• # MIRAVI stands for MERIS Images RApid VIsualization and it's a data-driven system for real time image rendering and quality analysis. Those images, though fascinating, are not suitable for scientific use. Scientists usually prefer to work with MERIS data products, which fully exploit the 15 spectral bands of the instrument, and which are generated with sophisticated algorithms. # MIRAVI generates the images directly from the MERIS raw data (i.e. the Level 0 data), usually available within 2 hours from data acquisition, depending whether the raw data have been transmitted directly to ground stations, or first recorded onboard then transmitted to ground stations. # The MIRAVI image processing does not intend to provide a very accurate geolocation or calibration. The high geolocation accuracy is achieved within the standard MERIS data products (less than ½ pixels). # MIRAVI generates the images using the MERIS Full Resolution (FR) mode (resolution about 260 m) which is activated systematically over land and coastal areas of Europe, Africa and Asia, and non-systematically over America. In its Reduced Resolution (RR) mode (resolution about 1200 m), MERIS operates systematically along its orbit illuminated by the sun. # MERIS data products are available to scientists as follows: # MERIS RR mode products: available through registration at the ESA Earth Observation Principal Investigator website. For registered users, the MERIS RR products are available systematically via the Internet or through ESA's Data Dissemination System, free of charge. # MERIS FR mode products: available after acceptance of a proposal submitted at the ESA Earth Observation Principal Investigator website. For approved users, the MERIS FR products are available on request, at cost of reproduction. # Additional information can be provided by the ESA Earth Observation Help desk at MIRAVI has been designed and developed by Chelys and it has been provided to ESA to allow the systematic generation of Meris FR true color images (starting from the level0 product) and to perform a systematic quality check on the Meris FR level0 raw data. Summary provided by
  • Meris Image Rapid Visualization, European Space Agency