WNG Flag: Use Far-wing Cutoff for Lines
This flag will be discontinued from RFM v5 onwards
Only include lines within 200 Voigt halfwidths of grid points within fine-mesh calculation
lines within adjacent widemesh intervals (3 x 1 cm
The WNG flag only affects the fine-mesh calculation. The main purpose is to avoid spending time computing absorption coefficients for Doppler-broadened lines which are well beyond the line half-width.
The number of half-widths for exclusion (200) is set by the parameter
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