Nonlinear force-free coronal magnetic field modelling and preprocessing of vector magnetograms in spherical geometry

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Volume 508 / No 1 (December II 2009)

A&A, 508 1 (2009) 421-432

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Table 2:

Figures of merit for the three different noise models with and without preprocessing along with model reference field and potential field.
Model	Preprocessed	L	L₁	L₂	$\parallel \nabla \cdot {\bf B} \parallel_{\infty}$	$\parallel {\bf j } \times {\bf B} \parallel_{\infty}$	$C_{\rm vec}$	$C_{\rm CS}$	E_N	E_M	$\epsilon$	Steps
Original		0.029	0.015	0.014	1.180	1.355	1	1	0	0	1
Potential		0.020	0.007	0.014	1.706	1.091	0.736	0.688	0.573	0.535	0.676
Noise model I	No	22.015	8.612	13.403	25.531	11.671	0.819	0.767	0.337	0.421	0.861	1337
Noise model I	Yes	0.105	0.066	0.039	1.746	1.806	0.951	0.947	0.197	0.105	0.964	12 191
Noise model II	No	18.957	7.915	11.042	23.089	9.871	0.828	0.774	0.321	0.417	0.869	1484
Noise model II	Yes	0.097	0.057	0.040	1.533	1.617	0.963	0.951	0.191	0.099	0.971	11 423
Noise model III	No	17.718	7.615	10.103	20.763	8.992	0.859	0.781	0.310	0.402	0.873	1497
Noise model III	Yes	0.081	0.043	0.038	1.382	1.407	0.979	0.957	0.189	0.098	0.982	10 378

Source LaTeX | All tables | In the text

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