Dataset Edition
| General information | |||
|---|---|---|---|
| Dataset name | MSG - SEVIRI - Downwelling Surface Shortwave radiation Flux - West Africa - 0.05 | ||
| Data type | LAND SURFACE | ||
| Created on | 2016-11-29 | ||
| Useful in the framework of | OPERATIONAL-DATA > Satellite products | ||
| Dataset Contact(s) | |||
| Data access |  Original dataset as provided by the Principal Investigator | ||
| History | ISSUE2016-11-29 | ||
| Purpose | These products are derived from SEVIRI/MSG data processed by the LSA SAF operational node at the Institute of Meteorology of Portugal.
The DSLF (Downwelling Surface Longwave radiation Flux) (W.m-²) is one of the most important components of the surface energy balance over land and can be defined as the thermal irradiance reaching the surface in the thermal infrared spectrum (4-100µm). The DSSF (Downwelling Surface Shortwave radiation Flux) (W.m-²) refers to the radiative energy in the wavelength interval [0.3µm – 4.0µm] reaching the Earth’s surface per time and surface unit. The LST (Land Surface Temperature) is the radiative skin temperature of the land surface. The broadband bi-hemispherical albedo (AL-BB-BH) is the fraction of the incoming solar radiation reflected by the land surface, integrated over the whole viewing and illumination directions, and integrated over the whole solar spectrum. An error (AL-BB-BH-ERR) is associated to albedo. A QFLAG is associated with each value of parameter. The Product User Manual documents describing the algorithms for each parameter are available in the website http://landsaf.meteo.pt in the section Algorithms. The meaning of QFLAG is also explained in the PUMs. Projection: The original LSA SAF products are presented in the satellite MSG projection. They have been put in the geographical lat/lon projection (plate-carrée) with a grid step equal to 0.05°. The West_Africa area, which covers the zone from 24.98° West to 24.98° East, and from 4.98° South to 19.98° North, have been extracted from the 0.05° resolution grid. The pixels of the grids are located by the coordinates of their center. Product Quality: The DSSF, DSLF, LST and AL-BB-BH products over West Africa display a line of no-data pixel for 0° of latitude. This is an impact of a problem concerning the cloud mask in the original LSA SAF algorithm. This is under correction at Institute of Meteorology. | ||
| Instrument | |||
| Satellite | MSG | ||
| Instrument | SEVIRI | ||
| Instrument type | Imaging Spectrometers/Radiometers | ||
| Parameters | |||
| Parameter name | Downwelling Surface Shortwave radiation Flux | ||
| Parameter keyword | Land Surface > Surface Radiative Properties | ||
| Unit | |||
| Coverage | |||
| Temporal Coverage | |||
| Date begin | 2005-07-13 | Date end | 2012-10-01 |
| Geographic Coverage | |||
| Area name | West_Africa | ||
| West bounding coordinate (°) | -24.98 | East bounding coordinate (°) | 24.98 |
| North bounding coordinate (°) | 19.98 | South bounding coordinate (°) | -4.98 |
| Data resolution | |||
| Temporal resolution | 0000-00-00 00:30:00 | ||
| Latitude resolution | 0.05 | ||
| Longitude resolution | 0.05 | ||
| Data use information | |||
| Use constraints | See AMMA data poolicy. | ||
| Data policy | AMMA data policy | ||
| Data format(s) | NetCDF | ||
