STEP 2/4 to bring code to gencost framework: c. define appropriate masks, "weight", proxy obs-model 2d fields for [de,ex]conc costs, d. take all cost terms outside bi/bj loop using ecco_addcost call, e. remove un-used ecco_readwei call outside mainloop,
STEP 2/4 to bring code to gencost framework:
c. define appropriate masks, "weight", proxy obs-model 2d fields for [de,ex]conc costs,
d. take all cost terms outside bi/bj loop using ecco_addcost call,
e. remove un-used ecco_readwei call outside mainloop,

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