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Immagini EumetSat

  MSG IMAGERY IR039 BW   Infrared Spectral Channel 3.9µm over a black and white background. Mainly to observe surface, clouds and winds.  
 
  MSG IMAGERY IR039 COLOR   Infrared Spectral Channel 3.9µm over a color background.  
 
  MSG IMAGERY IR108 BW   Infrared Spectral Channel 10.8µm over a black and white background.  
 
  MSG IMAGERY IR108 COLOR   Infrared 10.8µm Channel over a color background.  
 
  MSG IMAGERY VIS006 BW   Visible Channel over a black and white background.  
 
  MSG IMAGERY VIS006 COLOR   Visible Channel over a color background.  
 
  MSG IMAGERY WV062 BW   Water Vapour Channel 6.2 over a black and white background.
 
  MSG PRODUCTS AMV   The Atmospheric Motion Vectors (AMV) product consists wind vectors computed at differend heights derived by tracking the motion of the clouds and other atmospheric constituents (e.g. water vapour patterns and ozone). In this example, the wind vectors are derived IR 10.8 images.  
 
  MSG PRODUCTS MPE   The Multi-Sensor Precipitation Estimate (MPE) product consists of the near-real-time rain rates in mm/hr for each Meteosat image in original pixel resolution. The algorithm is based on the combination of polar orbiter microwave measurements and images in the Meteosat IR channel by a so-called blending technique. The MPE is most suitable for convective precipitation. Applications and Users: Operational weather forecasting in areas with poor or no radar coverage, especially in Africa and Asia.  
 
  MSG PRODUCTS FIR   The active fire monitoring product (FIR) is a fire detection product indicating the presence of fire within a pixel. The underlying concept of the algorithm takes advantage of the fact that SEVIRI channel IR3.9 is very sensitive to hot spots which are caused by fires. The algorithm distinguishes between potential fire and active fire. Applications and Users: Fire detection and monitoring.  
 
  MSG PRODUCTS GII   The Global Instability Index (GII) represents the atmospheric air mass instability in cloud free areas. The original statistical algorithm was developed by the SAF in support of Nowcasting and Very Short Range Forecasting but the GII is produced at EUMETSAT. The algorithm has later been replaced by a physical retrieval scheme. Applications and Users: Nowcasting (forecasting up to six hours) severe weather.  
 
  MSG PRODUCTS CLA   The Cloud Analysis (CLA) Product provides an identification of cloud layers with cloud type and coverage, height and temperature. Applications and Users: Weather forecasting, numerical weather prediction, climate research and monitoring.  
 
  MSG PRODUCTS CLAI   The Cloud Analysis Image (CLAI) provides an identification of scenes type for each image segment. This is an image product derived along with CLA. Applications and Users: Weather forecasting, numerical weather prediction, climate research and monitoring. This is an image product derived along with CLA.  
 
  MSG PRODUCTS CLM   The Cloud Mask (CLM) product describes the scene type (either clear or cloudy) on a pixel level. Each pixel is classified as one of the following four types: clear sky over water, clear sky over land, cloud or not processed (off Earth disc). Applications and Users: The main use is in support of Nowcasting applications, where it frequently serves as a basis for other cloud products, and the remote sensing of continental and ocean surfaces.  
 
  MSG PRODUCTS CTH   The Cloud Top Height (CTH) product indicates the height of highest cloud. Based on a subset of the information derived during Scenes and Cloud Analysis, but also makes use of other external meteorological data. Applications and Users: Aviation meteorology.  
 
  MSG PRODUCTS TH   The Tropospheric Humidity Product (TH) provides relative humidity in both mid and upper layers of the troposphere, using a 16 x 16 pixel segment grid. The upper level is derived from the mean layer relative humidity between about 600 hPa and 300 hPa using the WV6.2 micron channel, while mid-tropospheric humidity represents the mean value between 850 hPa and 600 hPa using the WV7.3 micron channel
 
  MSG RGB AIRMASS   Airmass is an RGB composite based upon data from infrared and water vapour channels from Meteosat Second Generation. It is designed and tuned to monitor the evolution of cyclones, in particular rapid cyclogenesis, jet streaks and PV (potential vorticity) anomalies. Due to the incorporation of the water vapour and ozone channels, its usage at high satellite viewing angles is limited. The Airmass RGB is composed from data from a combination of the SEVIRI WV6.2, WV7.3, IR9.7 and IR10.8 channels  
 
  MSG RGB ASH   Ash is an RGB composite based upon infrared channel data from the Meteosat Second Generation satellite. It is designed to detect ash and sulphur dioxide (SO2) from volcanic eruptions which can be used for the provision of warnings to aviation authorities. The Ash RGB is composed from data from a combination of the SEVIRI IR8.7, IR10.8 and IR12.0 channels.  
 
