 ds336.0 Home Page Help
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Historical Unidata Internet Data Distribution (IDD) Global Observational Data, May 2003 - current
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This free dataset, derived from real-time Global Telecommunications System
(GTS) reports distributed via the Unidata Internet Data Distribution System (IDD),
includes surface station (SYNOP) reports at 3-hour intervals,
upper air (RAOB) reports at 3-hour intervals, surface station (METAR) reports at 1-hour intervals, and
marine surface (BUOY) reports at 1-hour intervals. Select variables found in all report types
include pressure, temperature, wind speed, and wind direction. Report specific
descriptions and variable types can be found
in the ds336.0 documentation page.
The most current three months of data are available online through the
ds336.0 data page.
Online archives are populated daily with reports generated two days prior to the current date.
Older historical files, begining in May 2003, are available upon request.
All reports are encoded from the raw GTS datastream format into NetCDF format without
quality control performed. More complete, quality controlled archives of surface observations can be found in
ds464.0,
and ds461.0.
More complete, quality contolled archives
of upper air observations can be found in ds353.4,
and ds351.0.
More information is available.
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Click a  icon for more details
| PERIODS: |
2003-05-18 00:00:00 +0000 to 2007-09-12 00:00:00 +0000
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| UPDATES: |
Daily (nominally)
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| VARIABLES: |
| Air Temperature | Cloud Amount/Frequency | Cloud Base | Cloud Types |
| Dew Point Temperature | Humidity | Precipitation Amount | Sea Level Pressure |
| Sea Surface Temperature | Snow | Station Height | Surface Pressure |
| Surface Winds | Swells | Upper Level Winds | Visibility |
| Wave Height | Wave Period | | |
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| LEVELS: |
| Ground or water surface | 50 mbar | 200 mbar | 250 mbar |
| 300 mbar | 500 mbar | 700 mbar | 850 mbar |
| 900 mbar | 1000 mbar | Mean sea level | |
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| TIMES: |
Every 3 hours
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| TYPES: |
Location
Platform Observation
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| SOURCES: |
UCAR/UNIDATA Unidata, University Corporation for Atmospheric Research
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| VOLUME: |
146.23 GBytes (Entire dataset)
 Volume details by subset Volume details by subset:
Global Surface Observations files: 138.69 GBytes
Global Upperair Observations files: 7.54 GBytes
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| FORMATS: |
netCDF
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| CONTACT: |
For assistance with this dataset, please contact
Doug Schuster (303-497-1216)
. If the specialist is unavailable, please contact
Data Help.
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| RELATED DATASETS: |
ds335.0 - Historical Unidata Internet Data Distribution (IDD) Gridded Model Data, December 2002 - current
ds351.0 - NCEP ADP Global Upper Air Observation Subsets, daily, April 2000 - continuing
ds353.0 - NMC B-3 ADP Global Upper Air Observations, daily 1962Mar-1972
ds353.4 - NCEP ADP Global Upper Air Observation Subsets, January 1973 - continuing
ds461.0 - NCEP ADP Global Surface Observations, daily, April 2000 - continuing
ds464.0 - NCEP ADP Global Surface Observations, February 1975 - continuing
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| DATA ACCESS: |
Click the  tab here or in the navigation bar at the top of the page. |
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