Table 5 True values, search space, and inversion results for dual anomaly case using EKI with noise-free and 10% Gaussian noise-contaminated data.
Model parameters | True | Search space | Noise free | Noise contaminated |
|---|---|---|---|---|
\({A_1}\left( {{\text{~mGal}}.{{\text{m}}^2}{\text{~}}} \right)\) | 600 | 400–700 | 639.22 ± 18.70 | 640.45 ± 36.21 |
\({z_1}\left( m \right)\) | 20 | 10–40 | 19.73 ± 0.38 | 20.98 ± 0.44 |
\({x_{01}}\left( m \right)\) | -150 | -200–200 | -149.99 ± 0.01 | -149.77 ± 0.05 |
\({q_1}\) | 1.5 | 0.5–1.5 | 1.47 ± 0.03 | 1.49 ± 0.13 |
\({\mu _1}\) | 1 | 0–1 | 0.91 ± 0.08 | 0.99 ± 0.29 |
\({A_2}\left( {{\text{~mGal}}.{{\text{m}}^2}{\text{~}}} \right)\) | 150 | 50–300 | 212.66 ± 19.89 | 247.07 ± 20.56 |
\({z_2}\left( {\text{m}} \right)\) | 40 | 20–80 | 40.04 ± 0.04 | 42.32 ± 0.27 |
\({x_{02}}\left( m \right)\) | 100 | -200–200 | 99.99 ± 0.00 | 100.36 ± 0.03 |
\({q_2}\) | 1 | 0.5–1.5 | 1.00 ± 0.00 | 1.04 ± 0.00 |
\({\mu _2}\) | 1 | 0–1 | 0.90 ± 0.02 | 0.96 ± 0.03 |
Minimum objective function (mGal) | 7.68e-05 | 0.14 | ||
The median objective function (mGal) | 2.48e-04 | 0.14 | ||
The interquartile range of the objective function (mGal) | 1.10e-04 | 1.29e-05 | ||
