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NCEP ADP Global Upper Air Observational Weather Data are composed of
global upper air weather reports 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, air
temperature, dew point temperature, 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 intervals range
from hourly to 12 hourly. These data are the primary input to the
NCEP Global Data Assimilation System (GDAS), which is used to create
the NCEP Final Tropospheric Analyses (FNL).
Full daily data can be downloaded in BUFR or LITTLE_R format.
Spatial subsets decoded into ASCII can also be selected by
latitude/longitude or station ID.
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