NCAR Resarch Data Archive logo

NCEP ADP ETA / NAM Upper Air Observation Subsets

| DOI: 10.5065/4F6T-NT78

This historical dataset is recommended for ancillary use only and not as a primary research dataset. It has likely been superseded by a newer, improved dataset.


NCEP ADP ETA / NAM Upper Air Observation Subsets are composed of a regional synoptic set of upper air reports centered over North America, operationally collected by the National Centers for Environmental Prediction (NCEP). These include radiosondes, pibals and aircraft reports from the Global Telecommunications System (GTS) and satellite data from the National Environmental Satellite Data and Information Service (NESDIS). The reports can include pressure, geopotential height, temperature, dew point depression, wind direction and speed. Data may be available at up to 20 mandatory levels from 1000 millibars to 1 millibar, plus a few significant levels. Report time intervals range from 3 hourly to 12 hourly. These data are the primary input to the EDAS / NAM Data Assimilation System (NDAS starting January 23, 2005). DS351.0 provides global data coverage over the same time period.

This data set is no longer updated.

If you have a need for North American data that is not met by DS351.0 NCEP ADP Global Upper Air Observational Weather Data, October 1999 - continuing, contact the RDA for alternatives.

Temporal Range:
2000-10-23 to 2017-03-19
Atmospheric Pressure Measurements Dew Point Temperature Geopotential Height Surface Winds
Upper Air Temperature Upper Level Winds
Data Types:
Platform Observation
Data Contributors:
Satellite Services Division, Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Total Volume:
144.32 GB
Data Formats:
Related RDA Datasets:
Historical Unidata Internet Data Distribution (IDD) Global Observational Data
NCEP ADP Global Upper Air and Surface Weather Observations (PREPBUFR format)
NCEP ADP Global Upper Air Observational Weather Data, October 1999 - continuing
NCEP ADP Operational Global Upper Air Observations, December 1972 - February 2007
NCEP ADP Global Surface Observational Weather Data, October 1999 - continuing
Metadata Record:
Data License:
Citation counts are compiled through information provided by publicly-accessible APIs according to the guidelines developed through the project. If journals do not provide citation information to these publicly-accessible services, then this citation information will not be included in RDA citation counts. Additionally citations that include dataset DOIs are the only types included in these counts, so legacy citations without DOIs, references found in publication acknowledgements, or references to a related publication that describes a dataset will not be included in these counts.