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Workspace Method surface_complex_refr_indexFromGriddedField5
Extracts complex refractive index from a field of such data.
The method allows to obtain surface_complex_refr_index by
interpolation of a geographical field of such data. The position
for which refraction shall be extracted is given by rtp_pos.
The refractive index field is expected to be stored as:
Vector "Latitude" [N_lat]
Vector "Longitude" [N_lon]
Definition and treatment of the three first dimensions follows
complex_refr_index, e.g. the temperature grid is allowed
to have length 1. The grids for latitude and longitude must have
a length of >= 2 (ie. no automatic expansion).
Hence, this method performs an interpolation only in the lat and
lon dimensions, to a single point. The remaining GriddedField3 is
simply returned as surface_complex_refr_index.
Authors: Patrick Eriksson