! sens/instr/sat lev  use pressure gross   obs    b_aero  pg_aero
!                                  error  error variational qc
 modis_aqua       1    -1   0.000  0.500  0.350  1.000  0.000
 modis_terra      1    -1   0.000  0.500  0.340  1.000  0.000