Figure 1
From: Solution of underdetermined systems of equations with gridded a priori constraints
Schematic representation of the TOPINV inversion in the case of intersection of three azimuth lines. (a) Because of measurement errors (shaded areas), the three azimuths (directions relative to the north) do not converge into a single point. (b) Introducing an uncertainty angle based on the standard errors σ, each of these areas corresponds to an uncertainty area S j . (c-e). Using a scale factor k, the optimal common section S of areas S j can be obtained.