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Data Coverage
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These pages provide access to colour-coded plots of the observation data available for use by the 4DVAR data assimilation scheme. These plots therefore show those observations which remain after any observation processing has taken place, including quality control and data selection.
The plots are produced automatically after the global model runs, and are updated on this page once per day at approximately 0600 UTC.
Click on the image to see the full-size plot (800x600 pixels)
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Click on the drop-down menus above the image to see data coverage plots for the different observation types at each of the four different global model run times (00 UTC, 06 UTC, 12 UTC and 18 UTC). For example, to see 'Surface' observations available to the model run at 1200 UTC, select '12 UTC' from the first drop-down list, then select 'Surface' from the second drop-down list. The image will then change to show the surface data coverage plot.
Each plot shows the data coverage for a number of observation subtypes. The number of observations present within each subtype is shown in brackets in the key on each plot.
Shown below are the different data coverage plots available (Sonde, ATOVS etc), with their associated observation subtypes (and the approximate colour they are plotted in). For more information on observations, see the observations page.
Sonde:
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PILOT LAND |
Upper-air wind profiles from land-based radiosondes |
| PILOT SHIP |
Upper-air wind profiles from ship-based radiosondes |
| PILOT MOBILE |
Upper-air wind profiles from mobile radiosondes |
| TEMP LAND |
Upper-Air temperature, humidity and wind profiles from land-based radiosondes |
| TEMP SHIP |
Upper-Air temperature, humidity and wind profiles from ship-based radiosondes |
| TEMP MOBILE |
Upper-Air temperature, humidity and wind profiles from mobile radiosondes |
| DROPSOND |
Upper-Air temperature, humidity and wind profiles from drop sondes |
| WINPRO |
Upper-air wind reports from NOAA wind profilers |
ATOVS:
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NOAA-15 ATOVS |
Radiance data from the ATOVS instrument on the NOAA-15 satellite |
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NOAA-16 ATOVS |
Radiance data from the ATOVS instrument on the NOAA-16 satellite |
Aircraft:
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| | AMDARs |
Reports from selected aircraft carrying ASDAR or ACARS automatic data-collection systems |
| AIREPs |
Single level aircraft data reported at intervals of 10 deg longitude |
Satwind:
| SATOB |
JMA satob-coded winds |
| GOESAMW |
NESDIS GOES satob-coded (infrared) winds |
| ESAHRVW |
EUMETSAT Meteosat BUFR-coded (visible) winds |
| ESACMW |
EUMETSAT Meteosat BUFR-coded (infrared) winds |
| ESAHRWVW |
EUMETSAT Meteosat BUFR-coded (water vapour) winds |
Surface:
| LNDSYN |
Land synoptic reports |
| SHPSYN |
Ship and moored buoy synoptic reports |
| BUOY |
Drifting buoy reports |
SSM/I:
| SSM/I |
Micro-wave radiances from Special Sensor Microwave Imager on DMSP satellites |
Scatwind:
| Seawinds Scat |
Seawinds data obtained from QuikSCAT |
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| ACARS |
ARINC Aircraft Communications Addressing and Reporting System |
| AIREP |
AIRcraft REPorts |
| AMDAR |
Aircraft Meteorological Data And Reporting Relay |
| ARINC |
Aeronautical Radio INCorporated |
| ASDAR |
Aircraft to Satellite DAta Relay |
| (A)TOVS |
(Advanced) TIROS Operational Vertical Sounder |
| BUFR |
Binary Universal Form for the Representation of Meteorological Data |
| DMSP |
Defence Meteorological Satellite Program (US Air Force) |
| ERS |
European Remote-sensing Satellite |
| EUMETSAT |
European Organisation for the Exploitation of Meteorological Satellites |
| GOES |
Geostationary Operational Environment Satellite |
| JMA |
Japan Meteorological Agency |
| NESDIS |
National Environmental Satellite, Data, and Information Service |
| NOAA |
National Oceanic and Atmospheric Administration |
| SSM/I |
Special Sensor Microwave Imager |
| TIROS |
Television Infrared Observation Satellite
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| UTC |
Universal Time Co-ordinated
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