Estimation of the magnetotelluric impedance functions

Details Estimation of the magnetotelluric impedance functions Estimation of the magnetotelluric impedance functions

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...17...75j&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 17, Issue 2, p. 75-82.

Physics

3

Scientific paper

The successful interpretation of magnetotelluric data demands well presented, and accurate, estimates of the impedance and tipper functions. In this paper, a method based on the singular value decomposition of the local data matrix, using well known results from multivariate statistical analysis, is proposed as an alternative to current least-squares methods. The advantage obtained is that error on all data channels is recognised, so that impedance estimates are not biased by the choice of ``independent noise-free'' fields. An important result of the method is an extensive and structured capability for the analysis of the frequency-dependent noise which could be used to improve the resulting impedance estimates.

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