What is the difference between MAPS and RUC?
MAPS is the development version of the RUC, run in real time at FSL. RUC is the operational version, run at NCEP. So, MAPS is an experimental version of the RUC. Only the RUC runs in the fully operational sense at NCEP. (However, an official backup RUC does run at FSL.) Both MAPS and RUC are high-frequency data assimilation and mesoscale numerical weather prediction systems.