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Workspace Method propmat_clearskyAddLines

Description

Computes the line-by-line unpolarized absorption and adds
it to the diagonal of propmat_clearsky and derivates to other variables.
Does the same for NLTE variables if required.

If *lines_speedup_option* is not "None", then some speed-up logic is applied.
Valid speed-up logic other than "None" includes:
    LinearIndependent:
        Using a sparse-grid, the points are separated as [f0, f0+df[0], f0+df[0], f0+df[1]...]
        until the entire f_grid is covered.  All sparse bins are on f_grid so df changes.
        A linear interpolation scheme is used between the bins to fill up the dense
        absorption.  The maximum of df[n] is given by *lines_sparse_df* and the minimum
        transition between dense-to-sparse grid calculations are given by *lines_sparse_lim*.
    QuadraticIndependent:
        Using a sparse-grid, the points are separated as [f0, f0+0.5*df[0], f0+df[0], f0+df[0], f0+0.5*df[1], f0+df[1]...]
        until the entire f_grid is covered.  All sparse bins are on f_grid so df changes.
        A quadratic interpolation scheme is used between the bins to fill up the dense
        absorption.  The maximum of df[n] is given by *lines_sparse_df* and the minimum
        transition between dense-to-sparse grid calculations are given by *lines_sparse_lim*.

Please use sparse_f_gridFromFrequencyGrid to see the sparse frequency grid

By default we discourage negative values, which are common when using one of the line mixing
approximations.   Change the value of no_negatives to 0 to allow these negative absorptions.

Authors: Richard Larsson

Synopsis

Variables