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This section proposes two methods for approximating the noise
covariance operator when coherent noise is present
in the data. But first, let us define as the sum of signal and coherent noise as follows:
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(18) |
where n is made of the inconsistent part (or modeling
uncertainties part) of the data d for any given operator
L. The goal of this Chapter is to estimate earth parameters
that are not biased by the noise present in the data.