper
When solving tomographic inversion problems, the resolution matrix for the equation system can provide very useful information on how well the model parameters can be resolved. Recently, Nolet et al. (1999)-referred to as NMV hereafter-proposed a one-step projection method to estimate the resolution matrix for massive tomographic problems. It was claimed by NMV that the approximations inherent in the one-step approach are of limited significance. We point out some of the problems associated with these approximations, and question whether the issue of the level of approximation has in practice been sufficiently addressed. We also suggest a modified approach that avoids some of the possible problems.
Roberts Richard G.
Tryggvason Ari
Yao Z. S.
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