  MSG RGB CON   The Convection RGB combines the brightness temperature difference (BTD) between the WV6.2 and WV7.3 channels (on red), the BTD between the IR3.9 and IR10.8 channels (on green) and the reflectance difference between the NIR1.6 and the VIS0.6 channels (on blue). Severe convective storms appear bright yellow in this color scheme because of the near zero BTD WV6.2-WV7.3 of overshooting Cb clouds (high red). The strong updrafts in these clouds produce small ice particles at cloud tops due to homogeneous freezing of cloud drops, resulting with large BTD IR3.9-IR10.8 (high green). Finally, large negative values of NIR1.6-VIS0.6 because of the large absorption at NIR1.6 by ice particles keeps the blue very low. Please note that small ice crystals of Cirrus clouds should not be confused with vigorous convection. Inferred small ice crystals that are not associated with anvils of Cb clouds must form by elevated strong updrafts, such as in high altitude orographic wave clouds.  
 
  MSG RGB EVIEW   E-View is an RGB composite based upon data from the Meteosat Second Generation satellite. It is dedicated to detailed cloud monitoring of the European region. It is based on data from the SEVIRI High Resolution Visible channel combined with data from the IR10.8 channel.  
 
  MSG RGB DUST   Dust is an RGB composite based upon infrared channel data from the Meteosat Second Generation satellite. It is designed to monitor the evolution of dust storms during both day and night. The Dust RGB is composed from data from a combination of the SEVIRI IR8.7, IR10.8 and IR12.0 channels  
 
  MSG RGB FOG   Fog / Low Clouds is an RGB composite based upon infrared channel data from the Meteosat Second Generation satellite. It is designed and tuned to monitor the evolution of night-time fog / low stratus. Other (secondary) applications are the detection of fires, low-level moisture boundaries and cloud classification in general. It should be noted that as the product is tuned for night-time conditions, its use during day-time is very limited. The Fog / Low Clouds RGB is composed from data from a combination of the SEVIRI IR3.9, IR10.8 and IR12.0 channels  
 
  MSG RGB MICROPHYSICS   The Day Microphysics RGB was inherited from Rosenfeld and Lensky (1998): the VIS0.8 reflectance in red approximates the cloud optical depth and amount of cloud water and ice; the IR3.9 solar reflectance in green is a qualitative measure for cloud particle size and phase, and the IR10.8 brightness temperature modulates the blue. This color scheme is useful for cloud analysis, convection, fog, snow, and fires. In this colour scheme water clouds that do not precipitate appear white because cloud drops are small, whereas large drops that are typical to precipitating clouds appear pink, because of the low reflectance at IR3.9 manifested as low green. Supercooled water clouds appear more yellow, because the lower temperature that modulate the blue component. Cold and thick clouds with tops composed of large ice particles, e.g., Cb tops, appear red. Optically thick clouds with small ice particles near their tops appear orange.  
 
  MSG RGB NATURALCOLOR   The Natural Color RGB makes use of three solar channels: VIS0.6, VIS0.8 and NIR1.6. In this color scheme vegetation appears greenish because of its large reflectance in the VIS0.8 channel (the green beam) compared to the NIR1.6 (red beam) and VIS0.6 (blue beam) channels. Water clouds with small droplets have large reflectance at all three channels and hence appear whitish, while snow and ice clouds appears cyan because ice strongly absorbs in NIR1.6 (no red). Bare ground appears brown because of the larger reflectance in the NIR1.6 than at VIS0.6, and the ocean appears black because of the low reflectance in all three channels.  
 
  MSG RGB SNOW   The main application of the Snow RGB is the detection of fog / low clouds and snow during day-time. In this color scheme snow appears red because of the strong absorption in the NIR1.6 and IR3.9 channels (no green and blue), while fog / low clouds appear whitish. Small particle ice cloud appears orange, while large particle ice cloud appears with greater red component. Snow on the ground appears as full red, because its grains are usually much larger than cloud ice particles.

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