Define a MYSTIC 2D albedo input file (default: albedo2D.dat).
mc_albedo_file file
Nx Ny dx dy
ix iy albedo
...
The format of the albedo file is:
where Nx and Ny are the number of grid boxes in x- and y-direction,
dx and dy are the size of the pixels in km.
In the second and the following lines the indices in x- and y-direction
(ix=1…Nx; iy=1…Ny) and the albedo of the pixel are specified.