Global Data Assimilation System (GDAS)

Description

The Global Data Assimilation System (GDAS) is the system used by the Global Forecast System (GFS) model to place observations into a gridded model space for the purpose of starting, or initializing, weather forecasts with observed data. GDAS adds the following types of observations to a gridded, 3-D, model space: surface observations, balloon data, wind profiler data, aircraft reports, buoy observations, radar observations, and satellite observations. GDAS data are available as both input observations to GDAS and gridded output fields from GDAS. Gridded GDAS output data can be used to start the GFS model. Due to the diverse nature of the assimilated data types, input data are available in a variety of data formats, primarily Binary Universal Form for the Representation of meteorological data (BUFR) and Institute of Electrical and Electronics Engineers (IEEE) binary. The GDAS output is World Meteorological Organization (WMO) Gridded Binary (GRIB).

Resources

Name Format Description Link
Global Change Master Directory (GCMD) Keywords Unknown The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. Open resource
Global Change Master Directory (GCMD) Keywords Unknown The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. Open resource
Global Change Master Directory (GCMD) Keywords Unknown The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. Open resource
Global Change Master Directory (GCMD) Keywords Unknown The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. Open resource
Global Change Master Directory (GCMD) Keywords Unknown The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. Open resource
NOAA National Centers for Environmental Information (NCEI) Unknown NCEI home page with information, data access and contact information. Open resource
NCEI Dataset Order (GDAS - Daily Bufr Files) Unknown Select and order files in the offline archive. Open resource
NCEI Dataset Order (GDAS - Daily Tar Files) Unknown Select and order files in the offline archive. Open resource
NCEI Dataset Order (GDAS - Hourly Tar Files) Unknown Select and order files in the offline archive. Open resource
NCEI Dataset Landing Page Unknown Landing page for the dataset. Open resource
NCEI Direct Download (Dataset Files) HTML Direct download for the dataset. Open resource
NCEI Product Information Page Unknown Description of the data and related resources. Open resource
EMC GDAS Web Site Unknown Web site providing overview and technical documentation for the GDAS. Open resource
EMC GDAS Web Site Unknown Web site providing overview and technical documentation for the GDAS. Open resource

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