Note on cloud cover of the ECMWF nature run used for OSSE/NPOESS project Note on cloud cover of the European Centre for Medium-Range Weather Forecasts nature run used for Observing System Simulation Experiments/National Polar-orbiting Operational Environmental Satelites System project

"Global atmospheric observing systems, such as those on Polar-orbiting Operational Environmental Satellites (POES), provide the basic data for Numerical Weather Prediction (NWP) forecasts and the means to monitor and assess climate. The National POES System (NPOESS) is scheduled to fly in the 2009-2018 time frame. During the next decade, a considerable amount of effort must take place to define, develop and build the suite of instruments which will comprise the NPOESS. Prior to NPOESS, the NPOESS Preparatory Project (NPP) is schedule to fly by 2005. These experiments known as Observing System Simulation Experiments (OSSEs) is conducted as a part of NPP. While forecast impact of current instruments can be assessed by Observing System Experiments, in which already existing observations are denied or added to observations from a standard data base, the impact of future instruments must be assessed with experiments using simulated observations by OSSE"--Introduction, paragraph 1. Michiko Masutani, Kenneth A. Campana, Stephen J. Lord, Shi-Keng Yang. Title from cover. "October 1999." Also available online in PDF via the NOAA Central Library. Includes bibliographical references (leaves 16-17). 1999 NWS (National Weather Service) NCEP (National Centers for Environmental Prediction) Library Public Domain 2285