narr_fix_rr1 The NARR (ETA/NAM) GRIB files used non-standard GRIB conventions. Rather than setting values to undefined (using the undefined bitmap, BMS), they set values to some "unrealistic" values. For NARR, we needed to set the undefined values to the GRIB standard undefined. fix_rr1 uses the land-sea mask to maskout certain land-only quantities and other logic to cloud free regions, etc. Calling convetion: narr_fix_rr1.x [in gribfile] [out gribfile] awipland.grb