TransCom3 interannual inversion setup:
Solve for monthly CO2 fluxes from 22 regions,
1988-2003,  using monthly concentrations from 78 sites
Problem setup:  78 time series 1988-2003, solve for MONTHLY fluxes for 22 regions, using MONTHLY averaged data. So 22x12x16 fluxes, 78x12x16 measurements   [14976 x 4224]