Abstract: A dual spectroradiometer system for field measurements of spectral reflectances over natural surfaces was developed and tested. Tests show that simultaneous incident and reflected readings are highly desirable to eliminate ...

Abstract: A series of numerical experiments was conducted in which asynoptic observations of the mass field were assimilated in a primitive equation, barotropic model with and without a local wind adjustment at insertion times. ...

Abstract: A description is given of the global data assimilation system developed at the National Meteorological Center for treating the heterogeneous global data base. The system is based on updating a nine-level primitive equation ...

Abstract: In preparation for the execution of the National Meteorological Center and National Center for Atmospheric Research (NMC/NCAR) Reanalysis Project, which will cover the period 1958?93, the impact of satellite data on both ...

Abstract: The NCEP and NCAR are cooperating in a project (denoted ?reanalysis?) to produce a 40-year record of global analyses of atmospheric fields in support of the needs of the research and climate monitoring communities. This ...