ARTS built-in documentation server
Workspace Method f_gridMetMM
Sets f_grid and associated variables match MetMM settings.
The method calculates f_grid to match the specifications of a
met_mm_backend table and method arguments.
You have to specify the desired spacing using the keyword *freq_spacing*.
You can pass a Vector with one element to apply the same spacing to all
channels or pass a spacing value for each channel separately.
Optionally, *freq_number* can be set to specify the mininum number of
frequencies per passband for each channel. The frequencies are placed
equally spaced in each passband. The minimum spacing resulting from
*freq_number* and *freq_spacing* will be used for the calculation. To
explicitly use *freq_spacing* for a channel, *freq_number* can be set
to -1 for this channel.
The number of elements in *freq_number* can either be the number of
channels or 1. If only one element is given, this number is used for
all channels. If *freq_number* is 1 and *freq_spacing* is wider than
the bandwidth of the channel, one frequency is placed in the middle of
Frequencies that would be closer than *freq_merge_threshold* in the
generated f_grid are merged together. This value should be left at
the default value. This is only meant to compensate for numerical
inaccuracies in the frequency calculation to merge frequency that are
supposed to be identical.
Authors: Oliver Lemke, Patrick Eriksson